Features
 Quasi resonant (QR) topology
 Primary side regulation of output voltage
 Direct optocoupler connection for current loop
regulation with feedback disconnection
detection
 800 V high voltage startup
 High power factor and low THD in universal
range
 High efficiency and output stability in wide
voltage and current range
 Extremely low standby power at no load
condition
 Programmable frequency foldback
 Integrated input voltage detection for high
power factor capability and protection
triggering
 Latch-free device guarantee by smart autoreload
timer (ART)
 0-10 and PWM dimming compatible
 Remote control pin

Description
The HVLED001B is an enhanced peak current
mode controller able to control mainly high power
factor (HPF) flyback or buck-boost. Some other
topologies such as buck, boost and SEPIC, can
also be implemented.
Primary side regulation and optocoupler control
can be applied independently on the chip, both
exploiting precise regulation and very low standby
power during no load conditions.
The innovative ST high voltage technology allows
direct connection of the HVLED001B to the input
voltage in order to both start up the device and to
monitor the input voltage, without the need for
external components.
Abnormal conditions like open circuit, output
short-circuit, input over-voltage or under-voltage
and circuit failures like open loop and overcurrent
of the main switch are effectively controlled.
A smart Auto Recover Timer (ART) function is
built in to guarantee an automatic application
recovery, without any loss of reliability.

Applications
 Single-stage LED drivers with high power
factor
 Two-stage LED drivers