UNISONIC TECHNOLOGIES CO., LTD

USL3531K

Preliminary

CMOS IC

www.unisonic.com.tw

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Copyright © 2016 Unisonic Technologies Co., Ltd

QW-R125-052 .a

NON-ISOLATED BUCK

OFFLINE LED DRIVER

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DESCRIPTION

The UTC USL3531K is a high performance, high precision

and low cost constant current LED driver for non-isolated buck

application. The device operates in critical conduction mode and

is suitable for 85V~265V universal input offline LED lighting. It

operates in critical conduction mode, the output current does not

change with the inductance and LED output voltage.

The UTC USL3531K integrates a 500V power MOSFET. It

can achieve excellent constant current performance with very few

external components, so the system cost and size are minimized.

The UTC USL3531K offers rich protection functions to

improve the system reliability, including LED open circuit

protection, CS resistor short circuit protection and thermal

regulation function.

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FEATURES

* Critical conduction mode operation

* Internal 500V Power MOSFET

* Ultra low operating current

* No auxiliary winding

* ±5% LED output current accuracy

* LED short protection

* LED open protection

* Current sensing resistor short protection

* Thermal regulation function

SOP-8

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ORDERING INFORMATION

Ordering Number

Package

Packing

USL3531KG-S08-R

SOP-8

Tape Reel

USL3531KG-S08-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel

(2) S08: SOP-8

(3) G: Halogen Free and Lead Free

(3)Green Package

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MARKING