Datasheet TDA5149G Datasheet (Philips)

INTEGRATED CIRCUITS

DATA SH EET

TDA5149G

12 V Voice Coil Motor (VCM) driver
and spindle motor pre-driver
combination chip

Product specification
File under Integrated Circuits, IC11

1996 May 06

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

FEATURES
General features

• Single-chip voice coil motor driver and spindle motor
pre-driver

• Internal voltage reference generator

• Programming of timing parameters via the serial bus

• Control of sleep, brake and disable modes for both the

VCM and spindle via the serial bus

• Temperature monitor circuit

• General purpose uncommitted operational amplifier.

Voice coil motor driver

• On-board full-bridge power DMOS driver with low R

• Class AB linear amplifier with no dead zone

• Adjustable gain and bandwidth

• Retract circuit operating at power-down.

Spindle motor pre-driver

• Designed to drive external N-channel power MOSFETs
for brushless, sensorless DC motors

• Internal or external commutation control

• Digital commutation timing

• Average motor supply current control with Pulse Width

Modulation (PWM)

• Soft switching under PWM control

• Spindle brake after park at power-down.

DSon

APPLICATIONS

• 12 V high-performance hard disk drives.

GENERAL DESCRIPTION

The TDA5149G is a combination of a voice coil motor
driver and a spindle motor pre-driver, capable of operating
12 V high-performance hard disk drives.

The device integrates a spindle pre-driver that drives three
external N-channel power MOSFETs in order to drive a
three-phase brushless, sensorless DC motor in full wave
mode. In the normal mode, commutations are generated
from the internal Back EMF (BEMF) sensing circuitry.
Commutations, however, can also be generated from an
external source, thereby providing the possibility of driving
the motor in the stepper-motor mode.

The VCM driver is a linear transconductance amplifier
capable of handling currents up to 1.65 A. It allows
external adjustment of the gain and compensation.
The TDA5149G also contains two drivers for a latch that
secures the heads in the event of power-down.

To control functions such as park, brake, sleep or disable
and to program the different timing parameters, the
TDA5149G is provided with a three-wire serial port. A high
precision voltage monitor is also included, for both
5 and 12 V power supplies. Finally, the IC contains a
temperature monitor circuit and an uncommitted
operational amplifier connected to VDD, which can be used
freely within the application. The device is contained in a
LQFP64 package with 4 pins connected to the lead frame
for improved heat dissipation.

TDA5149G

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

DD

V

DDD

V

DDA1

I

oVCM

R

DSon

ORDERING INFORMATION

TYPE

NUMBER

TDA5149G LQFP64 plastic low profile quad flat package; 64 leads; body 10 × 10 × 1.4 mm SOT314-2

1996 May 06 2

general supply voltage (pin 54) 10.8 12.0 13.2 V
digital supply voltage (pin 55) 4.5 5.0 5.5 V
analog supply voltage (pin 27) 4.5 5.0 5.5 V
voice coil motor output current − − 1.65 A
VCM power DMOS total on-resistance

(including leads and bond wires)

NAME DESCRIPTION VERSION

Tj= 25 °C − − 0.65 Ω
Tj= 125 °C − − 1.1 Ω

PACKAGE

Philips Semiconductors Product specification

Fig.1 Block diagram of the spindle part.

handbook, full pagewidth

MGE657

SAWTOOTH

OSCILLATOR

SERIAL

PORT

VPARK
VCM_CONT1
VCM_CONT2
VGAINSEL
SLEEP

COMMUT. DELAYS
SBRAKE

SDISABLE
SPINMODE
COMMCLOCK

INIT

TRIGGER

CSS2 dis

SPWM comp 1

SPWM comp 2

CSS2 short
CSS1 dis

CSS1 short
LOOP1 select

CHARGE

PUMP

BRAKE
DELAY

22

CSS1

CSS2

23

STOSC

24

FG

57

SCANTEST

56

SCANOUT

25

SENABLE

61

SDATA

59

SCLOCK

60

CLOCK

58

54

V

DD

45

H0

3

H1

5

L1

6

H2

8

L2

9

H3

11

L3

4

MOT1

7 MOT2

2

MOT0

10

MOT3

19

ISPIN

13
14

SPINSENSEH
SPINSENSEL

63
62

CAPX2

CAPX1

12 V

CLAMP

to the
VCM

MOT1

MOT2

MOT3

3 kΩ

3 kΩ

1 kΩ

3 kΩ

from the

PWM DAC

R

sense

1

CAPY

IDRIVE
12

BRAKEPOWER

BRAKEDELAY

AGND

DGND
64

16

51

47

V

DDA1

V

DDD

55

27

from the

POR circuit

to the

LATCH

to the

VCM

DIGITAL

CONTROL

21

RPOS

20
SICOMP

18
SINTIN

15
SISENS

5×

INTG

COMP

COMP

BEMF comp 1

BEMF comp 2

BEMF comp 3

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

COMP

COMP

COMP

0.4 V

LACTIVE

LHOLD

TDA5149G

1

2

3

1
2
3
4
5

BLOCK DIAGRAMS

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

TDA5149G

1996 May 06 3

Philips Semiconductors Product specification

Fig.2 Block diagram of the VCM and RESET circuits.

handbook, full pagewidth

MGE656

M

FOLLOWER

FOLLOWER

PREAMP

PREAMP

PARK

CIRCUITRY

SENSE

BUFFER

REFERENCE

CURRENT

GENERATOR

REFERENCE

VOLTAGE

GENERATOR

LATCH

CIRCUITRY

LACTIVE LHOLD

from the

serial port

TEMPERATURE

SENSOR

POWER-

ON RESET

GENERATOR

OPAMP

to the
PARK
circuit

COMP

COMP

+5 V

+12 V

+12 v

from the

serial port

from the

POR circuit

C

comp

R

comp

V

CMIN2

V

CMIN1

R

fb

V

CMSENSOUT

VCM

ref

V

ref(o)

I

ref

POR12

ADJ

POR5

ADJ

VCM_CONT1
VCM_CONT2

AMPIN−

AMPIN+

AMPOUT
CLAMP

PGND1

V

DDV

V

CM+

V

CM−

PGND2

V

CMSENSEL

V

CMSENSEH

latch

LATCHACTIV

LATCHHOLD

TEMPMON

RESETPRESETA

POR

DELAY

26 35 34

37

52

53

42

48

43

44

39

36

32

38

33

31

30

40

41

50
46

49

17

29

28

100 nF

R

8

from the
spindel

27 Ω

100 nF

27 Ω

R

in2

R

in1

VCM
input

VCM

reference

input

TDA5149G

disable

park

brake

V

GAINSEL

V

CMref

R

R

*

20 kΩ

23 kΩ

50 kΩ

10 kΩ

10 kΩ

50 kΩ

−

+

−

+

−

+

+

−

−

+

−

+

+5 V

+12 V

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

TDA5149G

1996 May 06 4

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

PINNING

SYMBOL PIN I/O DESCRIPTION

CAPY 1 I/O charge pump capacitor
MOT0 2 I motor centre tap input
H1 3 O driver output to gate of upper power FET 1
MOT1 4 I back EMF comparator input 1
L1 5 O driver output to gate of lower power FET 1
H2 6 O driver output to gate of upper power FET 2
MOT2 7 I back EMF comparator input 2
L2 8 O driver output to gate of lower power FET 2
H3 9 O driver output to gate of upper power FET 3
MOT3 10 I back EMF comparator input 3
L3 11 O driver output to gate of lower power FET 3
IDRIVE 12 I adjustment for output stage drive current
SPINSENSEH 13 I positive spindle sense amplifier input
SPINSENSEL 14 I negative spindle sense amplifier input
SISENS 15 O spindle sense amplifier output
AGND 16 − general analog ground; note 1
I

ref

SINTIN 18 I negative integrator input
ISPIN 19 I positive integrator input, average current adjustment
SICOMP 20 O integrator output
RPOS 21 I duty cycle modulator input
CSS1 22 I/O soft switching capacitor 1
CSS2 23 I/O soft switching capacitor 2
STOSC 24 I/O sawtooth oscillator capacitor
SCANOUT 25 O test output
POR

DELAY

V

DDA1

POR5

ADJ

POR12

ADJ

AMPIN− 30 I negative input of the uncommitted operational amplifier
AMPIN+ 31 I positive input of the uncommitted operational amplifier
PGND1 32 − power ground 1 for VCM DMOS; note 1
AMPOUT 33 O uncommitted operational amplifier output
RESETP 34 O power-on reset digital output with passive pull-up resistor
RESETA 35 O power-on reset digital output with active pull-up resistor
V

CM−

TEMPMON 37 O temperature monitor output
CLAMP 38 I/O clamp capacitor used for head retraction
V

DDV

V

CMIN2

17 O reference current generator output

26 I/O power-on reset delay capacitor (active LOW)
27 − analog supply voltage 1 (+5 V)
28 O adjustment of POR threshold (for +5 V)
29 O adjustment of POR threshold (for +12 V)

36 O negative output voltage of the VCM power stage

39 − power supply for VCM DMOS driver (+12 V)
40 I switchable VCM control input voltage

TDA5149G

1996 May 06 5

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

SYMBOL PIN I/O DESCRIPTION

V

CMIN1

V

CMSENSEH

V

CMSENSEL

V

CM+

H0 45 O gate control of the isolating power FET
VCM

ref

BRAKEPOWER 47 I/O reservoir capacitor for the brake/park circuitry
PGND2 48 − power ground 2 for VCM DMOS; note 1
V

ref(o)

V

CMSENSOUT

BRAKEDELAY 51 I/O powerless brake delay adjustment
LATCHHOLD 52 O latch hold output
LATCHACTIV 53 O latch activate output
V

DD

V

DDD

SCANTEST 56 I test mode input
FG 57 O commutation frequency generator output
CLOCK 58 I clock for digital timing input
SDATA 59 I serial port data input
SCLOCK 60 I serial port clock input
SENABLE 61 I serial port enable input
CAPX2 62 I/O charge pump capacitor input/output
CAPX1 63 I/O charge pump capacitor input/output
DGND 64 − digital ground; note 1

41 I VCM control input voltage
42 I positive VCM sense amplifier input voltage
43 I negative VCM sense amplifier input voltage
44 O positive output voltage of the VCM power stage

46 I reference voltage input for the VCM

49 O reference voltage generator output
50 O VCM sense amplifier output voltage

54 − general supply voltage (+12 V)
55 − digital supply voltage (+5 V)

TDA5149G

Note

1. The 4 ground pins are tied to the lead frame for better heat dissipation.

1996 May 06 6

Philips Semiconductors Product specification

Fig.3 Pin configuration.

handbook, full pagewidth

TDA5149G

MGE654

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

PGND2
BRAKEPOWER

VCM

ref
H0
V

CM+

V

CMSENSEL

V

CMSENSEH

V

CMIN1

V

CMIN2

V

DDV

CLAMP
TEMPMON
V

CM−

RESETA
RESETP
AMPOUT

CAPY
MOT0

H1

MOT1

L1

H2

MOT2

L2

H3

MOT3

L3

IDRIVE

SPINSENSEH

SPINSENSEL

SISENS

AGDN

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

DGND

CAPX1

CAPX2

SENABLE

SCLOCK

SDATA

CLOCK

FG

SCANTEST

V

DDD

V

DD

LATCHACTIV

LATCHHOLD

BRAKEDELAY

V

CMSENSOUT

V

ref(o)

I

ref

SINTIN

ISPIN

SICOMP

RPOS

CSS1

CSS2

STOSC

SCANOUT

POR

DELAY

V

DDA1

POR5

ADJ

POR12

ADJ

AMPIN−

AMPIN+

PGND1

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

TDA5149G

1996 May 06 7

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

FUNCTIONAL DESCRIPTION
Spindle

The spindle section contains both the low and high side
pre-drivers for a three phase DC brushless motor.
The digital commutation control, using the timing
information provided via the serial port, is responsible for
the proper switch-on and switch-off of the external power
FETs. It is also responsible for selecting the correct BEMF
comparator.

For optimum power efficiency, a continuous PWM method
is used to control the average current from the power
supply to the motor coils. This PWM mode, by controlling
the average power supply current, produces a lower
torque ripple and thus lower audible noise. In order to
reduce further acoustic noise the TDA5149G is provided
with a soft switching circuit to turn-on and turn-off linearly
the switching current under PWM control. The switching
transition time is controlled by the digital commutation
circuit and is fixed to 50% of the time between two
zero-crossings, i.e. 30° of the electrical revolution.

Soft switching is achieved by activating, during
commutation, a free-running duty-cycle modulator
controlled by a linearly decreasing voltage across a
capacitor. This will reduce the current smoothly in the
off-going leg to zero. In conjunction with this additional
PWM open loop, the average current control regulates the
sum of the current in the off-going and on-going leg.

This method requires two PWM control loops; one to
control the average current (main loop) and one to control
the current in the off-going leg. The swapping of the two
loops is realized with a pair of analog switches that are
sequentially switched by the digital commutation circuitry.

The PWM control also causes PWM pulses on the back
EMF. These pulses disturb correct sensing of the back
EMF for the zero-crossing detection. Consequently,
edge-triggered latches are inserted behind the back EMF
comparators, thus ensuring reliable back EMF sensing.

In the SPINMODE, programmable via the serial bus, the
user can feed their own commutation pulses to the
pre-drivers and control the motor in the stepper-motor
mode. The commutation pulses are applied to the
TDA5149G via the serial bus by setting the COMMCLK bit
successively to logic 1 and logic 0.

TDA5149G

The different control modes of the TDA5149G can be
commanded via the serial bus. These modes are as
follows:

• Sleep mode: all analog circuits, except the power supply
monitor, are switched off to reduce the power
consumption of both the 12 and 5 V supplies.

• Disable mode: the output voltage of all pre-drivers is
LOW thus the external power MOSFETs are not
conducting.

• Brake mode: all low side pre-drivers are turned on
(output voltage HIGH) thus switching on the low-side
power MOSFETs. In this way the back EMF voltage of
the motor is short-circuited to ground.

Voice coil motor

The VCM is a linear, symmetrical, class AB, H-bridge type
power amplifier with all power devices on-chip. The driver
is a transconductance amplifier that controls the output
currents up to 1.65 A. The driver is constructed in a
master-slave configuration with the zero current level
internally adjusted in such a way that it corresponds to the
middle of the output swing. Moreover, the gain of the slave
has been made greater than 1 in order to ensure full
saturation of the driver output VCM+.

The gain of the closed loop is programmable, using the
V

GAINSEL

bus. A sense resistor (Rs) allows the measurement of the
VCM current. The voltage across this resistor is connected
to an accurate sense amplifier with a typical gain of 5.
The output of the sense amplifier (V
to the input of the VCM amplifier. Because of the symmetry
of the circuit, the compensation network can be connected
between the VCM1 input and the VCM− output.

Control modes such as VCM-BRAKE, VCM-DISABLE and
VCM-PARK can be controlled via the serial bus.

Latch drivers

The TDA5149G provides the possibility of driving an
external latch to secure the VCM heads. There are two
modes; the activate mode (LACTIVE) and the hold mode
(LHOLD). The hold mode is used to preserve power.
Both modes are controlled via the serial bus. The drivers
are switched off during the SLEEP mode or in the event of
a power-down.

bit. This bit can be programmed via the serial

CMSENSOUT

) is fed back

1996 May 06 8

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

Power-on/power-off reset

The power-on reset circuitry monitors the analog, digital
and general supplies. The voltage thresholds have been
set internally for both supplies, i.e. 4.4 V for V
V

, and 10.5 V for VDD. External adjustment and

DDD

filtering, to suppress supply spikes, has been made
possible through the pins POR5

and POR12

ADJ

When either of the supplies falls below their threshold
levels, the reset circuit provides two active LOW output
signals. The RESETA signal is a full CMOS output and the
RESETP signal has an active pull-down MOS transistor
with a passive pull-up resistance of 10 kΩ. The latter can
be used for emulation purposes. Both signals remain LOW
until the supply voltages are again above the threshold
level, delayed by a time constant period that is determined
by the value of the capacitor connected to pin POR

A park sequence is initiated on a reset fault. This includes
disabling the actuator latch drivers and starting a delayed
spindle brake operation by switching on the low side
pre-drivers simultaneously. This brake delay is determined
by an external RC combination connected to
BRAKEDELAY. Actuator PARK and spindle BRAKE can
also be controlled via the serial port.

At power-up, the two reset output signals (RESETA and
RESETP) will remain LOW as long as either supply
voltage is below the specified threshold plus the hysteresis
voltage. Once the supply voltages are above their specific
trip levels, the two reset signals become HIGH after the
power-on reset delay (POR

). This delay time is

DELAY

determined by the value of the capacitor connected to the
POR

DELAY

pin.

DDA

ADJ

and

.

DELAY

.

TDA5149G

To ensure that the stored energy in the clamp capacitor is
only used for the park operation, the CLAMP input must be
isolated from the power supply. This can be achieved by
using a Schottky diode or a reverse connected N-channel
power FET (see Fig.1). The TDA5149G provides an
output H0 to control this power FET.

At power-down the brake delay circuit is also enabled.
The brake delay circuit is supplied by the energy stored in
the capacitor (charged during normal operation from VDD)
that is connected to the BRAKEPOWER pin. Both the
BRAKEDELAY and BRAKEPOWER pins are then isolated
from the 12 V supply voltage. When the voltage on the
BRAKEDELAY pin reaches a value of 1.6 V (typ.), the
low-side external power FETs are turned on to brake the
spindle motor. The BRAKEPOWER capacitor then
supplies the current to keep the power FETs conducting.
This means that the voltage on this capacitor decreases
with time.

Serial port

The serial port is used to modify the various operational
modes of the TDA5149G and to adjust the timing
parameters to ensure the proper commutation sequence
of the spindle motor. It is a synchronous, slave only,
three-wire communication port with data (SDATA), clock
(SCLOCK) and enable (SENABLE) inputs.

The serial port requires the data to be sent in bytes, the
LSB (data 0) to be sent first and the MSB (address 2) last.
The three most significant bits (MSBs) determine the
register address, the remaining five bits represent the
data, which means up to 8 registers can be independently
addressed.

Powerless park/brake

As with the normal retract procedure, an actuator park
sequence is initiated whenever a power-down situation
occurs. The power-on/power-off reset circuit generates the
two active LOW reset signals and also activates the VCM
park circuit. The VCM park circuit provides a voltage,
retrieved from the rectified back EMF voltage of the
running-out spindle, of 1.2 V (typ.) to the VCM pin.
The voltage at pin VCM+ is 0 V. This voltage is supplied by
the capacitor C

that is connected to the CLAMP pin.

CLAMP

This capacitor smooths the rectified back EMF and stores
the electrical energy generated by the motor.

1996 May 06 9

When SENABLE is LOW, the serial port is disabled and
the IC is not affected by any change both on SDATA and
SCLOCK. When SENABLE is HIGH the data is written
serially to the shift register on the rising edge of SCLOCK.
When SENABLE goes LOW the shifting sequence is
stopped and the last 8 bits that are clocked in are latched
into the appropriate control register. Therefore, the
transmission of two consecutive bytes requires that
SENABLE is LOW for at least a duration of ‘t’
(see Chapter “Characteristics”).

Philips Semiconductors Product specification

Fig.4 Power-on/power-off reset timing.

handbook, full pagewidth

MBH021

V

CC

POR

0.8 V

V

hys

threshold

t

t

t

C

t

C

Fig.5 Serial port signal timing

handbook, full pagewidth

MGE655

t

pm

t

h1

t

su1

t

su1

t

su2

t

h2

t

su2

t

h2

SCLOCK

SENABLE

SDATA

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

TDA5149G

1996 May 06 10

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

Table 1 Serial port registers

REGISTER

ADDRESSED

Reg # 0 INIT COMMCLCK SPINMODE SDISABLE SBRAKE
Reg # 1 not used HARD_SW LHOLD LACTIVATE SLEEP
Reg # 2 not used not used VGAINSEL VCM_CTRL_1 VCM_CTRL_0
Reg # 3 not used not used PRESCALER_2 PRESCALER_1 PRESCALER_0
Reg # 4 STARTUP_4 STARTUP_3 STARTUP_2 STARTUP_1 STARTUP_0
Reg # 5 WATCHDOG_4 WATCHDOG_3 WATCHDOG_2 WATCHDOG_1 WATCHDOG_0
Reg # 6 not used not used COMDELIM_2 COMDELIM_1 COMDELIM_0
Reg # 7 BLANK_4 BLANK_3 BLANK_2 BLANK_1 BLANK_0

Table 2 REG # 0: address 000; DATA = | INIT | COMMCLK | SPINMODE | SDISABLE | SBRAKE |

DATA BIT

INIT 1 initializes the three bits commutation shift register in state 1 (see Table 13)
COMMCLK 0 commutation clock in stepper mode (one commutation every LOW-to-HIGH transition)
SPINMODE 0 stepper/BEMF detection mode selection. SPINMODE = 1 means stepper motor mode

SDISABLE 1 logic 1 sets the pre-drivers outputs LOW so that the spindle motor coils are in the

SBRAKE 0 logic 1 sets the lower pre-driver outputs HIGH and the upper pre-driver outputs LOW

DATA4 DATA3 DATA2 DATA1 DATA0

RESET

STATE

in hard-switching configuration

high-impedance state

so that the spindle motor coils are shorted to ground

DESCRIPTION

Table 3 REG # 1: address 001; | not used | HARD_SW | LHOLD | LACTIVE | SLEEP |

DATA BIT

HARD_SW 0 logic 1 disables the soft switching circuitry, which means PWM is applied on the lower

LHOLD 0 logic 1 turns on the hold current supplied by V

LACTIVE 0 logic 1 turns on the activate current supplied by VDD through the latch
SLEEP 0 logic 1 disables spindle, VCM and latch driver outputs. The whole analog circuitry is

Table 4 REG # 2: address 010; | not used | not used | VGAINSEL | VCM_CTRL_1 | VCM_CTRL_0 |

DATA BIT

VGAINSEL 1 logic 1 turns on the switch between V

VCM_CTRL_1 1 see Table 5
VCM_CTRL_0 1 see Table 5

RESET

STATE

RESET

STATE

DESCRIPTION

FETs only.This mode is also forced in stepper motor mode.

through the latch. It is ignored if

DDD

LACTIVE = 1

turned off except the reference bandgap and the voltage monitors. The uncommitted
operational amplifier is also cut off.

DESCRIPTION

CMIN1

transconductance of the VCM closed loop

and V

, resulting in a higher gain for the

CMIN2

1996 May 06 11

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

Table 5 Operating conditions for VCM_CTRL_1 and VCM_CTRL_0

VCM_CTRL_1 VCM_CTRL_0 MODE

0 0 VCM operating
0 1 VCM brake
1 0 VCM park
1 1 VCM disable

Table 6 REG # 3: address 011; | not used | not used | PRESCALER_REG [2 to 0]

DATA BIT

PRESCALER_2 0 sets the division factor that is applied to the external clock (pin 58) in order to
PRESCALER_1 1
PRESCALER_0 0

Note

1. CLOCK (pin 58) must be valid before the end of the POR delay.

RESET

STATE

DESCRIPTION

obtain the appropriate internal clock frequency for the proper determination of the
commutation delays. The prescaling factors can be obtained as shown in Table 7

(1)

Table 7 Prescaler factors

PRESCALER_REG FREQUENCY (MHz)

0 0 0 1
0 0 1 2
0 1 0 4
0 1 1 8
1 0 0 16
1 0 1 32
1 1 0 64
1 1 1 128

Note

1. Internal clock frequency is equal to external clock frequency divided by prescaler ratio.

Table 8 REG # 4: address 100; | STARTUP_REG[4 to 0] |

DATA BIT

STARTUP_4 0
STARTUP_3 0
STARTUP_2 0
STARTUP_1 0
STARTUP_0 0

RESET

STATE

DESCRIPTION

The start-up timer instigates the spin-up in the absence of the back EMF zero
crossings. If the rotational speed is high enough, the commutations are
sequenced regardless of the start-up counter. But if no BEMF zero crossing
occurs, which is the case if the motor is stationary or rotating very slowly, the
start-up timer reaches its terminal count given by the STARTUP_REG, thereby
causing the next commutation. If t

STARTUP delay = [(({0 to 31} × 32) + 2) × 511) + 2] × t

is the period of the internal clock then;

IC

(1)

IC

1996 May 06 12

Philips Semiconductors Product specification

WATCHDOG delay 0 to 31{ } 64×( ) 1+[ ] tIC×=

{ } 4×( ) 1+[ ] tIC×=

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

Table 9 REG # 4: address 101; | WATCHDOG_REG[4 to 0] |

DATA BIT

WATCHDOG_4 0
WATCHDOG_3 0
WATCHDOG_2 0
WATCHDOG_1 0
WATCHDOG_0 0

Table 10 REG # 6: address 110; | not used | not used | COMDELIM_REG[2 to 0] |

DATA BIT

COMDELIM_2 0 Defines the maximum commutation delay limit by setting the saturation value of the
COMDELIM_1 0
COMDELIM_0 0

Table 11 Commutation delay limit

RESET

STATE

RESET

STATE

DESCRIPTION

The watchdog timer checks for correct back EMF polarity, which indicates correct
rotation of the motor

DESCRIPTION

zero crossing counter. tIC represents the period of the internal clock. Table 11
shows the delays which can be obtained.

COMDELIM_REG COUNTER SATURATION VALUE MAXIMUM COMMUTATION DELAY

111 2047 tIC× 1023

110; note 1 1535 tIC× 767

101 1023 tIC× 511

100; note 1 767 tIC× 383

011 511 tIC× 255

010; note 1 383 tIC× 191

001 255 tIC× 127

000; note 1 191 tIC× 95

Note

1. Even COMDELIM _REG values must be avoided.

Table 12 REG # 7: address 111; | BLANK_REG[4 to 0] |

DATA BIT

BLANK_4 0
BLANK_3 0
BLANK_2 0
BLANK_1 0
BLANK_0 0

RESET

STATE

In the hard switching mode, the blank delay inhibits the back EMF comparator
outputs just at the moment the MOT outputs are commutating, until they have been
stabilized again. To avoid false zero-crossing detection, the blank delay operates in
the same way at the end of the fly-back pulse (hard-switching mode), or at the end
of the soft-switching interval (soft-switching mode).

BLANK delay 0 to 31

DESCRIPTION

1996 May 06 13

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

Table 13 Configuration of the six commutation states in hard-switching mode

STATE SHIFT REGISTER H1

(3)

1

111 ON − − − PWM −

(1)

2 011 ON − − − − PWM
3 001 − ON − − − PWM
4 000 − ON − PWM − −
5 100 − − ON PWM − −
6 110 − − ON − PWM −

Note

1. H1, H2 and H3 are the upper power FETs connected to MOT1, MOT2 and MOT3 respectively.

2. L1, L2 and L3 are the lower power FETs connected to MOT1, MOT2 and MOT3 respectively.

3. INIT = 1 means ‘state 1’ situation with PWM stuck in OFF on L2.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

V

V

V

V

DD

DDD

DDA

DDV

CM+

general supply voltage indefinite time period −0.3 +13.5 V

digital supply voltage indefinite time period −0.3 +6.0 V

analog supply voltage indefinite time period −0.3 +6.0 V

supply for VCM DMOS driver indefinite time period −0.3 +13.5 V

output voltage of the VCM power
stage

V

CM−

output voltage of the VCM power
stage

I

CM+

output current of the VCM power

current peak <0.5 s − 2.5 A

stage

ICM− output current of the VCM power

current peak <0.5 s − 2.5 A

stage

V

MOT

BEMF comparator input voltage

(pins 4, 7 and 10)
V
T
T

n
stg
j(max)

input voltages on other pins −0.3 − V

IC storage temperature −55 +125 °C

maximum junction temperature − 150 °C

H2

(1)

H3

(1)

L1

(2)

−0.3 +15 V

−0.3 +7.0 V

−0.3 +7.0 V

−0.3 +15 V

−0.7 +15 V

−0.7 +15 V

−0.7 − V

L2

(2)

L3

(2)

1996 May 06 14

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

HANDLING

Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling MOS devices.

ESD according to MIL STD 883C - method 3015 (HBM 1500 Ω, 100 pF) 3 pulses positive and 3 pulses negative on each
pin versus ground - Class 1: 0 to 1999 V.

THERMAL CHARACTERISTICS

SYMBOL PARAMETER

R

th j-a

thermal resistance from junction to ambient in free air 54 K/W

Note

1. This is obtained in a standard PCB: standard PCB size: 100 mm × 75 mm × 1.6 mm; material = glass epoxy FR4,
single copper layer. With dedicated PCB tailored to heat dissipation, the thermal resistance could be as low as
40 K/W.

OPERATING CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

(1)

VALUE UNIT

Temperature

T

amb

operating ambient temperature −5 − +70 °C

Supplies: pins 27, 55, 54 and 39

V
V
I

DD

I

DDA

V

DDA
DDD

DDV

analog supply voltage 4.5 5.0 5.5 V
digital supply voltage 4.5 5.0 5.5 V
general supply voltage 10.8 12.0 13.2 V
analog supply current normal mode − 5.5 7.5 mA
supply voltage for VCM DMOS

driver

VCM reference voltage: pin 46 (VCM

VCM

ref

reference voltage input level 1.9 − 4.0 V

Charge pump: pin 1 (CAPY)

C
C

CAPX
CAPY

charge pump capacitor between CAPX1 and CAPX2 6.8 10 13 nF
charge pump capacitor between CAPY and ground 16 22 30 nF

CLAMP: pin 38

C

CLAMP

clamp capacitance between CLAMP and ground − 47 − µF

BRAKEPOWER: pin 47

C

BP

brakepower capacitance note 1 − 47 − µF

Sense resistors

R

SSENS

R

VSENS

spindle sense resistor 0.15 − − Ω
VCM sense resistor 0.15 − − Ω

ref

10.8 12.0 13.2 V

)

1996 May 06 15

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Spindle pre-drivers: pin 12 (IDRIVE)

R

IDRIVE

Reference current: pin 17 (I

R

Iref

Sawtooth oscillator: pin 24 (STOSC)

C

SO

Power-on reset: pin 26 (POR

C

PORDELAY

Digital inputs for the serial port: pins 58 to 61 (CLOCK, SDATA, SCLOCK and SENABLE)

V

IH

V

IL

Notes

1. To guarantee a powerless brake duration of at least 10 s. A low leakage capacitor must be used (<0.1 µA).

2. For a frequency range of 25 to 100 kHz. C

3. For a RESETA/RESETP pulse duration of approximately 100 ms.

resistance for pre-driver current

32 − 470 kΩ

adjustment

)

ref

resistance for reference current

47 − 470 kΩ

adjustment

sawtooth oscillator capacitance note 2 150 − 700 pF

)

DELAY

POR

capacitance note 3 − 100 − nF

DELAY

HIGH level input voltage 2.4 − − V
LOW level input voltage − − 0.8 V

STOSC

= 0.775 (I

ref/fPWM

).

CHARACTERISTICS

VDD= 12 V; V

DDA

= V

DDD

= 5 V; T

= 25 °C; unless otherwise specified.

amb

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supplies: pins 27, 55 and 54

I

DDA

analog supply current normal mode − 5.5 7.5 mA

sleep mode − 1.6 2.0 mA

I

DDD

digital supply current normal mode − 5.5 7.5 mA

sleep mode − 1.6 2.0 mA

I

DD

general supply current normal mode − 12 17 mA

sleep mode − 2.9 4.0 mA
VOLTAGE REFERENCE: PIN 49 (V
V

ref(o)

reference voltage generator

ref(o)

)

I

= ±1 mA 2.47 2.57 2.67 V

ref(o)

output
CURRENT REFERENCE: PIN 17 (I
I

ref(o)

reference current generator

ref(o)

)

R

= 120 kΩ; note 1 20.6 21.4 22.2 µA

ref

output
TEMPERATURE MONITOR: PIN 37 (TEMPMON)
V

OLT

output voltage at LOW

Tj= 25 °C 2.15 2.17 2.19 V

temperature
V

OHT

output voltage at HIGH

Tj= 150 °C; note 2 3.03 3.055 3.08 V

temperature

1996 May 06 16

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VCM REFERENCE: PIN 46 (VCM
I

i

input current V

Spindle: pre-drivers

HARGE PUMP: PIN 1 (CAPY)

C
V

CP

V

ripple(p-p)

charge pump DC voltage I

voltage ripple

(peak-to-peak value)
BACK EMF COMPARATORS: PINS 2, 4, 7 AND 10 (MOT0, MOT1, MOT2 AND MOT3)
V

iCM

I

bias

V

SWhys

∆V

CSW

common mode input voltage note 4 −0.7 − VDD+ 0.7 V

input bias current MOT0 −10 − 0 µA

switching level for hysteresis for negative transition

variation in comparator

switching levels for one IC
V

i(hys)

input voltage hysteresis − 0.5 − mV
SPINDLE LOWER PRE-DRIVERS: PINS 5, 8 AND 11 (L1, L2 AND L3)
V

OH

I

source

I

sink

HIGH level output voltage IOH= −0.5 mA 7.2 8.0 8.8 V

output source current R

output sink current 1.2 1.6 2.0 mA
SR slew rate R

SPINDLE UPPER PRE-DRIVERS: PINS 3, 6 AND 9 (H1, H2 AND H3)
V

OH

I

source

I

sink

HIGH level output voltage IOH= −0.5 mA 18.0 18.8 19.6 V

output source current R

output sink current 1.3 1.75 2.2 mA
SR slew rate R

H0: PIN 45
V

o

output voltage normal condition 18.3 18.8 20 V
OUTPUT CURRENT ADJUSTMENT: PIN 12 (IDRIVE)
I

refSP

spindle pre-driver reference

current

ref

)

= 2 V; note 3 −250 − +60 µA

VCMref

< 1 mA 18.5 19.3 19.8 V

CAPY

I

= 1 mA − − 0.8 V

CAPY

−13 − −7 mV

with respect to MOT0
for positive transition

7 − 13 mV

with respect to MOT0

−4.2 − +4.2 mV

= 120 kΩ; note 5 −0.9 −0.7 −0.5 mA

IDRIVE

= 120 kΩ; note 6 − 10 − V/µs

IDRIVE

= 120 kΩ; note 7 −1.3 −1.0 −0.7 mA

IDRIVE

= 120 kΩ; note 6 − 10 − V/µs

IDRIVE

R

= 120 kΩ; note 7 20.6 21.4 22.2 µA

IDRIVE

Spindle: PWM

SPINDLE SENSE AMPLIFIER: PINS 13 AND 14 (SPINSENSEH AND SPINSENSEL)
∆V

i

I

sense+

differential input voltage 0 − 1.84 V

positive input sense current −60 −51 −42 µA

1996 May 06 17

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

SISENS: PIN 15
∆V

o

V

o

G

S

f

UG

SPINDLE CURRENT LOOP FILTER AMPLIFIER: PINS 18 AND 19 (SINTIN AND ISPIN)
V

iCM

V

i(os)

I

i

SICOMP: PIN 20
V

OL

V

OH

SR slew rate 0.5 0.9 1.5 V/µs
f

UG

SPINDLE PWM COMPARATORS: PINS 22 AND 23 (CSS1 AND CSS2)
V

dc

I

sink(d)

I

sink(s)

ANALOG SWITCHES: PIN 21 (RPOS)
R

Son

R

Soff

SAWTOOTH OSCILLATOR: PIN 24 (STOSC)
V

SUL

V

SLL

I

source

I

sink

Voice coil motor driver

output voltage shift 1.38 1.43 1.48 V

output voltage level 1.37 − VDD− 1.2 V

spindle sense amplifier gain 4.85 5.0 5.15 V/V

unity gain bandwidth 1 − − MHz

common mode input voltage 1.3 − 3.2 V

input offset voltage −3.0 − +3.0 mV

input current −1 − 0 µA

LOW level output voltage IOL= 1 mA − − 0.5 V

HIGH level output voltage IOH= −0.6 mA 3.5 − − V

unity gain bandwidth 1 − − MHz

discharge clamp voltage I

sink current for normal CSS1 and

= 0.5 mA − − 0.45 V

CSS1,2

20.2 21.0 21.8 µA
CSS2 discharge;
R

= 120 kΩ

Iref

sink current for CSS1 and CSS2

1 − − mA

short

switch-on resistance 150 250 400 Ω
switch-off resistance 10 − − MΩ

voltage swing upper limit 2.9 3.0 3.1 V
voltage swing lower limit static test 0.53 0.55 0.57 V
source current note 8 −44.4 −42.8 −41.2 µA
sink current note 9 500 800 1100 µA

VCM PREAMPLIFIERS: PINS 41 AND 40 (V
I

V
f
G
G

i

i(os)

UG

RSon
RSoff

input current −10 − +10 µA
input offset voltage −6 − +6 mV
unity gain bandwidth − 3 − MHz
gain switch-on resistance VGAINSEL = 1 − − 60 Ω
gain switch-off resistance VGAINSEL = 0 10 − − MΩ

CMIN1

AND V

CMIN2

)

1996 May 06 18

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VCM DRIVER AMPLIFIERS: PINS 44 AND 36 (V
t

COD

G
V

vSD

OD

cross-over switch time − 2 5 µs
slave driver voltage gain 1.12 1.15 1.18 V/V
output drop voltage

including bond wires and
leads

t

RFS

recovery time from saturation − − 100 µs
SR output slew rate 1.4 2.0 − V/µs
f

UG

V

park

VCM

SENSE AMPLIFIER: PINS 43 AND 42 (V

V

I

I

I

V

CMSENSOUT

V

OSL

unity gain bandwidth 1.5 3 − MHz

park voltage over full temperature

input voltage range −0.7 − VDD+ 0.7 V

input current common mode from

: PIN 50

LOW level output saturation

voltage
V

OSH

HIGH level output saturation

voltage
G
f
V

G

s

UG

o(os)

CM

sense amplifier gain 4.85 5.0 5.15 V/V

unity gain bandwidth − 1 − MHz

output offset voltage V

common mode gain − − −50 dB

Latch drivers

CM+

AND V

CM−

)

Io= 1 A; Tj= 25 °C − − 0.65 V
Io= 0.2 A − − 0.45 V
Io= 1 A; Tj= 150 °C − − 1.1 V

0.9 1.2 1.4 V

range

CMSENSEL

AND V

CMSENSEH

)

−60 − +250 µA

0 to 12 V

IOL= 0.4 mA − 0.5 V

IOH= −0.4 mA VDD− 1.5 − − V

CMSENSEH

V

CMSENSEL

= 6 V;

= 6 V

−23 − +23 mV

LATCHACTIV: PIN 53
I

source

output source current over full temperature

range

R

∆R

DSon

DSon

FET switch-on resistance Tj= 25 °C;

/T FET switch-on resistance

I

source

= −0.5 A

temperature variation
LATCHHOLD: PIN 52
I

source

V

DO

∆V

DO

output source current −0.1 − − A

diode drop voltage Tj= 25 °C, ID= 1 mA − 750 775 mV

diode drop voltage

temperature variation
R
∆R

on

on

total on-resistance Tj= 25 °C − 8 12 Ω

total on-resistance

temperature variation

1996 May 06 19

−0.5 − − A

− − 1.2 Ω

− 6.4 − mΩ/°C

− −2 − mV/°C

− 40 − mΩ/°C

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Uncommitted operational amplifier

AMPIN−
V

i(os)

I

i(bias)

V

CM

AMPOUT: PIN 33
G

OL

f

co

PSRR power supply rejection ratio 60 − − dB
V

OH

V

OL

SR slew rate − 1.0 − V/µS

Brake delay

BRAKEPOWER: PIN 47
V

NM

I

sink

V

BV

V

D

BRAKEDELAY: PIN 51
V

NM

V

trip

I

LI

AND AMPIN+: PINS 30 AND 31

input offset voltage −3.5 − +3.5 mV

input bias current −1 − 0 µA

common mode voltage 0 − VDD− 1.6 V

open loop gain − 67 − dB

cross-over frequency CL= 10 pF − 1.5 − MHz

HIGH level output voltage IOH= −0.5 mA V

+ 0.3 − − V

DDD

LOW level output voltage IOL= 0.5 mA − − 0.3 V

normal mode voltage VDD− 0.85 − − V

input sink current prior to automatic brake;

V

BRAKEPOWER

= 9 V

while braking; over full

− 35 50 µA

− 0.6 2 µA

temperature range;

brakepower voltage for

V

BRAKEPOWER

= 6.5 V

5.0 − − V

proper brake operation

drop voltage between brake

V

BRAKEPOWER

= 6.5 V − − 0.8 V

power and L1, L2 and L3

normal mode voltage VDD− 0.85 − − V

trip level voltage for automatic

brake

leakage current over full temperature

over full temperature
range; note 10

1.4 1.7 2.0 V

−200 − +200 nA

range

1996 May 06 20

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Power-on/power-off reset

U

NDER THRESHOLD COMPARATORS: PINS 29 AND 28 (POR12

V

PORTH5

5 V threshold voltage for

power-on/power-off detection
V

DDDhys

hysteresis on V

DDD

comparator
V

PORTH12

12 V threshold voltage for

power-on/power-off detection
V

DDhys

R

POR5low

∆R

POR5low

hysteresis on VDD comparator 60 95 130 mV

POR5

POR5

lower resistance Tj= 25 °C 25340 28800 32260 Ω

ADJ

lower resistance

ADJ

temperature variation
R

Rup/Rlo

POR5

resistance ratio over full temperature

ADJ

range

R

POR12low

∆R

POR12low

POR12

POR12

lower resistance Tj= 25 °C 10560 12000 13440 Ω

ADJ

lower resistance

ADJ

temperature variation
R

Rup/Rlo

POR12

resistance ratio over full temperature

ADJ

range
POWER-ON/POWER-OFF DELAY GENERATOR: PIN 26 (POR
I

source

V

HT

source current −2.4 −2.2 −1.8 µA
RESET output threshold

note 11 2.51 2.57 2.63 V

voltage

V

LT

LOW threshold voltage − − 0.4 V

RESETP: PIN 34

V

OL

R

pu

LOW level output voltage IOL= 3 mA − − 0.4 V
pull up resistor over full temperature

range

RESETA: PIN 35

V

OH

V

OL

HIGH level output voltage IOH= −1.5 mA V
LOW level output voltage IOL= 3 mA − 0.4 V

Digital control

DELAY

AND POR5

ADJ

)

)

ADJ

4.30 4.37 4.50 V

30 55 80 mV

10.25 10.4 10.75 V

− 66 − Ω/°C

0.715 0.725 0.735 −

− 27 − Ω/°C

3.07 3.11 3.15 −

6 10 14 kΩ

− 0.7 − − V

DDD

CLOCK: PIN 58
f

clk

clock frequency − − 12 MHz

δ duty factor 40 50 60 %
FG: PIN 57
V

OH

V

OL

HIGH level output voltage IOH= −0.15 mA V

− 0.7 − − V

DDD

LOW level output voltage IOL= 0.10 mA − − 0.4 V

1996 May 06 21

Philips Semiconductors Product specification

)

R

Iref

------------------

=

---

=

)

R

Iref

------------------

×=

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Serial port

SENABLE:
t

su

t

h

t

pm

SDATA: PIN 59
t

su

t

h

SCLOCK: PIN 60
f

SCL

δ duty factor 30 50 70 %

Notes

PIN 61

set-up time with respect to the rising

46 − − ns

edge

hold time 19 − − ns
time between 2 serial port

commands

set-up time with respect to the rising

tIC= internal clock

cycle; note 12

2t

IC

− − µs

22 − − ns

edge

hold time 20 − − ns

clock frequency − − 10 MHz

V

I

1.

ref

ref o(

2. Corresponds to an averaged variation of 7 mV/°C.

3. Including the V

CMSENSE

amplifier input current.

4. Extended voltages are allowed if series resistors are used (see Fig.1).

5. The gain between the pre-driver output current and the IDRIVE current is typically; lower source = 35,
upper source = 50, lower sink = 75 and upper sink = 80.

6. Typical value for external FET such as PHN210.

V

7. I

8. I

I

SPREF

I

source

ref o( )

-----------------­R

IDRIVE

V

2

ref o(

9. Valid if the STOSC capacitance is in the nominal range of 150 to 700 pF.

10. t

BRAKEDELAY

11. t

PORDELAY

≈ 2RC.

≈ C

PORDELAY

, with C

PORDELAY

in µF.

12. Master clock (pin 58) must be running (1 cycle = Tec) − tIC= Tecx (prescaler ratio).

1996 May 06 22

Philips Semiconductors Product specification

UNIT

A

max.

A1A2A3b

p

c E

(1)

e HEL LpQ Zywv θ

REFERENCES

OUTLINE
VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC JEDEC EIAJ

mm

1.60

0.20

0.05

1.45

1.35

0.25

0.27

0.17

0.18

0.12

10.1

9.9

0.5

12.15

11.85

0.69

0.59

1.45

1.05

7
0

o
o

0.12 0.11.0 0.2

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

0.75

0.45

SOT314-2

94-01-07
95-12-19

D

(1) (1)(1)

10.1

9.9

H

D

12.15

11.85

E

Z

1.45

1.05

D

b

p

e

θ

E

A

1

A

L

p

Q

detail X

L

(A )

3

B

16

c

D

H

b

p

E

H

A

2

v M

B

D

Z

D

A

Z

E

e

v M

A

X

1

64

49

48 33

32

17

y

pin 1 index

w M

w M

0 2.5 5 mm

scale

LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm

SOT314-2

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

PACKAGE OUTLINE

TDA5149G

1996 May 06 23

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

SOLDERING
Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

“IC Package Databook”

Reflow soldering

Reflow soldering techniques are suitable for all LQFP
packages.

Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.

Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.

Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.

Wave soldering

Wave soldering is not recommended for LQFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.

(order code 9398 652 90011).

TDA5149G

If wave soldering cannot be avoided, the following
conditions must be observed:

• A double-wave (a turbulent wave with high upward

pressure followed by a smooth laminar wave)
soldering technique should be used.

• The footprint must be at an angle of 45° to the board

direction and must incorporate solder thieves
downstream and at the side corners.

Even with these conditions, do not consider wave
soldering LQFP packages LQFP48 (SOT313-2),
LQFP64 (SOT314-2) or LQFP80 (SOT315-1).

During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.

Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.

A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.

Repairing soldered joints

Fix the component by first soldering two diagonally­opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.

1996 May 06 24

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and

TDA5149G

spindle motor pre-driver combination chip

DEFINITIONS

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

1996 May 06 25

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

NOTES

TDA5149G

1996 May 06 26

Philips Semiconductors Product specification

12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip

NOTES

TDA5149G

1996 May 06 27

Philips Semiconductors – a worldwide company

Argentina: see South America
Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113,

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Middle East: see Italy
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2A Akademika Koroleva str., Office 165, 252148 KIEV,
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United States: 811 East Arques Avenue, SUNNYVALE,

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Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,

Tel. [phone], Fax. [phone]

Internet: http://www.semiconductors.philips.com/ps/
For all other countries apply to: Philips Semiconductors,

Marketing & Sales Communications, Building BE-p,
P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands,
Fax. [phone]

SCDS48 © Philips Electronics N.V. 1996

All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation
or contract, is believed to be accurate and reliable and may be changed without
notice. No liability will be accepted by the publisher for any consequence of its
use. Publication thereof does not convey nor imply any license under patent- or
other industrial or intellectual property rights.

Printed in The Netherlands

397021/1200/01/pp28 Date of release: 1996 May 06
Document order number: 9397 750 00823