BA3915B Datasheet, PDF (1/16 Pages) Rohm – System power supply for car stereos

Regulator ICs
System power supply for car stereos
BA3915B
The BA3915B is an one-chip power supply IC for use in car audio systems. The IC has seven output systems : one 5V
output (VDD), four 8.5V outputs (COM, FM, AM, AR), and two high-side switch outputs (ANT, AMP). The 5V outputs oper-
ate all the time if only the BCAD input is provided. The other outputs operate with BACKUP and ACC inputs, and their
ON / OFF is controlled by the STANDBY and MODE inputs.
FApplications
Car audio systems
FFeatures
1) ACC and BACKUP voltages are monitored,
compared with the internally set values; one-shot
pulses are output to MUTE, which synchronizes with
the rising and falling of the STANDBY input.
2) ACC voltage is monitored, compared with the inter-
nally set value, and the result is output to ACCB.
3) All outputs use a PNP transistor with low saturation
voltage.
4) Output current limit circuit prevents damage to the IC
due to short-circuiting.
5) Overvoltage protection circuit provides protection
against surges from the ACC or BACKUP input.
6) Compact 16-pin POWER package allows large pow-
er dissipation.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
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