DESCRIPTION
The UTC UPSL102 is a high performance offline PSR controller
for LED lighting, which can achieve accurate LED current and low
system cost for an isolated lighting application in a single stage
converter. Consequently, opto-coupler and TL431 could be
eliminated. Constant Current (CC) control is intergrated as shown
in the figure below.
In CC control, the current can be adjusted externally by the
sense resistor RS at CS pin. The chip consumes low start up
current and very low operation current (typical 350μA), it can
achieve high efficiency and low standby power consumption.
The UTC UPSL102 offers comprehensive protection coverage
with auto-recovery features including open loop protection, short
circuit protection, cycle-by-cycle current limiting, VDD over voltage
protection, built-in leading edge blanking, VDD under voltage
lockout (UVLO), etc.
FEATURES
* Primary-side sensing and regulation without TL431 and opto-coupler
* High precision constant current regulation at universal AC input
* Low system cost and high efficiency
* Built-in primary winding inductance compensation
* Programmable CC regulation
* Drivability for BJT switch
* Short circuit protection
* Ultra low start-up current (Typ. 1μA)
* Open loop protection
* Built-in leading edge blanking (LEB)
* Cycle-by-cycle current limiting
* VDD under voltage lockout with hysteresis
* VDD over voltage protection |
