BA3918 Rohm, BA3918 Datasheet

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BA3918

Manufacturer Part Number
BA3918
Description
System power supply for car stereo
Manufacturer
Rohm
Datasheet

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The BA3918 is a single-chip power supply IC for use in car audio systems. One 5.6V output for a microcontroller, three
8.7V outputs, and two outputs interlocked by BACKUP and ACC systems are built in.
FApplications
Car audio systems
FFeatures
1) All outputs except AMP and ANT use a PNP transis-
2) Output current limit circuit prevents damage to the IC
3) Overvoltage protection circuit provides protection
FBlock diagram
242
System power supply for car stereos
BA3918
Regulator ICs
tor with a low saturation voltage.
due to short-circuiting.
against surges from the A
CC
or BACKUP input.
4) Compact 12-pin POWER package allows large pow-
5) Thermal protection circuit prevents heat damage to
er dissipation.
the IC.

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BA3918 Summary of contents

Page 1

... Regulator ICs System power supply for car stereos BA3918 The BA3918 is a single-chip power supply IC for use in car audio systems. One 5.6V output for a microcontroller, three 8.7V outputs, and two outputs interlocked by BACKUP and ACC systems are built in. FApplications Car audio systems ...

Page 2

... Regulator ICs FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) FPin descriptions BA3918 243 ...

Page 3

... Regulator ICs FInput / output circuits 244 BA3918 ...

Page 4

... Regulator ICs FElectrical characteristics (unless otherwise noted 25_C and V BA3918 = 13.2V) CC 245 ...

Page 5

... Regulator ICs FInput / output timing chart 246 BA3918 ...

Page 6

... maximum output current for COM maximum output current for AMP maximum output current for ANT maximum output current for maximum output current for 5.6V 8.7V (22mA (22mA 8.7V 8.7V circuit current (about 5mA whichever is greater BA3918 247 ...

Page 7

... Regulator ICs FApplication example 248 BA3918 ...

Page 8

... 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. FThermal derating characteristic curve (pin 7) and CC DD BA3918 are switched GND is reversed CC 249 ...

Page 9

... Regulator ICs FElectrical characteristic curves FExternal dimensions (Units: mm) 250 BA3918 ...

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