SANYO LB8118M Datasheet

Ordering number: EN*5825

Preliminary

Monolithic Digital IC

LB8118M

Actuator Driver for Portable CD Players

Overview

The LB8118M is an actuator driver IC designed for portable CD players that operate at 2.4 V (two Ni-Cd batteries) or 3.0 V (two dry cells). Because the four-channel driver control outputs are divided into two groups, this device reduces power dissipation considerably during double-speed play.

Functions and Features

H bridge drivers (output dynamic range maximum is about 2 V) on chip for four channels to drive each CD actuator (the focus coil, the tracking coil, the spindle motor, and the sled motor).

Step-up circuit (voltage to be set by an external resistor) on chip that is used to apply voltage to the CD DSP, ASP and microcontroller. Center-tap coil for step-up circuit makes it possible to supply the driver control voltage. (However, the drive Tr, L, C, and Di are all external.)

Oscillator circuits for each converter on chip. (C is external.)

Four-channel driver control output is divided into two groups (the focus/tracking group and the spindle/sled group) for minimum loss at double-speed playback. Highest operating voltage detected in each group is supplied for each 2ch H bridge driver after PMW conversion. The single channel PWM drive without dividing the outputs into two groups is also possible. (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)

The dynamic range of 4-channel H bridge driver output voltage is up to 2 V on the focus and tracking side, and can be set by the Vosat pin on the spindle and sled side. However, if the 4-channel H bridge voltages in the H bridge driver block are the same, the maximum voltage is determined using the Voset pin.

Sled motor driving mode is switchable between step drive mode for lower power dissipation, and normal V-type drive mode. (The other three channels are fixed to V-type.)

In the spindle motor drive circuit, the control gain can be set higher for double-speed playback.

PWM step-down circuit for external power operates when external power (4 V or higher) is supplied. In this function, external power is converted to V In playback mode, step-up voltage for DSP has to be set equal to or lower than V higher enough than V So step-down voltage (V (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)

APC step-up power supply for the laser diode. (Also supports a pre-power supply for the internal bias.) The laser diode is controlled with a voltage of roughly 0.5 V.

Battery pulse charging function on chip. (However, the drive NPN-Tr, and the current feedback C and R are external.)

Battery check comparator on chip.

The system can be started up and stopped by outputs from the microcontroller.

Actuator muting function on chip (for all four channels simultaneously).

Thermal shutdown circuit on chip.

) setting of two types is possible with two pairs of external resistor. (Switching port is provided.)

power supply, and two type voltage setting is possible.

Package Dimensions

unit : mm

3148-QFP44MA

[LB8118M]

, but in charging the battery, it has to be set

SANYO : QIP44MA

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

D3097HA (II) No.5825-1/11

LB8118M

Specifications

Absolute Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit Maximum supply voltage V V

pin input voltage VCDmax 10 V

H bridge output current I Allowable power dissipation Pd max Independent IC 700 mW Operating temperature Topr –20 to +75 Storage temperature Tstg –55 to +150

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Supply voltage V V

pin input voltage V

drop setting voltage when

external voltage input is applied H Bridge limiter voltage V

max 7V

max Maximum per channel is 400 mA. 800 mA

OUT

CC CD

CC(EXT)

lim 0.15 to 2.25 V

1.6 to 5.0 V

3.6 to 9.0 V

3.0 to 5.0 V

Electrical Characteristics atTa=25°C, VCC=3V,VCD=4V

Parameter Symbol Conditions min typ max Unit

[Power Supply Block]

Standby current drain I V

quiescent current drain I

CCO

CC CD

[ASP step-up circuit]

ASP drive output current I V

pin input bias current I

ASP

ASPBASE pin saturation voltage

Load regulation R Line regulation R Minimum off duty D

O ASPDRV

B VASP

O ASPBASEIO

LD ASP LN ASP

min ASP

[APC step-up circuit]

APC drive output current I V

pin input bias current I

APC

APC–VLD

voltage V Load regulation R Line regulation R Minimum off duty D

O APCDRV

B VAPC

APC

LD APC LN APC

min APC

[H Bridge Output Block, PWM Block]

Output saturation voltage V Maximum output voltage V PWM applied offset voltage V

H sat

PWM

PWMOFF

DNB – 1,2 pins output current Io DNB1,2 V Load regulation R Line regulation R

LD PWMVOUT LN PWMVOUT

[Drive Control Block]

CH1 to 4 input voltage range V Input bias current I ASP REF input voltage range V

IN1–4

BIN

ASPR

CH1,2,4 transfer gain G124 CH3 L side transfer gain G3L Negative/positive transfer gain

difference Input dead zone voltage range V

∆G

S/S = [H], the total of VCCand V

S/S = [L], VCCline only 11.0 mA S/S = [L], with no driver input 4.0 mA

= 1 mA 0.2 V

= 3.4 V, L = 30 µH, C = 220 µF 1000 mV/A

ASP

= 3.4 V, L = 30 µH, C = 220 µF 100 mV/V

ASP

– LD 0.5 V

= 3.4 V, L = 30 µH, C = 220 µF 1000 mV/A

APC

= 3.4 V, L = 30 µH, C = 220 µF 100 mV/V

APC

IO= 200 mA, TOP + BOTTOM 0.30 0.45 V

max V

1 2.25 V

OUT

Each VIN=V

ASPREF

= 2.25 V, L = 30 µH 1000 mV/A = 2.25 V, L = 30 µH 100 mV/V

0.5 VCD–0.5 V Each VIN=V Each VIN=V RL=10Ω 7.95 dB

RL=10Ω 10.0 dB

RL=10Ω –1.0 0 +1.0 dB

ASP REF ASP REF

1.2 VCD–1.3 V

RL=10Ω 0 0 30 mV

100 µA

2.0 mA 200 nA

50 %

0.5 mA 200 nA

50 %

0.17 V /60 mA

OUT

2.0 µA

Continued on next page.

No.5825-2/11

LB8118M

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit

[SLED Drive Circuit]

SL REF pin input voltage range

SL REF pin input bias current I Positive side setting offset

voltage between IN4 and SL REF

Dual side step width difference voltage

SL MODE pin high voltage V SL MODE pin low voltage V

[OSC Block]

Maximum oscillation frequency F Input bias current I

[S/S Pin Function]

S/S start voltage V S/S off voltage V

[External Voltage Input Block]

Minimum operating input voltage when external voltage input is applied

EXTDRV pin output current I VZ pin voltage V VZ pin inflow current I V

EXT,VEXT

Input bias current

-CHG pin

EXTBASE pin saturation voltage

[Muting Block]

Mute on voltage V Mute off voltage V

[Pulse Charging Function]

Internal reference voltage V CHG-ON pin ON voltage V CHG-ON Pin OFF voltage V CHG-MON pin

input bias current

CHGDRV pin output current I [H Bridge 1-channel/2-channel drive switch] 1-channel/2-channel switching,

2-channel on voltage 1-channel/2-channel switching,

1-channel on voltage [TSD Block]

Operating temperature T

Temperature hysteresis width ∆T [Battery Check Block] Input bias current I Output saturation voltage V

Note 1: For parameters which have an entry of ‘‘design target value’’ in the ‘‘Conditions’’ column, no measurements are made.

SL REF

B SL REF

off SL REFVSL REF

SL DIF

H SL MODE

L SL MODE

OSC max

B OSC

ON VCC–1.0 V

OFF 0.5 V

EXT

O EXT DRV

B EXTCHG

B EXT

EXTBASEIO

ON MUTE

OFF MUTE

CHG REF

CHG-ON

CHG-OFF

B CHG MON

O CHG DRV

1ch/2ch 1.0 V

1ch/2ch 2.0 V

TSD

BIN

min RIN=1kΩ 3.5 V

Design target value, Note 1 180 Design target value, Note 1 20

IO= 100 µA 0.3 V

= 2.3 V, V

SL REF

= 4.5 V, RIN=1kΩ 3.0 V

EXT

ASP REF

= 2 V –20 +20 mV

= 2 V –20 +25 mV

= 1 mA 0.2 V

ASP REF

+0.1 VCD–1.0 V

2.0 V

–25 +1.0 V

–2.0 µA

200 µA

2.0 V

0.3 V

2.0 V

3.0 mA

200 nA

100 kHz

20 mA

200 nA

1.0 V

200 nA

No.5825-3/11

Pin Assignment

LB8118M

Pd max – Ta

Allowable power dissipation, Pd max – W

Ambient temperature, Ta –°C

1ch/2ch

APC

OSET

No.5825-4/11

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