UNISONIC TECHNOLOGIES CO., LTD

UPSL102

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2014 Unisonic Technologies Co., Ltd

QW-R125-028.c

HIGH PRECISION CC

PRIMARY-SIDE LED

CONTROLLER



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

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

lockout (UVLO), etc.



FEATURES

SOT-25

4

5

3

2

1

* 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



ORDERING INFORMATION

Ordering Number

Package

Packing

UPSL102G-AF5-R

SOT-25

Tape Reel

UPSL102G-AF5-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel

(2) AF5: SOT-25

(3) G: Halogen Free and Lead Free

(3)Green Package