TB2923HQ Toshiba, TB2923HQ Datasheet - Page 6

• Manufacturer Part Number: TB2923HQ
• Manufacturer: Toshiba

Specifications of TB2923HQ

• 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, low-RON BiCD process, DC offset detection
• Operating Voltage (v): 9 to 18

4. Layer Short Detection
The TB2923HQ may be properly connected to a load such as a 4-Ω speaker, but one of the speaker lines may
be shorted to ground through a low-impedance path. The TB2923HQ can detect such a condition.
As is the case with output DC offset detection, pin 25 is also activated when there is a short on one of the
speaker lines as shown above. The detection impedance is 2.5 Ω (typ.).
This feature allows detection of a short-circuit through a low-impedance path other than the speaker
impedance. It helps to avoid speaker damage in case of anomalous system conditions and improve system
reliability.
The negative (−) speaker connection is shorted to ground
through a low-impedance path due to some irregularities.
IC
Figure 6 Layer Short
V
CC
GND
6
out
out
SP = 4 Ω
TB2923HQ
2006-11-30