Electronic Device And Electronic Circuit

Data of electronic device , PCB Design and electronic circuit

Google
 
Web basicelectronic.blogspot.com

Thursday, April 09, 2009

Snubber Circuit Design


Mosfet RCD Snubber Circuit Design

Design the MOSFET RCD snubber circuit

Push-Pull Snubber Circuit

Mosfet Snubber Circuit in Flyback Converter Circuit

Switch Protection Design - Fast-Recovery Diodes



Labels: , ,

Friday, March 27, 2009

Push-Pull Snubber Circuit

Abstract
The DS3984, DS3988, DS3881, DS3882, DS3992, and DS3994
are cold-cathode fluorescent lamp (CCFL) controllers that use a
push-pull architecture to create the high-voltage AC waveforms
needed to drive the lamps. In a push-pull drive scheme, the
parasitic inductance of the step-up transformer, together with the
parasitic capacitance of the output of the n-channel power
MOSFETs, form a resonant circuit that can create unwanted
voltage spikes. High-voltage spikes can increase the stress on
the power MOSFETs and can also increase the electromagnetic
interference (EMI) created by the system. This application note
describes how to suppress the voltage spikes with a simple
resistor-capacitor (RC) network.

Push-pull drain snubber circuit.


Labels: ,