SA7411 Datasheet, PDF (3/4 Pages) Silan Microelectronics Joint-stock – 1CH AUDIO POWER AMPLIFIER(1W)

SA7411
FUNCTION DESCRIPTIONS
1. Standby and Mute Function
The PIN2 (STBY/MUTE) controls the amplifier status by three different thresholds:
Ø When Vpin2 is between 0V and 0.4V, the bias of amplifier is off and the amplifier is in standby mode.
Ø When Vpin2 is between 1.2V and 2.0V, the bias of amplifier is on but the gain of the circuit is zero. The
amplifier is in mute mode.
Ø When Vpin2 is between2.7V and 3.3V, the amplifier is play mode.
2. Ripple Rejection
Ground the RF so that there will be no difference in electric potential between the RF and ground.
3. Thermal Protection
The thermal protection circuit operates at a Tj of approximately 145°C. The thermal protection circuit is
reset automatically when the temperature drops.
4. Absence of Short Protection
Make sure that the IC is free of output pin short to ground, output pin short to VCC, IC mount in reverse
direction and load short because there is no such protection in the IC. The IC will be damaged under such
conditions and smoke may be observed.
APPLICATION CIRCUIT
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2005.07.11
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