TB2905HQ Toshiba, TB2905HQ Datasheet - Page 5

• Manufacturer Part Number: TB2905HQ
• Manufacturer: Toshiba

Specifications of TB2905HQ

• No. Of Channels: 4
• Package: HZIP 25-P-1.00F
• Recommended Vcc (v): 13.2
• Rl=2 Ohm: 80W x 4
• Rl=4 Ohm: 50W x 4
• Rl=8 Ohm: -
• Features/built-in Functions: 4 BTL channels, standby switch, mute, BiCD process, Class-KB high efficiency
• Operating Voltage (v): 9 to 18

Voltage at point A
Voltage at point B
(output of pin 25)
V
(LPF output)
ref
Output DC
voltage (+)
4. Offset Detection Function
Electrical
volume
GND
GND
GND
leakage or other reasons.
Pin 25 can be used to detect an offset voltage that may appear on an output pin due to input capacitor
Capacitor leakage
or short-circuit
V
ref/2
R
Figure 6 Example application and detection mechanism
S1
V
bias
R
S2
+
−
25
5
A
V
5 V
smoothing
L.P.F.
circuit
Output offset voltage
(upon input capacitor leakage or short-circuit)
B
Output DC voltage (+) (for RS1)
V
Output DC voltage (−) (for RS2)
CC/2
To microcontroller The
microcontroller shuts down the
system if the output is lower than
the specified voltage.
Time
Time
Time
(normal DC voltage)
Offset detection threshold
(RS1 detection)
V
(normal DC voltage)
Offset detection threshold
(RS2 detection)
CC/2
TB2905HQ
2005-08-17