Rainbow-electronics BA3940A Manuale Utente Scaricare il pdf

192

Regulator ICs

System power supply for CD radio

cassette players

BA3940A

With built-in 9V, 7V, and 5V outputs, the BA3940A system power supply IC is best suited for use in CD radio cassette

players.

Applications

CD radio cassette players

Features

1) One 9V output, two 7V outputs (switched by MODE

SW, only one output is available at the same time)

and one 5V output are built in.

2) Output current limit circuit protects the IC against

short-circuiting damage.

3) Thermal protection circuit prevents heat damage to

the IC.

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

sipation.

Absolute maximum ratings (Ta = 25C)

Recommended operating conditions (Ta = 25C)

1 2 3 4 5 6 7

Regulator ICs 1
Regulator ICs BA3940A 2

Sommario

Pagina 1 - Regulator ICs

192Regulator ICsSystem power supply for CD radio cassette playersBA3940AWith built-in 9V, 7V, and 5V outputs, the BA3940A system power supply IC is be

Pagina 2 - Regulator ICs BA3940A

193Regulator ICs BA3940ABlock diagramPin descriptions

Pagina 3

194Regulator ICs BA3940AInput / output circuits

Pagina 4

195Regulator ICs BA3940AElectrical characteristics (unless otherwise noted, Ta = 25C and VCC = 15V)

Pagina 5

196Regulator ICs BA3940ACircuit operationVo1, Vo2 and Vo4 rise when ST pin is 1.8V. With voltage ap-plied on ST, the Vo2 output turns OFF when MODE i

Pagina 6

197Regulator ICs BA3940AOperation notes(1) Operating power supplyWhen operating within proper ranges of power supplyvoltage and ambient temperature,

Pagina 7

FExternal dimensions (Units: mm)198Regulator ICs BA3940AFThermal derating curveEstimate of allowable power dissipation (PMAX.)S Power consumed by OUT