The STEVAL-ISA177V1 evaluation board implements a wide-range converter in flyback non-isolated topology, delivering 0.85 A on a 5 V output based on ST’s new VIPer01 offline high-voltage converter from the VIPerPlus range that integrates an 800 V rugged power MOSFET with PWM current-mode control. The board’s main characteristics are its single layer, small size with minimal BOM, high efficiency and low standby consumption.
Integrating an 800 V avalanche-rugged logic-level MOSFET with PWM current-mode control and multiple protection circuits, the VIPer01 high-voltage converter enables designers to create a simple and ultra-low consumption SMPS in flyback, buck, or buck-boost configuration with a 5 V output. Its integrated high-voltage start-up and sense-FET, error amplifier, and oscillator with jitter minimizes the number of external components required to design a complete application.
The STEVAL-ISA188V1 evaluation board based on the A6986F synchronous step-down switching regulator can deliver up to 1.5 A and, with its 100% duty cycle ability to withstand cold crank events and wide input operating voltage range, represents the ideal choice for battery-powered automotive systems. Synchronous rectification helps achieve higher efficiency at full load as well as application compactness, while high-frequency switching (programmable up to 2 MHz) helps reduce the cost and size of power passive components while remaining outside the AM band. A low-noise mode can be selected to meet the requirements of infotainment applications with forced PWM mode under all load conditions.
ST’s STCH02 is a current-mode controller designed for offline quasi-resonant ZVS flyback converters. The built-in 650 V HV start-up circuit with zero power consumption, combined with the fully integrated blocks for primary side constant current output regulation and the advanced power management make this IC the best choice to build high-efficiency and ultra-low standby consumption power supplies.
The STCS1A constant current LED driver accurately controls the LED forward current in order to achieve good matching of light output. The STEVAL-ILL014V1 evaluation board demonstrates how the STCS1A is capable of controlling the LED current under several application conditions, while also providing useful features that make it suitable for different applications such as advertising signs, automotive interior and exterior lighting, and emergency vehicle warning lights.