BA3924 Rohm, BA3924 Datasheet

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BA3924

Manufacturer Part Number
BA3924
Description
System power supply for CD radio cassette player
Manufacturer
Rohm
Datasheet
The BA3924 is a system reference power supply for use in CD radio cassette players. Outputs dedicated to a micropro-
cessor (5.0V), CD player (7.5V), audio system (7.5V), and motor drive (9V) are built in. Also built in is a V
that allows turning ON and OFF the supply voltage by HIGH and LOW levels of the standby pin.
FApplications
CD radio cassette players
FFeatures
1) With outputs dedicated to a microcontroller, CD play-
2) Zero standby current (typ.).
3) Output current limit circuit protects the IC against
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
Power supply for CD radio cassette
players
BA3924
Regulator ICs
er, audio system, and motor drive, the IC is best
suited for CD radio cassette players.
short-circuiting damage.
4) Compact 12-pin package allows large power dissipa-
5) Thermal shutdown circuit protects the IC against
6) V
tion.
thermal damage.
supply voltage by HIGH and LOW levels of the stand-
by pin.
CC
)B output allows turning ON and OFF the power
CC
)B output
141

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BA3924 Summary of contents

Page 1

... BA3924 The BA3924 is a system reference power supply for use in CD radio cassette players. Outputs dedicated to a micropro- cessor (5.0V), CD player (7.5V), audio system (7.5V), and motor drive (9V) are built in. Also built that allows turning ON and OFF the supply voltage by HIGH and LOW levels of the standby pin. ...

Page 2

... Regulator ICs FBlock diagram 142 BA3924 ...

Page 3

... Regulator ICs FPin descriptions BA3924 143 ...

Page 4

... Regulator ICs 144 BA3924 ...

Page 5

... Regulator ICs FElectrical characteristics (unless otherwise noted 25_C 12V) CC BA3924 145 ...

Page 6

... Regulator ICs 146 BA3924 ...

Page 7

... Regulator ICs FMeasurement circuits BA3924 147 ...

Page 8

... Regulator ICs FCircuit operation 148 BA3924 ...

Page 9

... Regulator ICs FApplication example BA3924 149 ...

Page 10

... 0. the maximum circuit current the maximum AUDIO constant output O1 current I is the maximum CD constant output current the maximum COMMON constant O3 output current I is the maximum V )B constant O4 CC output current I is the maximum constant base drive current O5 BA3924 ) P 6 ...

Page 11

... For further protection, the thermal shutdown circuit turns off all out- puts when the IC is overheated, and brings back to nor- mal operation when the temperature is decreased to a certain level. BA3924 151 ...

Page 12

... Regulator ICs FElectrical characteristic curve FExternal dimensions (Units: mm) 152 BA3924 ...

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