BA6780 Datasheet, PDF (1/14 Pages) Rohm – 2-channel driver for CD changers

Optical disc ICs
BA6780 / BA6780FP-Y
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.
zApplications
Changers for CD players and MD players.
zFeatures
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.
zAbsolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
18
V
Logic input voltage
VFIN, VRIN
22
V
BA6780
Power dissipation
Pd
BA6780FP-Y
1.31 ^∗1
1.45 ^∗2
W
Maximum current consumption
Imax
1.4 ^∗3
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.
∗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 Should not exceed Pd or ASO values.
zRecommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Input voltage for Vin
Symbol
Limits
Unit
VCC
7∼16
V
VIN
0∼VCC / 2−1.0
V