tb2923ahq TOSHIBA Semiconductor CORPORATION, tb2923ahq Datasheet - Page 6

• Manufacturer Part Number: tb2923ahq
• Description: 51 W ? 4-ch Btl Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

4. Layer Short Detection
The TB2923AHQ 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 TB2923AHQ 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
TB2923AHQ
2009-01-29