CATEGORIES

Diodes and rectifiers

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Power supply and inverter designers must comply with standards and market demands for higher efficiency, smaller form factors, and more durable converters. ST has recently added silicon carbide diodes alongside its consolidated range of Schottky and ultrafast bipolar to ensure that designers find the right devices for their application.

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Applications

Diodes and rectifiers for power supplies application
Power Supplies
  • Industrial equipment
  • Consumer/Computer adaptor
  • Lighting
  • Medical
Diodes and rectifiers for photovoltaic application
Photovoltaic
  • Inverters
  • Panel bypass
  • Connection boxes
Diodes and rectifiers for HVAC application
HVAC
  • Compressor drive
  • Electronics actuators
Diodes and rectifiers for automotive power application
Automotive power
  • Drive train
  • On-board chargers/inverters
  • Actuators
  • Lights and light beam
  • Station chargers
Diodes and rectifiers for motor driver application
Motor drive
  • Appliances
  • Pumps
  • Fans
  • Conveyors/Forklifts
  • Power actuation

Types of diodes and rectifiers

Diodes and rectifiers subcategories

When choosing the right device, there are several criteria to consider apart from current and voltage ratings. For example, power Schottky feature very low voltage drop but do not offer high reverse voltage capability. Field effect rectifiers perform better at certain current densities and voltages. Silicon carbide and ultrafast bipolar are most suitable for heavy duty, high-voltage converter applications; the former has virtually no recovery losses, while the latter offers increasingly softer recovery iterations with each new release. Bridge diodes ensure rugged operation, while signal Schottky offer very high accuracy in applications ranging from simple signal paths to RF needs.

The most practical rectifying solutions for low voltage DC output rails. They offer excellent voltage drop trade-off against relatively low reverse voltage capabilities. Their metal-N junction delivers very little capacitance and allows fast switching.
650 to 1200 V devices with no limiting recovery losses, low voltage drop, and useful inrush capability. Their heat transfer capability is well above conventional silicon.
These diodes are in full evolution as converters change from hard to critical modes. The softness of the recovery continues to improve with the AC, RQ series.
The ST 800 V and 1200 V devices are ideal for AC mains front-end rectifier bridges in medium power converters. 30 and 60 A versions are available with appropriate ruggedness for operation in robust industrial and automotive applications.
These rectifiers complement Schottky diodes at lower current densities. Their threshold voltage is lower and the power losses are kept low, which benefits light load operation. FERDs are available from 45 V to the 100 V diode commonly used in Flyback converter chargers
Available various packages from CSP to SOT-23. These devices offer ideal static characteristics and package options for signal routing, as well as low capacitance for RF functions. ST offers a wide product range with varying characteristics for different application requirements.

3 advantages with ST diodes

The ST range of Schottky, SiC, and ultrafast diodes ensures three strategic advantages for fast and easy design.

One

Across-the-board efficiency

  • Wide coverage for SMPS and inverter applications through a wide range of voltages: 15-200 V for Si Power Schottky (STPS) with 175°C Tj.
  • Field effect rectifier diodes (FERD) 40-100 V can replace Schottky diodes in some demanding efficiency designs.
  • 650V and 1200V Si Ultrafast Turbo 2 High Temp (STTH) available, as well as new soft subranges.
  • 650 V and 1200 V extremely fast and efficient SiC diodes Power Schottky (STPSC) with 175°C Tj.
  • Current ratings equally cover the field with a common 1-60 A range and up to 240 A for Ultrafast diodes.
  • All devices designed and manufactured by ST.
Two

Performance packages

ST implements optimized processes for attaching high performance and efficiency dice to packages that improve thermal performance. ST offers a very wide range of industry-standard packages, with recent emphasis on power SMD (30A FERD in a DPAK) and high-voltage SMD (STBR3008G2Y bridge rectifier in HV D2PAK). They target demanding applications from fast-charging adaptors to servers SMPS to electric vehicles chargers.

Three

Proven robustness

Our industrial and automotive grade diodes are manufactured to the same quality standards required for automotive-grade (AEC-Q101) qualification. This proven process robustness across the ST diode range ensures high reliability in electronic circuits based on these devices.

Simulation and finder apps to speed up designs

Rectifier diode simulator in eDesignSuite:

Our Schottky & FERD eTool allows designers to evaluate the field-effect rectifier or Schottky diode that best fits their application using the user waveform-driven inputs. It returns I-V curves according to design conditions and evaluation of the available headroom. It includes a powerful search engine to help SMPS designers and component engineers select the best rectifier or diode for their application.


ST Diode Finder:

This online simulator includes a detailed parametric search engine, a fast view of the most important electrical parameters, and more.

Stay tuned
With our Power Discretes & Modules e-news

New ultrafast and power Schottky diodes deliver high power in 1.1 mm high, extra-slim package

Housed in an extra-slim PSMC package (TO-277A) able to withstand very high operating junction temperatures, this new ultrafast and Schottky diode series minimizes the PCB footprint while bringing the best of thermal efficiency.
In addition to having a low forward voltage drop and avalanche capability, these ultrafast and Schottky barrier rectifiers, which are rated from 30 to 200 V with a current rating from 5 to 12 A, help ensure greater compactness of equipment, with increased power density and efficiency, in a large range of applications including car modules, industrial equipment, telecom power systems and personal electronics.

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.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

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Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
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DC/DC
AC/DC
Solar Battery Charger

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
Choose type:
DC/DC
AC/DC

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 Tree Designer

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AC Switches Simulator

Select ratings and application waveforms
Get junction temperature and blocking voltage graphs
Search and sort suitable devices

Rectifier Diodes Simulator

Select ratings and application waveforms
Estimate power losses
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STPOWER Studio

Supports long mission profiles
Provides power loss and temperature graphs
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Twister Sim

Help select the right ViPOWER Automotive power device
Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
Supports various PCB configurations

TVS Simulator

Specify system ratings and surge waveform
Search and sort suitable devices

Estimate

Build simple schematics and firmware inputs in minutes
Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
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Active Filters

Handles multi-stage-designs and common topologies
Returns circuit component values
Provides gain, phase and group delay graphs
Low Pass, High Pass and Band Pass

Comparators

Handles most common configurations
Returns circuit components values
Provides I/O signal waveforms
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Low side Current Sensing

Returns circuit component values
Provides current error graphs

High side Current Sensing

Provides current error graphs.
Help to select the right High side current sensing and shunt devices.
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NFC Inductance

Input geometry and substrate properties
Get antenna impedance

UHF Link Budget

Enter forward and reverse link characteristics
The tool returns link budget estimate

NFC Tuning Circuit

Enter antenna parameter and matching target
Select the topology of the matching network
The tool returns component values for the desired design targets