ST Manuals

This document introduces resonant and quasi-resonant converters which have been developed and proposed as a solution to the difficulties of square-wave converters. Quasi-resonant converters use a tank circuit to create a zero-voltage or zero-current condition for the power switch to turn on or off. Quasi-resonant converters can be classified as Zero-Voltage Switching turn-on (ZVS) or Zero-Current Switching turn-off (ZCS) converters. In ZVS converters, the power switch is dynamically connected in parallel to the tank circuit, and the superposition of the resonant voltage and the DC input voltage generates the zero-voltage condition for the switch to turn on. Conversely, in ZCS converters, the power switch is connected in series to the tank circuit, and the superposition of the resonant current and the normal current flow generates the zero-current condition for the switch to turn off.

This document describes the features and characteristics of VIPer100A-E, as well as the implementation and results of a power supply that delivers over 100W for different voltage ranges using a voltage doubler.

This document introduces the application range and features of viper20 products

This paper presents the operation principle of resonant converters and the two major types. Resonant converters can control the output voltage by changing the frequency, thereby reducing switching losses and electromagnetic interference.

LNBP is the integrated solution for supplying/interfacing satellite LNB modules. It gives good performances in a simple and economical way, with a minimum use of external components. It is comprised of functions that realize LNB supplying/interfacing in accordance to the international standards.

This application note explains how to use the TSM102 in an SMPS-type battery charger which features: voltage control, current control, low battery detection and end of charge detection.

How to use the TSM101 integrated circuit with a switching mode power supply (SMPS) to realize a battery charger

The VIPer20ADIP-E is a current mode PWM with a 700 V avalanche rugged Power MOSFET. It can provide an output of 10 W power capability for wide range input, or 20 W for single input voltage range.

Introduces the current limitation functions of the two advanced PWM controllers L5991 and L5993 of ST, including pulse-by-pulse current limitation and current limitation mode. And gives a simple solution

This application note describes how to design a wide range PFC circuit.

The L4973 family is a 3.5A monolithic step-down dc-dc converter, available in POWERDIP18( 12+3+3) and SO20L (12+4+4) plastic packages. The operating input supply voltage range is from 8V to 55V, and the output ranges from 3.3V (L4973D3.3) and 5.1V(L4973D5.1) to 40V. Other regulated outputs below 3.3V are also possible (See Application Note AN938). Using two L4973D is possible to deliver up to 7A with a good sharing between the two sections or a re- dundant 3.5A. The two devices work at a switching frequency of 200kHz. At Vcc = 24V, Vo = 5.1V at 7A the efficiency is 87%. At 3.5A output, the efficiency is 90%.

This is an application note that describes the design of a 90W monitor power supply, including input/output parameters, switching frequency, target efficiency and maximum input power.

This document describes a solution for off-line switch mode power supply (SMPS) using VIPer100-E. The VIPer100-E is a current mode PWM with a 620V / 2.5Ω power switch, capable of withstanding avalanche current during normal operation. This solution is suitable for many applications such as VCRs, TV sets, satellite receivers or decoders, providing customers with a simpler design phase and reduced component count.