TA8220HQ 데이터 시트보기 (PDF) - Toshiba

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TA8220HQ

30W BTL × 2ch Audio Power Amplifier

Toshiba 

TA8220HQ

6. Output to VCC, output to GND detection function (pin(9))

The output short detection terminal of pin(9) has open collector output structure on chip as shown in Fig.6.

In unusual case that output terminal of power amp. is condition of output to VCC or output to GND short, it is

possible to protect all the system of apparatus as well as power IC protection.

In case of being unused this function, use this IC as open−connection on pin(9).

7. External part list and description

Sym− Recommended

bol

Value

Feature

Smaller Than

Recommended

Value

Influence

Larger Than

Recommended

Value

C1

4.7µF

DC blocking

Related to pop noise at VCC→on.

Related to pop noise at VCC→on.

C2

47µF

Feedback

condenser

Determination of low cut−off frequency

C2 = 1

2π ⋅ fL ⋅ Rf

Time constant is

C3

220µF

Ripple reduction small at VCC→on

or off.

Time constant is

large at VCC→on

or off.

C4

0.12µF

Oscillation

prevention

Made liable to

oscillate.

Oscillation

allowance

For filtering power supply hum and

ripple.

C5

1000µF

Ripple filter

Large at using AC rectified power

supply.

Small at using DC power supply.

C6

1000pF

Oscillation

prevention

Oscillation allowance improved.

Noise reduction

Remarks

Related to gain.

Refer to item 4.

Refer to item 3.

Refer to item 3.

6

2006-04-28

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