LV4924VH 查看數據表（PDF） - ON Semiconductor

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LV4924VH

Class-D Audio power Amplifier Power cell BTL 10W×2ch

ON Semiconductor 

LV4924VH

Thermal protection circuit

This circuit detects the temperature (150°C or more) inside LSI for protection. While this protection circuit is active,

the output Tr is turned OFF on both high- and low-sides, putting the output in the high-impedance state. This operation

is also provided with the hysteresis.

Supply voltage drop protection circuit

To avoid unstable operation at low voltages, this circuit monitors the PVD pin voltage and turns ON the amplifier when

this voltage exceeds the Attack voltage (VD = 7V typ.). In addition, to avoid unstable operation when the PVD pin

voltage has dropped because of certain reasons, the Recover voltage (VD = 6V typ.) is set. Both Attack and Recover

voltages have the hysteresis (about 1V) to prevent continuous ON / OFF operation of the supply voltage drop

protection circuit.

PVD Pin Voltage

Recovery Voltage

Internal

Control

Signal

Output offset detection protection circuit

This circuit is a protection circuit intended to alleviate burn of the loudspeakers when DC outputs to the BTL output for

a certain period or more.

The circuit detects the case in which each BTL input of each channel continues to disagree (for about 300ms), turns

OFF the output Tr on both high- and low-sides, and puts the output in the high-impedance state.

No.A1997-9/15

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