Field Effect Rectifiers

ST field-effect rectifier diodes (FERD) help improve designs with new versions focusing on trade-off upgrades. Field-effect rectifier diodes belong to our STPOWER family.
The design of the FERDs has allowed both a decrease in the voltage drop and a decrease in the leakage current temperature coefficient. As a result, the runaway safety margin is improved and maybe beyond the typical safety margin of Schottky barrier diodes.

Depending on the targeted application and its voltage, developers can now choose the best compromise in terms of forward voltage drop (V_F) and leakage current (I_R):
- ‘U’ very low forward voltage drop (V_F)
- ‘L’ low forward voltage drop (V_F)
- ‘M’ & ‘SM’ medium forward voltage drop with optimized leakage current (I_R)
- ‘H’ & ‘S’ low leakage current at high temperatures (low I_R)

Tools allow designers to quickly find evaluate the field-effect rectifier or Schottky diode that best fits their application using our waveform-driven online Schottky & FERD eTool simulator.

FERD30H100 - 30 A, 100 V device now fits in a DPAK package!
For a given package size, our advanced FERD technology allows better density and more efficiency than Schottky barrier devices. The most recent 60 and 100V devices are available in through-hole as well as PowerFLAT™, D²PAK and DPAK versions. Smaller and more optimized packages allow the design of more compact chargers, adapters and SMPS with less power losses, therefore less heat-sinking.
Check our FERD30H100 package options.

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Getting started with Schottky and FERD eTool

Getting started with Schottky and FERD eTool video

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On-demand webinar | High Efficiency SiC and FERD Rectifiers

15 W 5 V output USB adapter board with STCH03 CC-mode primary sensing switching controller

The STEVAL-SMACH15V1 USB adapter evaluation board features high efficiency, extreme low quiescent current, OVP, UVP, OTP, and hiccup-mode protection.

Based on the STCH03 offline PWM controller for low standby adapters, it provides constant output current (CC) regulation using primary sensing feedback.

To help developers choose the best compromise in terms of forward voltage drop (VF) and leakage current (IR), the design includes our FERD20U50 field-effect rectifier diode (FERD) in a PowerFLAT™ package.

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

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Power Management Design Center

Power Supply Design Tool

• SMPS design, by topology, by type and by product

• PFC design with analog and digitial control

• Supports various PCB configurations

Choose type:

DC/DC

AC/DC

Solar Battery Charger

Power Management Design Center

LED Lighting Design Tool

• Handles AC-DC and DC-DC design in common topologies

• Displays interactive and annotated schematic

• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data

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DC/DC

AC/DC

Power Management Design Center

Digital Power Workbench

• Provides a step-by-step optimized design of power section and control loop

• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Management Design Center

Power Tree Designer

• Specify input/output power for each node in the tree

• Check for consistency

• Design each individual node

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