BH6518FS Datasheet, PDF (1/7 Pages) Rohm – 4-channel PWM driver for CD and MD players

Optical disc ICs
BH6518FS
4-channel PWM driver for CD and MD
players
BH6518FS
The BH6518FS is a 4-channel PWM driver for CD and MD player motors and actuators. The power MOSFET in the
output stage assures low power consumption for applications.
!Applications
CD and MD players
!Features
1) Internal 4-ch power MOS H-bridge.
2) Adaptable for PWM input.
3) Built-in charge-pump circuit for step-up.
4) Low ON resistance : 1.2Ω (Typ.).
5) Thermal shutdown circuit.
6) Low power consumption.
7) 32pin SSOP-A package. Compact package.
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Unit
H-bridge supply voltage
VM
9
V
Control circuit supply voltage
VDD
9
V
Predriver supply voltage
VG (2pin)
12
V
Driver output current
Power dissipation
IO
1000
mA
Pd
850^∗
mW
Operating temperature
Topr
−40~+85
°C
Storage temperature
Tstg
−55~+150
°C
∗ PCB(70mm×70mm×1.6mm glass epoxy) mounting.
Reduced by 6.8mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta=25°C)
Parameter
H-bridge supply voltage
Symbol
VM^∗
Min. Typ. Max. Unit
1.6
5.0
5.5
V
Control circuit supply voltage
VDD
2.7
3.0
5.5
V
Predriver supply voltage
VG (2pin) VM+3.0 10
11.5
V
Pulse input frequency
fIN
−
176.4
∗ When the internal charge pump is not used. When it is used : 2.7~5.5V.
200
kHz
1/7