BA6780 / BA6780FP-Y

Optical disc ICs

2-channel driver for CD changers

BA6780 / BA6780FP-Y

The BA6780 and BA6780FP-Y are 2-channel driver IC for CD changers that inculdes a reversible, variable speed

electronic governor and a reversible driver. On sets that have dual-rail power supplies, the BA6780 and BA6780FP-Y can

be operated from just the negative supply to reduce influence on the positive power supply.

The input uses PWM control, and it is possible to directly input from a microprocessor running off the positive power

supply.

Applications

Changers for CD players and MD players.

Features

1) Output voltage can be freely set using the output voltage setting pin.

2) Internal mute function if the power supply voltage drops.

3) Thermal shutdown function. (Contains hysteresis)

4) PWM input.

5) Settable reference voltage output pin.

6) Wide operating supply voltage.

Absolute maximum ratings (Ta = 25

°C)

Parameter

Symbol

Limits

Unit

Power supply voltage

18

V

Logic input voltage

BA6780

BA6780FP-Y

22

V

Power dissipation

Pd

W

Maximum current consumption

Imax

1.4

A

Operating temperature

Topr

−25∼+75

˚C

Storage temperature

Tstg

−55∼+150

˚C

∗1 When a DIP18 package is used.Reduced by 10.48mW for each increase inTa of 1˚C over 25˚C.

∗3 Should not exceed Pd or ASO values.

∗2 When mounted on a PCB board (70mm

×70mm, t=1.6mm glass epoxy board).

Reduced by 11.6mW for each increase in Ta of 1˚C over 25˚C.

∗3

Recommended operating conditions (Ta = 25

°C)

Parameter

Symbol

Limits

Unit

Power supply voltage

7

∼16

V

Input voltage for Vin

0

V