TB2934HQ Toshiba, TB2934HQ Datasheet - Page 22

• Manufacturer Part Number: TB2934HQ
• Manufacturer: Toshiba

Specifications of TB2934HQ

• 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, internal standby/mute, BiCD process, power, I2C self-diagnosis, tweeter diagnostics, 34/26 dB gain
• Operating Voltage (v): 9 to 18

Pin10 ripple pin
Voltage=5.6V →
7. Caution for use
Automatic Turn ON Muting
at Turn on diag defeat
Turn on diagnosis mode
Permanent diagnosis mode
Automatic turn on muting
the Pin 10 ripple pin voltage reaches to about the 8VF=5.6V.
command is sent because the internal muting circuit operates.
= 10 uF, Vcc=9 to 18V and Tj = -40 to 150 degrees condition.
When the Turn on diagnosis is enable, the automatic muting period starts after Turn on diag cycle period.
example, temperature, variation and so on.
The comparator detect the voltage between speaker both ends.
If that voltage is larger, this detector judges “output load open”, while, if it is smaller, this detector judges
the “short load”.
But, in case of output shorted to V
surely changed.
Therefore, this system can not present exact information, for example, "Short to VCC" and "Short load"
are showed though output is shorted to Vcc but no short load.
In this case, the result as DET2 shall be dropped or ignored and DET1 is effective as DET1 is prior to
DET2.
Please arrange to read all self-diagnosis functions twice or more and apply judgment in order to avoid false
triggering. <Since the first diagnostic result has low confidence, please diagnose 2 times or more.>
The automatic turn on muting operates from when the turn on write command is sent, it is continued until
During this automatic turn on muting operation, output sound can not appear even if the mute off write
The automatic turn on muting operation period is MIN=xx msec, MAX=zz msec in case of C2 (Pin 10)
This period is in proportion to the value of the C2 so that the characteristic of C2 shall be had a care, for
WRITE DATA
(V
DET circuit 1
CC/
GND short)
AMP
AMP
<Output stage>
Automatic Turn ON Muting
at Turn on diag enable
Figure 11 Automatic Turn on Muting Timing Chart
Possible to play music if the mute off write command is sent
DET circuit 2
at Turn on diag defeat
(short/open)
OUT
OUT
CC
or shorted to GND condition, the voltage between speaker will be
Possible to play music if the mute off write command is sent at Turn on diag enable
22
SP
<RL short/open detector, at TURN-on mode>
AMP
AMP
5 V
Turn ON diagnosis enable
Turn ON diagnosis defeat
S
I = constant current
Comparator
TB2934HQ
2006-06-14