UNISONIC TECHNOLOGIES CO., LTD

USL1601

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 6

Copyright © 2014 Unisonic Technologies Co., Ltd

QW-R125-033.a

CONSTANT CURRENT

CONTROLLER FOR

NON-ISOLATED BUCK LED

DRIVER



DESCRIPTION

The UTC USL1601 is a high precision constant current

non-isolated buck LED driver controller. It can operate under

universal AC input, also can operate 12V~600V DC input. The UTC

USL1601

integrates 600V power MOSFET, so it can use very few

external

components

achieve

excellent

constant

current

performance.

The UTC USL1601 uses high precision current sense circuit and

patent method for constant current control, to achieve high precision output current and excellent line regulation.

The UTC USL1601 operates in inductor current critical mode. The LED current is constant over wide range of

inductance variation and the LED output voltage, so the load regulation is excellent.

The UTC USL1601 operation current is 200µA only, so the auxiliary winding is not needed. It can simplify the

system design and reduce the system cost.

The UTC USL1601 offers rich protection functions, including LED short circuit protection, current sense resistor

short circuit protection and over temperature protection.



FEATURES

* Inductor current critical mode, No need to compensate the

inductance variation

* 600V MOSFET integrated

* ±3% LED current accuracy

* LED short circuit protection

* Up to 93% system efficiency

* Current sense resistor short circuit protection

* Over temperature protection



ORDERING INFORMATION

Ordering Number

Package

Packing

USL1601G-S08-R

SOP-8

Tape Reel



MARKING