AN3028 Datasheet, PDF (1/37 Pages) M/A-COM Technology Solutions, Inc. – ESD Protection of Broadband GaAs CATV & FTTx Amplifiers

AN3028
Application note
EVLVIP16L-4WFN: 16 V / 4.5 W, 60 kHz non-isolated flyback
demonstration board using the VIPer16LN
Introduction
This document describes a 16 V - 280 mA power supply set in non-isolated flyback topology
with the VIPer16LN, a new offline high-voltage converter by STMicroelectronics.
The features of the device include an 800 V avalanche rugged power section, PWM
operation at 60 kHz with frequency jittering for lower EMI, current limiting with adjustable
setpoint, on-board soft-start, and safe auto-restart after a fault condition.
Moreover, the VIPer16LN can work with or without the auxiliary winding. Operating with the
auxiliary winding, it can attain very low standby consumption. Operating without the auxiliary
winding, the IC is supplied by an internal current generator, thus saving the cost of the
transformer’s auxiliary winding. Both possibilities are discussed in this application note.
The protections available include a thermal shutdown with hysteresis, delayed overload
protection, and open-loop failure protection (available only if the auxiliary winding is used).
Figure 1. EVLVIP16L- 4WFN demonstration board
August 2011
Doc ID 16135 Rev 1
1/37
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