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PD69208T4 Datasheet(PDF) 6 Page - Microchip Technology

Part # PD69208T4
Description  PoE PSE Manager
Download  35 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PD69208T4 Datasheet(HTML) 6 Page - Microchip Technology

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1.4
Current Limiter
This circuit continuously monitors the current of powered ports and limits the current to a pre-defined value set by
AF/AT/BT/PoH. When the current value exceeds this specific value, the system starts measuring the elapsed timing.
If this interval is greater than a preset threshold, the port is disconnected.
1.5
Main Power MOSFET
The main power switching FET is used to control PoE current into the load.
1.6
10-Bit ADC
A 10-bit analog to digital converter (ADC) is used to convert analog signals into digital registers for the logic control
module.
1.7
Power on Reset
Power on Reset (PoR) monitors the internal 3.3 V and 5 V DC levels. If this voltage drops below the specific
thresholds, a reset signal is generated and the manager is reset.
1.8
Voltage Regulator
The voltage regulator generates 3.3 V and 5 V for internal circuitry.
1.9
Oscillator
The manager’s clock (CLK) is an internal 8 MHz clock oscillator.
1.10
SPI Communication
The managers use SPI communication in SPI slave mode to communicate with the MCU. Each manager has an
address determined by ADDR0-ADDR3 pins. Addresses 0–11 are supported. The frequency between controller and
manager ICs is 1 MHz.
PD69208T4/PD69204T4/PD69208M
Functional Descriptions
© 2020 Microchip Technology Inc.
Datasheet
DS00003428C-page 6


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