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.
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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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L6591
Current mode PWM controller for Asymmetrical Half Bridge converter topology
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UC2844B
Current Mode PWM
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UC3844B
Current Mode PWM
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UC2843B
Current Mode PWM
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STCH03
Offline PWM controller for low standby adapters
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UC3843B
Current Mode PWM
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STNRG328A
Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
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STNRG288A
Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
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L6565
Quasi-resonant Controller
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UC2842B
Current Mode PWM
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UC3842B
Current Mode PWM
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L5991
Current Mode PWM
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L6566BH
Multi-mode controller for SMPS
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UC3845B
Current Mode PWM
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UC2845B
Current Mode PWM
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STNRG388A
Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
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SG3524
Voltage Mode PWM
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SG3525
Voltage Mode PWM
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L6566A
Multi-mode controller for SMPS with PFC front-end
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SG2525
Voltage Mode PWM
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L6566B
Multi-mode controller for SMPS
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L6668
Smart primary controller
