TB2932HQ 데이터 시트보기 (PDF) - Toshiba

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TB2932HQ

Maximum Power 49 W BTL × 4-ch Audio Power IC

Toshiba 

TB2932HQ

Description for turn on diagnosis

This IC can determine whether the conditions listed below occur or not at turn ON:

-Short to GND

-Short to VCC

-Output to output short

-Speaker open

As first “switch on”, the write data is sent to “turn ON” the IC.

If the turn on diagnostic is activated at this time, the write data, with the diagnostic cycle byte: IB1

D6 set at 1, is sent at the same time

The result of self diagnosis can be obtained from the read data sent after the turn on diagnostic

data permitted time, as below Figure3:

WRITE DATA

READ DATA

Pin10

ripple

voltage

Turn On diagnostic DATA

Turn On diagnostic

permitted time

acquisition time (80 ms typ.)

Permanent diagnostic

enable

Permanent diagnostic

DATA permitted time

FAULT

event

READ DATA

Figure 2 Diagnosis Timing Chart

WRITE DATA

Set the

diagnostic

l

Pin10

ripple

voltage

READ DATA

READ DATA

WRITE DATA

To become standby off

(turning or power ON)

Turn On diagnostic Turn On diagnostic

acquisition time

between On and Off time

(80 ms typ.)

(100 ms typ.)

Figure 3 Number of Times Turn ON Diagnosis Timing Chart

8

2009-02-02

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