TB2912HQ Toshiba, TB2912HQ Datasheet - Page 12

• Manufacturer Part Number: TB2912HQ
• Manufacturer: Toshiba

Specifications of TB2912HQ

• No. Of Channels: 4
• Package: HZIP 25-P-1.00F
• Recommended Vcc (v): 13.2
• Rl=2 Ohm: 70W x 4
• Rl=4 Ohm: 43W x 4
• Rl=8 Ohm: -
• Features/built-in Functions: 4 BTL channels, standby switch, mute, BiCD process, I2C self-diagnosis, tweeter diagnostics, low standby current
• Operating Voltage (v): 9 to 18

Pin10
ripple
voltage
WRITE DATA
(3)
Figure 7 Permanent Diagnosis Timing Chart for Each Short Detection
Turn On diagnostic
acquisition time (80 ms typ.)
Description for permanent diagnosis
or after turning ON:
also when set at 0.
write the data.
Fault. Therefore, it is necessary to obtain 3 or more readings in order to prevent a miss judgment.
For example, the speaker sometimes makes a large counter electro motive force which this IC could
recognize as a fault event.
finished therefore there is no need to send the extra command.
This IC can provide permanent diagnosis under the following conditions, whether they occur before
-Short to GND
-Short to VCC
-Output to output short circuit
-Output offset detection
-Current detection for tweeter open
This permanent diagnosis is available not only with the diagnostic cycle byte: IB1 D6 set at 1 but
Additionally, the signal can be obtained by entering just a read command. It is not necessary to
With permanent diagnosis fault detection, the first read data after fault removal will still show a
Additionally, this permanent diagnosis is automatically on after the turning on diagnosis operation
Turn On diagnostic
DATA permitted time
READ DATA
Permanent diagnostic DATA
permitted time
12
FAULT
event
READ DATA
result faulty
removed
FAULT
READ DATA
result faulty
TB2912HQ
result not faulty
READ DATA
2006-04-28