BA3963 データシートの表示（PDF） - ROHM Semiconductor

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BA3963

System power supply for CD player-equipped audio system

ROHM Semiconductor 

Regulator ICs

FApplication example

BA3963

FOperation notes

(1) Operating power supply voltage

When operating within proper ranges of power supply

voltage and ambient temperature, most circuit functions

are guaranteed. Although the rated values of electrical

characteristics cannot be absolutely guaranteed, char-

acteristic values do not change drastically within the

proper ranges.

(2) Power dissipation (Pd)

Refer to the heat reduction curves (Fig. 5) and the rough

estimation of IC power dissipation given on a separate

page. If power dissipation exceeds the allowable limit,

the functionality of IC will be degraded (such as reduction

of current capacity by increased chip temperature).

Make sure to use the IC within the allowable range of

power dissipation with a sufficient margin.

(3) Preventing oscillation at each output

To stop oscillation of output, make sure to connect a ca-

pacitor having a capacitance of 10µF or greater between

GND and each output pin. Also, the 5V output ripple re-

jection is improved by connecting a capacitor having a

capacitance of 1µF or greater between pins 4 and 6.

When connecting the capacitors, be sure to connect the

polarities correctly. Oscillation of output can occur if ca-

pacitance is susceptible to temperature. We recommend

using a tantalum electrolytic capacitor with minimal

changes in capacitance.

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