ST's wide portfolio of pulse-width modulation (PWM) controllers can support isolated and non-isolated AC-DC and DC-DC switch mode power supplies based on the most popular topologies in both single-ended (such as flyback, forward or quasi-resonant) and double-ended configurations (such as asymmetrical half-bridge) for mid- to high-power SMPS.
Innovative PWM controllers for higher converter efficiency and lower design costs
Our PWM controller offer includes a number of advanced and digital controllers, featuring innovative solutions to optimize converter efficiency in a wide range of load conditions and especially at light loads such as for high voltage start-up.
These PWM controller ICs also integrate a comprehensive set of protections for enhanced robustness and reliability even in an extended temperature range for outdoor applications. The result is a reduction in the number of external components, minimizing converter size and cost.
The industry standard controllers of the UC (voltage mode) and SG (current mode) series are also available for more mainstream SMPS designs.
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.
- STCH02 Offline PWM quasi resonant controller for ultra-low standby power supplies
- L6591 Current mode PWM controller for Asymmetrical Half Bridge converter topology
- UC2844B Current Mode PWM
- UC3844B Current Mode PWM
- UC2843B Current Mode PWM
- STCH03 Offline PWM controller for low standby adapters
- UC3843B Current Mode PWM
- L6565 Quasi-resonant Controller
- UC2842B Current Mode PWM
- UC3842B Current Mode PWM
- L5991 Current Mode PWM
- L6566BH Multi-mode controller for SMPS
- UC3845B Current Mode PWM
- UC2845B Current Mode PWM
- SG3524 Voltage Mode PWM
- SG3525 Voltage Mode PWM
- L6566A Multi-mode controller for SMPS with PFC front-end
- SG2525 Voltage Mode PWM
- L6566B Multi-mode controller for SMPS
- L6668 Smart primary controller
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
Power Supply Design Tool
SMPS design, by topology, by type and by product PFC design with analog and digitial control Supports various PCB configurations 
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 
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
Specify input/output power for each node in the tree Check for consistency Design each individual node