Microchip Technology, Inc. IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier PD70224

Description
PD70224 is a dual pack of MOSFET-based full-bridge rectifiers. It contains low-Rds 0.16Ω N-channel MOSFETs for much higher overall efficiency and higher output power, particularly when 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 192 mV at 0.6A, compared to a standard bridge rectifier that typically presents 2000 mV of forward drop. PD70224 IdealBridge™ can support over 1A current, making it the ideal choice not only for modern energy-saving 2-pair applications compliant with IEEE 802.3af and IEEE 802.3at (Type 1 and Type 2), but also 4-pair PDs such IEEE 802.3bt and PoH. In addition, PD70224 can help identify at the physical layer itself whether a 2-pair PSE or a 4-pair PSE is providing power over the cable. It does this by sensing the voltage on the line (un-rectified) side of the pairs. Additional 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 0.16 Ohm N-channel MOSFETs for 0.3 Ohm total path resistance ‘Power-present’ indicator signals for identifying 4-pair bridge power Low leakage, < 10 µA during detection Wide operating voltage range up to 57V -40°C to +85°C ambient 40 pins, 6mm x 8mm QFN MSL3, RoHS compliant
  • IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier - PD70224 - Microchip Technology, Inc.
    Microchip Technology, Inc.
Description
PD70224 is a dual pack of MOSFET-based full-bridge rectifiers. It contains low-Rds 0.16Ω N-channel MOSFETs for much higher overall efficiency and higher output power, particularly when 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 192 mV at 0.6A, compared to a standard bridge rectifier that typically presents 2000 mV of forward drop. PD70224 IdealBridge™ can support over 1A current, making it the ideal choice not only for modern energy-saving 2-pair applications compliant with IEEE 802.3af and IEEE 802.3at (Type 1 and Type 2), but also 4-pair PDs such IEEE 802.3bt and PoH. In addition, PD70224 can help identify at the physical layer itself whether a 2-pair PSE or a 4-pair PSE is providing power over the cable. It does this by sensing the voltage on the line (un-rectified) side of the pairs. Additional 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 0.16 Ohm N-channel MOSFETs for 0.3 Ohm total path resistance ‘Power-present’ indicator signals for identifying 4-pair bridge power Low leakage, < 10 µA during detection Wide operating voltage range up to 57V -40°C to +85°C ambient 40 pins, 6mm x 8mm QFN MSL3, RoHS compliant
Datasheet
Datasheet Summary
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PD70224 is a dual MOSFET-based full-bridge rectifier designed for Power over Ethernet applications, replacing passive diode bridges with active circuitry to reduce forward voltage drop. It integrates 0.16 Ω N-channel MOSFETs, resulting in a total path resistance of 0.32 Ω and a forward drop of 192 mV at 0.6 A. The device supports IEEE 802.3af, 802.3at, and 802.3bt standards, as well as Universal PoE and Power over HDBase-T. It includes on-chip drive circuitry with a charge pump for high-side MOSFETs, power-present detection for 4-pair PSE identification, and a dedicated WA_EN pin for adapter priority. Operating voltage range is up to 57 V, with ambient temperature range from -40 °C to 85 °C. The part is housed in a 40-pin 6 mm × 8 mm VQFN package, is MSL3 rated, and RoHS compliant.

Datasheet Summary
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PD70224 is a dual MOSFET-based full-bridge rectifier designed for Power over Ethernet applications, replacing passive diode bridges with active circuitry to reduce forward voltage drop. It integrates 0.16 Ω N-channel MOSFETs, resulting in a total path resistance of 0.32 Ω and a forward drop of 192 mV at 0.6 A. The device supports IEEE 802.3af, 802.3at, and 802.3bt standards, as well as Universal PoE and Power over HDBase-T. It includes on-chip drive circuitry with a charge pump for high-side MOSFETs, power-present detection for 4-pair PSE identification, and a dedicated WA_EN pin for adapter priority. Operating voltage range is up to 57 V, with ambient temperature range from -40 °C to 85 °C. The part is housed in a 40-pin 6 mm × 8 mm VQFN package, is MSL3 rated, and RoHS compliant.

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IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier - PD70224 - Microchip Technology, Inc.
Microchip Technology, Inc.
Chandler, AZ, United States
IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier
PD70224
IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier PD70224
PD70224 is a dual pack of MOSFET-based full-bridge rectifiers. It contains low-Rds 0.16Ω N-channel MOSFETs for much higher overall efficiency and higher output power, particularly when 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 192 mV at 0.6A, compared to a standard bridge rectifier that typically presents 2000 mV of forward drop. PD70224 IdealBridge™ can support over 1A current, making it the ideal choice not only for modern energy-saving 2-pair applications compliant with IEEE 802.3af and IEEE 802.3at (Type 1 and Type 2), but also 4-pair PDs such IEEE 802.3bt and PoH. In addition, PD70224 can help identify at the physical layer itself whether a 2-pair PSE or a 4-pair PSE is providing power over the cable. It does this by sensing the voltage on the line (un-rectified) side of the pairs. Additional 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 0.16 Ohm N-channel MOSFETs for 0.3 Ohm total path resistance ‘Power-present’ indicator signals for identifying 4-pair bridge power Low leakage, < 10 µA during detection Wide operating voltage range up to 57V -40°C to +85°C ambient 40 pins, 6mm x 8mm QFN MSL3, RoHS compliant

PD70224 is a dual pack of MOSFET-based full-bridge rectifiers. It contains low-Rds 0.16Ω N-channel MOSFETs for much higher overall efficiency and higher output power, particularly when 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 192 mV at 0.6A, compared to a standard bridge rectifier that typically presents 2000 mV of forward drop. PD70224 IdealBridge™ can support over 1A current, making it the ideal choice not only for modern energy-saving 2-pair applications compliant with IEEE 802.3af and IEEE 802.3at (Type 1 and Type 2), but also 4-pair PDs such IEEE 802.3bt and PoH. In addition, PD70224 can help identify at the physical layer itself whether a 2-pair PSE or a 4-pair PSE is providing power over the cable. It does this by sensing the voltage on the line (un-rectified) side of the pairs.

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

Technical Specifications

  Microchip Technology, Inc.
Product Category Metal-Oxide Semiconductor FET (MOSFET)
Product Number PD70224
Product Name IEEE 802.3at / bt / PoH IdealBridge™ dual MOSFET-bridge rectifier
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