ST Manuals

This application note describes the functions and features of STMicroelectronics' supervisor circuits, as well as the combinations of different models. These supervisor circuits effectively reduce the risk of system failure, ensure the safe operation of the system, and are cost-effective.

This document describes a DVD Combo power supply solution using the VIPer53 chip, suitable for devices in the 35W power range. It features high efficiency, low standby power consumption, and cost-effective solutions.

This application note covers 3 DC-DC power supplies to drive high intensity LEDs, namely L6920D boost converter, L4971 buck converter and L6902D buck converter.

This application note presents a reference design for non-isolated flyback converter based on VIPer12AS monolithic device. The circuit can be used to produce multiple outputs, non isolated positive or negative voltage. It is dedicated for building an auxiliary power supply based on the VIPer12AS monolithic device.

This document introduces the VIPer22A application for the DVD player power supply, which has the advantages of low cost, wide input voltage range and low power consumption

This application note describes a 375W evaluation board based on the L6562 Transition- mode Power Factor Correction (PFC) controller (order code: EVAL6562-375W). The board implements a 375W, wide-range mains input, PFC pre-regulator that is suitable for a 300/350W ATX12V power supply unit (PSU).

This application note presents a non isolated buck and buck-boost converter reference board based on the VIPer12AS monolithic device. The circuit can be used to produce a single, non isolated positive or negative voltage. It is dedicated for building an auxiliary power supply based on the VIPer12AS monolithic device with rather low output power required.

This application note details the main features and application advantages of STMicroelectronics’ new synchronous step-down regulator. After describing how the device works and the main features, a step-by-step design section is provided in order to help with the selection of the external components and the evaluation of the losses. The device performances are shown in terms of efficiency and thermal results. In conclusion, some application ideas are proposed.

This document describes the working principle and application methods of LEDs, and presents LED driving application examples using ST DC-DC converters.

The L6926 is a high efficiency monolithic synchronous step-down regulator from STMicroelectronics. It integrates a high voltage MOSFET and a synchronous rectifier and can operate at 100% duty cycle, delivering up to 800mA of continuous output current and regulating the output voltage from 0.6V to VIN. This device is designed using BCDV technology and has a low quiescent current (25μA) and shutdown current (0.2μA), making it very suitable for battery-powered equipment such as PDAs, handheld terminals, DSCs (digital still cameras) and cell phones.

This document describes a SMPS circuit design for LCD monitors or LCD-TVs. The circuit meets global power saving requirements and uses standard thru-hole technology, which can be easily converted to SMT technology.

This document describes the errors that may occur when using an adjustable shunt voltage reference like TL431 in programmable mode and provides a method to calculate the relative error. The document also discusses the impact of inner precision and resistor precision on the overall circuit.

AN1736 is an ST application note that introduces the VIPer22A dual output reference board, which has an input voltage range of 90 to 264 VAC and outputs 5V and 12V at a total output power of 10W.

AN1735 is ST's VIPer22A single output reference board application note, which uses the VIPer22A switch power chip. The input voltage range is 90-264VAC, the output voltage is 12V, the maximum output current is 0.84A, and the maximum output power is 10W.

AN1729 is a technical application note about low cost TV power supply. The application note presents a low cost TV power supply design solution based on the L6565 QR controller, which uses a quasi-resonant flyback converter topology to achieve 1W or less standby power consumption.