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PDF BA6780FP-Y Data sheet ( Hoja de datos )
| Número de pieza | BA6780FP-Y | |
| Descripción | 2-channel driver for CD changers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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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
BA6780
Power dissipation
BA6780FP-Y
Maximum current consumption
VFIN, VRIN
Pd
Imax
22
1.31 ∗1
1.45 ∗2
1.4 ∗3
V
W
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
VCC
VIN
Limits
7∼16
0∼VCC / 2−1.0
Unit
V
V
1 page  
Optical disc ICs
Pin function
Output
(reversible driver)
Output
(governor)
Equivalent circuit
VCC
BA6780 / BA6780FP-Y
10k
pin8, 9
( pin11, 13 )
VEE
VCC
10k
pin10, 11
( pin14, 16 )
Load current detector
signal output
(governor)
VEE
VCC
pin4
( pin6 )
1k
VEE
VEE
5 Page 
Optical disc ICs
BA6780FP-Y
VEE
25 24 23 22 21 20
VIN
1/2
GOVERNOR DRIVER
FWD/REV CONTROLLER
THERMAL
SHUT DOWN
VEE
REVERSIBLE DRIVER
FWD/REV CONTROLLER
VIN IOUT
1 23456
VEE
µ-COM
BA6780 / BA6780FP-Y
RF-500TB
M
VEE
VEE
Rdet=0.6Ω
19 18 17 16 15 14
VEE
VEE
10k
10k DRIVE BUFFER
10k
10k
10k 10k
10k 3.2k
10k
Vref
Vref
10k 10k
Vref
10k
Vref
Vref
VCC
VEE
40k 40k
20k
VEE
Vref
7
17.1k
VEE
VCC
Vconst
89
10
VEE
Rreset
VEE
DRIVE BUFFER
11 12 13
M
VDD
GND
VDD
Fig.4
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet BA6780FP-Y.PDF ] | |
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