TB2932HQ 데이터 시트보기 (PDF) - Toshiba

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TB2932HQ

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

Toshiba 

TB2932HQ

Multiple faults

The self diagnosis shows as below tables when there are multi fault connection for the audio

outputs.

At Turning ON:

S.GND (out+)

S.GND (out−)

S.VCC

Out to Out.S

Open L

S.GND (out+)

S.GND

S.GND (out−)

S.GND

S.GND

S.VCC

SVCC+S.Load

S.Load

S.VCC

Out to Out. S

S.GND

S.GND

S.VCC

S.Load

Open L

S.GND + No open

S.GND + No open

S.VCC + S.Load +

open or No open

S.Load + No open

Open

At Permanent:

S.GND (out+)

S.GND (out−)

S.VCC

Out to Out.S

Open L

S.GND (out+)

S.GND

S.GND (out−)

S.GND

S.GND

S.VCC

S.LOAD or

S.VCC

(Note 10)

S.GND or S.VCC

(Note 10)

Out to Out. S

S.GND

S.GND

S.VCC

S.VCC

S.Load + S.GND

Open L

S.GND

(Note 9)

S.GND

(Note 9)

S.VCC

(Note 9)

N/A

Normal

Note 9: If the DC offset detection mode is ON, the information which the DC offset is appeared is added.

Note10: The chance which they can read this exact information is only one time although in case of other

diagnosis, the more times sending read command, the higher the confidence of the result.

For example,

a) ch1+ is connected to GND

b) ch1− is connected to VCC

c) They can read or get the “Short to GND” information when the uP send the Read command.

d) Next, however, they can not get the “Short to GND” or “Short to VCC” information when the uP

send the Read command again.

Note 11: Please arrange to read all self-diagnosis functions twice or more and apply judgment in order to

avoid false triggering.

Explanation of I2C bus commands

Below the “ADDRESS BYTE”, presently the address byte is fixed at 216 dec = D8hex = 101100xbin.

- Address Selection is D8hexa:

A7

Address bit

1

A6

Address bit

1

A5

Address bit

0

A4

Address bit

1

A3

Address bit

1

A2

Address bit

0

A1

Address bit

0

A0 (R/W)

Read/Write bit

X

X: 0 = Write instruction to device; 1 = Read instruction to device

15

2009-02-02

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