Features

 Transition-mode (quasi-resonant) control of

flyback PFC pre-regulators

 Proprietary input current shaper for minimum

THD of line current

 Control input for isolated feedback and

optocoupler driving

 Output overvoltage protection

 Overload and short-circuit protection

 Low (≤ 60 μA) start-up current and low (≤ 4 ma)

quiescent current

 Digital leading-edge blanking on current sense

 -600/+800 mA totem pole gate driver with

UVLO pull-down and voltage clamp

 SO8 package

Description

The HVLED007 is a current-mode PFC controller

specific for isolated high power factor, flyback

converters operated in transition mode (aka

quasi-resonant operation). Targeting both indoor

and outdoor solid-state lighting applications, it

provides extended temperature range operation

down to -40 °C with guaranteed electrical

specification.

The main feature of this IC is a special circuit

(Input Current Shaper, ICS), that enables High-PF

quasi-resonant flyback converters to draw a

theoretically sinusoidal input current from the

power line, unlike the traditional control.

In practice, with little effort it is possible to achieve

a total distortion of the input current (THD) lower

than 10 at full load and lower than 20 at 30

load over the entire input voltage range.

The IC is provided with a control input intended

for being driven by the phototransistor of an

optocoupler to close a secondary-regulated

isolated control loop. However, with the addition

of a simple external circuitry it can be used to

close a primary-regulated voltage loop as well.

The HVLED007 includes protection features to

handle overload, short-circuit and overvoltage

conditions.

The totem-pole output stage, capable of 600 mA

source and 800 mA sink current, is suitable for big

MOSFET drives which, combined with the other

features, makes the device an excellent low-cost

solution for EN61000-3-2 compliant SMPS up to

100 W.

Applications

Flyback PFC converters for:

 AC-DC LED drivers for domestic, commercial

and industrial lighting

 Street lighting

 EN61000-3-2 compliant SMPS