ICs for Compact Disc/CD-ROM Player

AN8783SB

5

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Thermal protection circuit

Thermal protection operating



160

°C

temperature

Thermal protection hysteresis

∆T

THD



45

°C

width

Reset circuit

Voltage detection reset



0.2



V

hysteresis width

• Design reference data

Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.

s Usage Notes

2. Ch. 3 and ch. 4 are current feedback type drivers. Do not apply voltage directly to PVC3 and PVC4, but apply from

PVC2 through the current feedback detection resistors RS3 and RS4 , respectively. And commonly connect S3 pin

to PVC3 pin and S4 pin to PVC4 pin.

At this time, as an output current flows on the detection resistors RS3 and RS4, use a resistor which has a sufficient

allowable power dissipation.

To set gain for ch. 3 and ch. 4, use the following formula:

| V

× 2.2 kΩ = R

3. Power cut operation

Power cut pins PC1 (for ch. 1, ch. 3, ch. 4) and PC2 (only for ch. 2) are high for mute and low for active.

While ch. 2 is exclusive to a loading motor, ch. 2, ch. 3 and, ch. 4 are driven by the output current from the same

source (PVC2). Therefore, do not use ch. 2 and ch. 3, ch. 4 simultaneously because noise is likely to be put on ch.

3, ch. 4 when ch. 2 is being drived.

4. Appropriate care should be taken on the characteristics.

When changing an external circuit constant on actual use, secure an appropriate margin in consideration of charac-

teristic fluctuation of external parts and our ICs including transient characteristics as well as static ones.

between output pins (load short-circuit). Otherwise, the IC is likely to emit smoke and break down.

RVC2

RS3

RS4

S3

S4

PVC3

PVC4