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In a typical AC-DC switch mode power supply (SMPS), the AC mains is rectified and filtered to feed a power factor correction (PFC) stage. Then, by means of high-frequency modulation techniques – sometimes in excess of 1 MHz to reduce size of transformers and inductors – it is then delivered to a DC load with the desired voltage and current ratings.

To find the best solution for their applications, designers have to choose the best power topology – fly-back, buck, or quasi-resonant – or the implementation – based on highly integrated converters or with discrete power switches and controllers – or even decide to use an advanced digital implementation. Whatever their choice, the right semiconductor products are key to meeting their specific design targets.

ST’s broad product portfolio includes highly-integrated AC-DC converters and controllers, silicon and silicon carbide (SiC) power MOSFETs and rectifiers, IGBTs, protection ICs and specifically designed digital controllers and STM32 microcontrollers. We also provide a comprehensive range of hardware and software evaluation and development tools including our eDesignSuite that helps engineers design high efficiency power supplies and converters.

Buck and Buck-Boost Converter
Buck and Buck-Boost Converter
Off-line converters based on buck, or step-down, and buck-boost, or step-down/up, topologies convert the mains to a regulated DC output...
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Flyback Converter
Flyback Converter
In its various implementations including primary side and secondary side regulation, fixed switching frequency or quasi resonant operation...
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Forward Converter
Forward Converter
The single-switch forward converter represents a valid alternative to the single-switch flyback topology in isolated, off-line, step-down...
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LLC Resonant Converter
LLC Resonant Converter
The LLC converter is a resonant inverter with three reactive elements where the DC input voltage is turned into a square wave by a switch...
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PFC Converter - Single Phase Input
PFC Converter - Single Phase Input
Power Factor Correction is a technique of shaping input current to be as sinusoidal as possible to reduce harmonic distortion and associated...
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PFC Converter - Three Phase Input
PFC Converter - Three Phase Input
Power Factor Correction is a technique of shaping input current to be as sinusoidal as possible to reduce harmonic distortion and associated...
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PS ZVS FB  Converter
PS ZVS FB Converter
In a phase-shifting, zero voltage switching full-bridge converter, the two legs of the full-bridge are switched with two square waves whose...
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Two Switch Flyback Converter
Two Switch Flyback Converter
In a two-switch flyback topology, a high-side power MOSFET – placed between the input voltage rail and the transformer – and snubber...
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Two Switch Forward Converter
Two Switch Forward Converter
In a two-transistor forward the two transistors of the primary are switched on and power is transferred to the secondary winding of the transformer and...
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Technical Documentation

    • Description Version Size Action
      AN5316
      35 W wide input range flyback converter using HVLED001B quasi resonant Flyback controller and STF10LN80K5
      1.0
      2.8 MB
      PDF
      AN5316

      35 W wide input range flyback converter using HVLED001B quasi resonant Flyback controller and STF10LN80K5