UNISONIC TECHNOLOGIES CO., LTD

US3602

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 7

Copyright © 2015 Unisonic Technologies Co., Ltd

QW-R502-985.b

HIGH PRECISION PSR

CONSTANT CURRENT

LED DRIVER



DESCRIPTION

The UTC US3602 is a primary side control offline LED lighting

controller. It operates in inductor current DCM mode and can

achieve accurate constant current.

The UTC US3602 integrates 600V power MOSFET and

simplifies the LED lighting system design by eliminating the

secondary side feedback components and the opto-coupler. The

loop

compensation

components

are

also

removed

while

maintaining stability overall operating conditions.

The LED current can be adjusted externally by the sense

resistor RCS at CS pin. The UTC US3602 achieves ±3% accuracy

of LED current along with excellent line regulation and load

regulation.

The UTC US3602 offers comprehensive protection coverage

with auto-recovery features including LED short circuit protection,

LED open circuit protection, Cycle-by-cycle current limiting, OTP,

voltage lockout, etc.



FEATURES

* Built-in 600V Power MOSFET

* ±3% constant current regulation at universal AC input

* Primary side control without TL431 and opto-coupler

* Programmable CC regulation

* Flyback topology in DCM operation

* Low operating current to improve efficiency

* High resistance feedback resistor to improve efficiency

* LED short and open circuit protection

* Cycle-by-cycle current limiting

* Built-in leading edge blanking

* Feedback loop short circuit protection

* Current sense resistor open circuit protection



ORDERING INFORMATION

Ordering Number

Package

Packing

US3602G-S08-R

SOP-8

Tape Reel

(1) R: Tape Reel

(2) S08: SOP-8

(3) G: Halogen Free and Lead Free

US3602G-S08-R

(1)Packing Type

(2)Package Type

(3)Green Package