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PD70224 - Dual MOSFET-Based Bridge Rectifier

Description

4 1.1.

Purpose of Charge Pump5 1.2.

2.

Features

  • Active circuit with low forward-drop to replace dissipative passive diode bridges.
  • Self-contained drive circuitry for MOSFETs.
  • Designed to support IEEE 802.3af/at/bt, Universal PoE (UPOE), and Power over HDBase-T (PoH).
  • Integrated 0.16 Ω N-Channel MOSFETs for 0.32 Ω total path resistance.
  • “Power present” indicator signals for identifying 4-pair bridge power.
  • Dedicated pin to implement adapter priority.
  • Low leakage,.

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Datasheet preview – PD70224

Datasheet Details

Part number PD70224
Manufacturer Microchip Technology
File Size 1.86 MB
Description Dual MOSFET-Based Bridge Rectifier
Datasheet download datasheet PD70224 Datasheet
Additional preview pages of the PD70224 datasheet.

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Full PDF Text Transcription

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PD70224 IdealBridge™ Dual MOSFET-Based Bridge Rectifier Introduction PD70224 is a dual pack of MOSFET-based full-bridge rectifiers. It contains low-RDS 0.16 Ω N-channel MOSFETs for much higher overall efficiency and higher output power, particularly when used in Powered Devices for Power over Ethernet (PoE) applications. The entire drive circuitry for driving the MOSFETs is on-chip, including a charge pump for driving the high-side N-channel MOSFETs. The total forward drop (bridge offset) introduced by the IdealBridge™ rectifier is only 192 mV at 0.6 A, compared to a standard bridge rectifier that typically presents 2000 mV of forward drop. PD70224 IdealBridge™ can support over 2 A current, making it the ideal choice for IEEE®802.3bt (Type 3 and Type 4), IEEE 802.3at and IEEE 802.
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