TB2912HQ Toshiba, TB2912HQ Datasheet - Page 14

• 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

Output
waveform
Offset detector
output pin 4
Waveform
L.P.F output
Offset detector
sending the write command via I
volume goes down (cliping detector function). After that, it can be judged that the abnormal output
offset has occurred, if the L.P.F. output voltage does not rise above half of pull up voltage.
Vth
Vth
The output from the terminal of pin 4 can be changed from clip detector to offset detector output by
If the L.P.F output voltage has become a half of pull up voltage for a while, firstly the signal output
Figure 9 Hardware Output Offset Detection
4
2
C.
Abnormal offset occured
14
smoothing
L.P.F.
circuit
Detection delay time
Volume down
Volume control circuit
Waiting time for Prevention
System shut down
misjudgement
TB2912HQ
2006-04-28
Judgement