ROHM BA5994FM Datasheet

4-Channel BTL driver

BA5994FM

Dimension (Units:mm)Description

The BA5994FM is a 4-channel BTL driver for an
actuator and motor driver of CD/CD-ROM. (Inputs for
the driver connect to an operational amplifier and it is
compatible with various applications.)
Channel 2&3 include a short-brake function.

Features

1) 4-channel BTL driver

2) Wide dynamic range (4V typical at PreVcc=12V,
PowVcc=5V, RL=8Ω)

3) Built-in thermal shut down circuit

4) Separating Vcc into Pre and Power (Power divides into
Channel1&2 and Channel 3&4) makes for improved
power efficiency, by a lower supply voltage drive

5) Mute operated individually with Channel 4 and Channel 1&2&3

6) All channels are mute in standby mode

7) Suitable for low operation voltage DSP by wide dynamic range
pre operational amplifier.

8) Built-in short-brake circuit (Channel 2&3)

99W139A

HSOP-M28

Applications

CD, CD-ROM

Absolute Maximum Ratings (Ta=25˚C)

Parameter Symbol Limits Unit

Supply voltage
Power dissipation

Output current IOMAX A1
Operating temperature range
Storage temperature rang

*1 On less than 3% (percentage occupied by copper foil), 70mm 70mm, t=1.6mm, glass epoxy mounting.
Derating: 17.6mW/˚C for operation above Ta=25˚C
*2 The output current must not exceed the maximum ASO.

PREVcc, POWVcc

Pd

Topr
Tstg

13.5

*1

2.2

*2

~

-35 +85
~

-55 +150

V

W

˚C
˚C

January, 2000

Recommended Operating Conditions (Ta=25˚C)

Parameter Symbol UnitMin. Typ. Max.

Supply voltage

PREVCC
POWV

CC

PREVCC

V4.5 - 13.2
V4.5 -

Electrical characteristics

(Unless otherwise noted, Ta=25˚C, PreVcc=12V, PowVcc1=5V, PowVcc2=5V, V BIAS=1.65, VRL=8W)

ConditionsParameter Symbol UnitMin. Typ. Max.
Quiescent current
All Channel Standby Current

IQ

IQST3

<Driver block>

Output offset voltage
Maximum output voltage 1

Maximum output voltage 2
Closed loop voltage gain 1
Closed loop voltage gain 2

VOOF
VOM1
VOM2

GVC1
GVC2

<Pre operational amplifier>

Input offset voltage
Input bias current
High level output voltage
Low level output voltage
Output sink current

Output source current

VOFOP

VBOP
VOHOP
VOLOP

ISI

ISO

This product is not designed for protection against radioactive rays. * PowVcc1=PowVcc2=12V

Application circuit

Tray motor

Sled motor

0.1mF

H=ENABLE

12V(for ch3,4)

L=STANDBY

M

M

-

-

70

3.6

7.5
10
16

6

-

9

-

1

300

LEVEL

SHIFT

mA
mA

mV

dB
dB

mV

nA

mA

m

SHIFT

LEVEL

No load
No load (Pre circuit current)

V
V

CH1, 2 VIN=V
CH3, 4 VIN=V

BIAS

BIAS

CH1, 2 VIN=VBIAS 0.5V
CH3, 4 VIN=VBIAS 0.5V

VBIAS=6V

V

VBIAS=6V

V

Output to PreVcc by 50W,VBIAS=6V
Output to GND by 50W,VBIAS=6V

A

10k

10k

10k

10k

10k

CH1,2,3

STANDBY

14

13

10k

10k

12

1
1

10k

10

Vcc

9

8

focus coil

tracking coil

H=ENABLE

L=STANDBY

SHIFT

LEVEL

30

70

14
20

300

0.3

SHIFT

LEVEL

1

-

-

6

-

-

-

20

-

0

4.0
9

12
18

0

-

11

-

-

500

10k

10k

10k

10k

Vcc

STANDBY

CH4

10k

10k

10k

10k

15

16

17

18

19

20

21

1.65V

1.65V

0.1mF

*

*

5V(for ch1,2)

SLED

SB1

SB2

0.1mF

20k

22

23

24

25

26

27

28

10k

20k

10k

Vcc

10k

7

10k

10k

10k

6

5

4

3

2

1

BIAS

FOCUS

DIGITAL SERVO

TRACKING