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153

Regulator ICs

Reference voltage power supply

BA3932

The BA3932 is a monolithic reference voltage power supply IC for use in CD radio cassette players.

Applications

CD radio cassette players, mini-component stereo audio systems

Features

1) With 9.0V output for audio power supply, 5.0V output

for microcontrollers, 5.0 and 8.0V outputs for CD

players, 14.7V output for motor drivers, the IC is best

suited for CD radio cassette players.

2) Precise power supply (5V ± 0.1V) can be obtained by

using external reference voltage input (only AUDIO

output has an internal reference voltage system).

3) Zero standby current. (Typ.)

4) Output current limit circuit protects the IC against

short-circuiting damage.

5) Compact SIP-M12 package allows a large power dis-

sipation (3W: no heat sink).

6) Thermal protection circuit prevents heat damage to

the IC.

Absolute maximum ratings (Ta = 25C)

Recommended operating conditions

1 2 3 4 5 6 7

Regulator ICs 1
Regulator ICs BA3932 2

Indice de contenidos

Pagina 1 - Regulator ICs

153Regulator ICsReference voltage power supplyBA3932The BA3932 is a monolithic reference voltage power supply IC for use in CD radio cassette players.

Pagina 2 - Regulator ICs BA3932

154Regulator ICs BA3932Block diagramPin descriptions

Pagina 3

155Regulator ICs BA3932Input / output circuits

Pagina 4

156Regulator ICs BA3932Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 16.0V)

Pagina 5

157Regulator ICs BA3932Circuit operation(1) Timing chartAUDIO 9V, MOTOR 14.7V, and COM 5V are output re-gardless of MODE SW.RADIO 5V rises when MODE

Pagina 6

158Regulator ICs BA3932Calculation of PMAXS Power consumed by AUDIO 9VP1 = (VCC – 9.0V)I1S Power consumed by MOTOR 14.7VP2 = (VCC – 14.7V)I2S Power

Pagina 7

159Regulator ICs BA3932(5) Reference voltageBecause output voltage is dependent on the input refer-ence voltage, unstable input results in output wave

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