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Microchip Technology PD70224 Dual MOSFET-Bridge Rectifier

Microchip Technology PD70224 Dual MOSFET-Bridge Rectifier is a dual pack of MOSFET-based full-bridge rectifiers. The rectifier contains low-Rds 0.16Ω N-channel MOSFETs for much higher overall efficiency and higher output power. This is used in Powered Devices (PDs) for 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 192mV at 0.6A, compared to a standard bridge rectifier that typically presents 2000mV of forward drop.

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 and PoH
  • Integrated 0.16Ohm N-channel MOSFETs for 0.3Ohm total path resistance
  • Power-present indicator signals for identifying 4-pair bridge power
  • Low leakage, < 10µA during detection
  • Wide operating voltage range up to 57V
  • -40°C to +85°C ambient
  • 40 pins, 6mm x 8mm QFN
  • MSL3, RoHS compliant

Applications

  • Power over Ethernet IEEE 802.3bt/at/af
  • Proprietary 4-pair standards, UPoE, and PoH

Block Diagram

Block Diagram - Microchip Technology PD70224 Dual MOSFET-Bridge Rectifier
Opublikowano: 2022-04-14 | Zaktualizowano: 2023-08-31