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PWM controllers

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The ST pulse width modulation (PWM) controller portfolio covers isolated and non-isolated AC-DC and DC-DC switch mode power supplies with the most common converter topologies, including flyback, forward, and quasi-resonant. ST PWM controllers combine integrated protections and optimized light-load behavior to improve converter efficiency, reduce external component count, and lower overall system cost in demanding industrial and consumer applications. The portfolio also includes widely used UC (current-mode) and SG (voltage-mode) PWM controllers for mainstream SMPS designs, giving designers the flexibility to choose from classic architectures to more advanced control strategies.

The ST pulse width modulation (PWM) controller portfolio covers isolated and non-isolated AC-DC and DC-DC switch mode power supplies with the most common converter topologies, including flyback, forward, and quasi-resonant. ST PWM controllers combine integrated protections and optimized light-load behavior to improve converter efficiency, reduce external component count, and lower overall system cost in demanding industrial and consumer applications. The portfolio also includes widely used UC (current-mode) and SG (voltage-mode) PWM controllers for mainstream SMPS designs, giving designers the flexibility to choose from classic architectures to more advanced control strategies.

Applications

ST PWM controllers support efficient, protected, and optimized AC-DC and DC-DC power conversion across a wide range of load conditions.

Smart chargers and adapters
Smart chargers and adapters
Isolated auxiliary power supply 20-75W
Isolated auxiliary power supply 20-75W
Isolated auxiliary power supply up to 20W
Isolated auxiliary power supply up to 20W
LED / OLED TV
LED / OLED TV
Lighting
Lighting

Product types

Current mode PWM controllers
Controllers optimized for current-mode regulation in a wide range of SMPS designs.
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Voltage mode PWM controllers
Classic voltage-mode controllers for mainstream and cost-sensitive power-supply architectures.
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Quasi-resonant and flyback controllers
Controllers designed for high-efficiency flyback topologies and improved light-load operation.
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Benefits

ST PWM controllers help designers build efficient, robust, and cost-effective power supplies for a wide range of AC-DC and DC-DC applications.

  • Support for a broad range of SMPS topologies
  • Improved converter efficiency across load conditions
  • Optimized light-load and start-up behavior
  • Integrated protections for enhanced robustness
  • Reduced external component count to help lower system cost
  • Flexible options for mainstream and advanced designs
  • Suitable for isolated and non-isolated power conversion
  • Proven control architectures for industrial applications

Featured Products

STACF01A and STACF01B

The STACF01A and STACF01B ICs drive and control active clamp flyback converters with non-complementary driving of the active clamp (high-side, HS) switch.

Compact quasi-resonant PWM controller for ultra-low standby power supplies

The STCH03 features a built-in high-voltage start-up circuit with zero power consumption, fully integrated blocks for primary-side constant-current output regulation and advanced power management, making it the best choice for high efficiency and ultra-low standby consumption power supplies with excellent dynamic performance.

Designed to provide a constant output current (CC) regulation using primary-sensing feedback, the STCH03 reduces BOM costs and simplifies your design as a dedicated current reference IC and current sensor are no longer required.

Moreover, an embedded frequency jitter technique helps reduce EMI noise.

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Supported Devices

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

Choose design tool:

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
Choose type:
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
Choose design tool:

Thermal-electrical Simulators for Components

STPOWER Studio

• Supports long mission profiles
• Provides power loss and temperature graphs
• Helps define heatsink thermal properties

Thermal-electrical Simulators for Components

PCB Thermal Simulator

• Thermal analysis of a PCB from Gerber files.
• Possibility to add heat sources, heat sinks, copper areas and thermal paths.
• Powerful server-side engine for rendering and simulation.
• Thermal results shown graphically via 2D table.

Thermal-electrical Simulators for Components

AC Switches Simulator

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

Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

• Select ratings and application waveforms
• Estimate power losses
• Search and sort suitable devices

Thermal-electrical Simulators for Components

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

Thermal-electrical Simulators for Components

TVS Simulator

• Specify system ratings and surge waveform
• Search and sort suitable devices

Thermal-electrical Simulators for Components

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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Signal Conditioning Design Tool

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

Signal Conditioning Design Tool

Comparators

• Handles most common configurations
• Returns circuit components values
• Provides I/O signal waveforms
• Inverting, Non Inverting, Window

Signal Conditioning Design Tool

Low side Current Sensing

• Returns circuit component values
• Provides current error graphs

Signal Conditioning Design Tool

High side Current Sensing

• Provides current error graphs.
• Help to select the right High side current sensing and shunt devices.
Choose design tool:

NFC/RFID Calculators

NFC Inductance

• Input geometry and substrate properties
• Get antenna impedance

NFC/RFID Calculators

UHF Link Budget

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

NFC/RFID Calculators

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

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