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160

Regulator ICs

Reference voltage power supply

BA3933

The BA3933 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 7.5V output for audio power supply, 5V output

for microcontrollers, 5V output for radio 5 and 7.5V

outputs for CD players, 9V 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 (Topr = 25C)

1 2 3 4 5 6 7

Regulator ICs 1
Regulator ICs BA3933 2

Indice de contenidos

Pagina 1 - Regulator ICs

160Regulator ICsReference voltage power supplyBA3933The BA3933 is a monolithic reference voltage power supply IC for use in CD radio cassette players.

Pagina 2 - Regulator ICs BA3933

161Regulator ICs BA3933Block diagramPin descriptions

Pagina 3

162Regulator ICs BA3933Input / output circuits

Pagina 4

163Regulator ICs BA3933Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 16.0V)

Pagina 5

164Regulator ICs BA3933Circuit operation(1) Timing chartAUDIO 7.5V, MOTOR 9V, and COM 5V are output re-gardless of MODE SW.RADIO 5V rises when MODE S

Pagina 6

165Regulator ICs BA3933Calculation of PMAX Power consumed by AUDIO 7.5VP1 = (VCC  7.5V)I1 Power consumed by MOTOR 9VP2 = (VCC  9V)I2 Power cons

Pagina 7

External dimensions (Units: mm)166Regulator ICs BA3933Operation notes(1) Operating power supply voltageWhen operating within proper ranges of power

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