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PM8805 Datasheet(PDF) 40 Page - STMicroelectronics

Part # PM8805
Description  IEEE 802.3bt PoE-PD interface with embedded dual active bridge
PDF  48 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM8805 Datasheet(HTML) 40 Page - STMicroelectronics

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Thermal aspects
PM8805
40/48
DS12813 Rev 2
5.2
Overtemperature protection
If OTP occurs, the Classification buffers or the hot swap MOSFET are turned off. The PGD
signal is reset (low) and the MPS current is forced off. The VB regulator is also turned off.
The charge pump is kept on, and the control logic of the input bridge is kept active, so that
the conducting MOSFETs are kept on.
When the junction temperature goes below about 130 °C, the converter starts automatically,
without recycling the input voltage and with the internal state stored before OT protection.



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