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AN4164 Datasheet(PDF) 1 Page - STMicroelectronics

Part # AN4164
Description  This document describes a 12 V-350 mA power supply set in non-isolated flyback topology
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4164 Datasheet(HTML) 1 Page - STMicroelectronics

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February 2013
Doc ID 023660 Rev 1
1/38
AN4164
Application note
STEVAL-ISA113V1: 12 V/4 W, 115 kHz non-isolated flyback
By Mirko Sciortino
Introduction
This document describes a 12 V-350 mA power supply set in non-isolated flyback topology
with the new VIPer06 offline high voltage converter by STMicroelectronics.
The features of the device are:
■ 800 V avalanche rugged power section
■ PWM operation at 115 kHz with frequency jittering for lower EMI
■ Limiting current with adjustable set point
■ Onboard soft-start
■ Safe auto-restart after a fault condition (overload, short-circuit)
■ SSO-10 package
Moreover, the VIPER06 does not require a biasing circuit to operate because the IC can be
supplied by an internal current generator, therefore saving the cost of the transformers
auxiliary winding (self-biasing). If the device is biased through an auxiliary winding or
through a diode connected to the output (external biasing), it can reach very low standby
consumption (< 50 mW at 265 VAC).
Both cases are treated in the present document.
The available protection features are: thermal shutdown with hysteresis, delayed overload
protection, and open loop failure protection (the last is available only if the IC is externally
biased).
Figure 1.
Demonstration board image
www.st.com


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