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FDA903D-EHT Datasheet(PDF) 33 Page - STMicroelectronics

Part # FDA903D-EHT
Description  1 x 45 W class D digital input automotive power amplifier with ILoad current monitoring, wide voltage operation range for car audio and telematic
PDF  82 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

FDA903D-EHT Datasheet(HTML) 33 Page - STMicroelectronics

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FDA903D
Hardware mute pin
81
9
Hardware mute pin
The pin "HWMute" (pin 30) acts as mute command for the channel. The device is muted
when this pin is low, while it is in play when this pin is high (low/high threshold in Table 5:
Electrical characteristics).
Inside the device, connected to this pin a pull-up current generator puts the device in play if
left floating. An internal clamp limits the Mute pin voltage. If not used, this pin should remain
floating.
To drive the Mute pin to get a hardware mute an external pull-down open drain is needed.
(See Figure 44), RMute must be < 60 kΩ
Figure 44. HWMute pin schematic



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