September 2016

DocID029692 Rev 1

1/7

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STEVAL-ILL076V2

18 W wide input range ultra slim flyback converter using

HVLED001A quasi resonant flyback controller and STD8N80K5

Data brief

Features



Input voltage: Vin: 90

– 264 Vrms, f: 45 – 66

Hz



Output power:



18 W at wide input range



40 W at European input range



Output voltage: 56 V ±5 %



High power factor, low THD



No-load: better than 400 mW at 230 Vin



Full load efficiency: greater than 92 %



Short circuit protection with auto restart



EMI: pre-compliant with EN55022 (B) limits



Safety: complies with EN60950



Dimensions: 183 mm x 28 mm x 17 mm



PCB: single sided, 35 µm, FR4, mixed

PTH/SMD



RoHS compliant

Description

This board implements an offline power converter

based on a single stage high-PF flyback topology

using the HVLED001A controller.

A very slim form factor is achieved with

innovative magnetic componentry.

The output voltage is controlled by the primary

side, thus reducing the need for costly opto-

couplers. The HVLED001A PSR precision and

the innovative structure of the transformer makes

for highly accurate output voltage regulation

against load and line changes.

A very high efficiency is obtained and a full set of

protections including output short circuit and input

overvoltage is included.

Conducted EMI is pre-screened and clearances

and creepage distances adhere to EN60950

safety requirements.

Power factor and THD are optimized to be

respectively higher than 0.95 and lower than 10%

at full load over the entire input voltage range.

The main application for this converter is for bus

power supplies in a LED string driver providing 4

kV isolation.