BA3915B Rohm, BA3915B Datasheet

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BA3915B

Manufacturer Part Number
BA3915B
Description
System power supply for car stereo
Manufacturer
Rohm
Datasheet
The BA3915B is an one-chip power supply IC for use in car audio systems. The IC has seven output systems : one 5V
output (V
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,
2) ACC voltage is monitored, compared with the inter-
3) All outputs use a PNP transistor with low saturation
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
226
System power supply for car stereos
BA3915B
Regulator ICs
compared with the internally set values; one-shot
pulses are output to MUTE, which synchronizes with
the rising and falling of the STANDBY input.
nally set value, and the result is output to ACCB.
voltage.
DD
), four 8.5V outputs (COM, FM, AM, AR), and two high-side switch outputs (ANT, AMP). The 5V outputs oper-
4) Output current limit circuit prevents damage to the IC
5) Overvoltage protection circuit provides protection
6) Compact 16-pin POWER package allows large pow-
due to short-circuiting.
against surges from the ACC or BACKUP input.
er dissipation.

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BA3915B Summary of contents

Page 1

... 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 (V ), four 8.5V outputs (COM, FM, AM, AR), and two high-side switch outputs (ANT, AMP). The 5V outputs oper- DD ate all the time if only the BCAD input is provided ...

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... Regulator ICs FBlock diagram BA3915B 227 ...

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... Regulator ICs FPin descriptions (Ta = 25_C, BACKUP / ACC = 13.2V) 228 BA3915B ...

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... Regulator ICs FInput / output circuits BA3915B 229 ...

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... Regulator ICs 230 BA3915B ...

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... Regulator ICs FElectrical characteristics (unless otherwise noted 25_C, BACKUP / ACC = 13.2V) BA3915B 231 ...

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... Regulator ICs 232 BA3915B ...

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... Regulator ICs FMeasurement circuits BA3915B 233 ...

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... Regulator ICs 234 BA3915B ...

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... Regulator ICs BA3915B 235 ...

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... Regulator ICs FInput / output timing chart 236 BA3915B ...

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... Regulator ICs FMUTE timing chart BA3915B 237 ...

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... Regulator ICs FAM / FM output timing chart 238 BA3915B ...

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... S Power consumed by FM 8.5V S Power consumed by AM 8.5V S Power consumed by AR 8.5V S Power consumed by ANT S Power consumed by AMP S Power consumed internally by each circuit whichever is larger MAX (80mA 5.0V 8.5V 8.5V 8.5V 8.5V (0.6V 10 (0.6V 10 circuit current (about 10mA BA3915B / 239 ...

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... Make sure to arrange the ground traces in a pat- tern that prevents mutual interference. (11) We recommend installing a bypass line in your ap- plication if there is a mode where potential difference be- tween each output and input (V from the normal state. (pin DD BA3915B (considered as short mode). are switched GND is reversed CC ...

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... Regulator ICs FElectrical characteristic curves FExternal dimensions (Units: mm) BA3915B 241 ...

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