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BA3915B

Rohm
Part Number BA3915B
Manufacturer Rohm
Description System power supply for car stereos
Published Apr 1, 2005
Detailed Description Regulator ICs System power supply for car stereos BA3915B The BA3915B is an one-chip power supply IC for use in car aud...
Datasheet PDF File BA3915B PDF File

BA3915B
BA3915B

Overview
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 operate 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 internally set value, and the result is output to ACCB.
3) All outputs use a PNP transistor with low saturation voltage.
FAbsolute maximum ratings (Ta = 25_C) 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 power dissipation.
FRecommended operating conditions (Ta = 25_C) 226 Regulator ICs FBlock diagram BA3915B 227 Regulator ICs FPin descriptions (Ta = 25_C, BACKUP / ACC = 13.
2V) BA3915B 228 Regulator ICs FInput / output circuits BA3915B 229 Regulator ICs BA3915B 230 Regulator ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, BACKUP / ACC = 13.
2V) BA3915B 231 Regulator ICs BA3915B 232 Regulator ICs FMeasurement circuits BA3915B 233 Regulator ICs BA3915B 234 Regulator ICs BA3915B 235 Regulator ICs FInput / output timing chart BA3915B 236 Regulator ICs FMUTE timing chart BA3915B 237 Regulator ICs FAM / FM output timing chart BA3915B 238 Regulator ICs BA3915B FEstimate of allowable power dissipation Except under transitional conditions, the power dissipation of this IC is 3.
4W per unit at 25_C.
See Fig.
4 for he...


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