UNISONIC TECHNOLOGIES CO., LTD

UPSL104A

Preliminary

CMOS IC

www.unisonic.com.tw

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Copyright © 2016 Unisonic Technologies Co., Ltd

Ver.a

HIGH PRECISION OFF-LINE

LED CONTROLLER

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DESCRIPTION

UTC UPSL104A is a primary side regulation off-line LED

lighting controller which can achieve accurate LED current. It

significantly simplifies LED lighting system design by eliminating

the secondary side feedback circuitry. The device integrates PWM

controller to enhance the performance of discontinuous conduction

mode (DCM) flyback converters.

The LED current (CC control) can be adjusted externally by the

resistor Rs at CS pin. Device operates in PFM in CC mode as well

at large load condition and it operates in PWM with frequency

reduction at light/medium load.

The UTC UPSL104A achieves high precision CV/CC regulation

and high power efficiency. It offers comprehensive protection

coverage with auto-recovery features including Cycle-by-cycle



FEATURES

SOT-26

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* High Precise Constant Current Regulation at Universal AC input

* Primary-side Sensing and Regulation Without TL431 and

Opto-coupler

* Programmable CC Regulation

* Adjustable Constant Current and Output Power Setting

* Built-in Secondary Constant Current Control with Primary Side

Feedback

* Built-in Adaptive Current Peak Regulation

* Built-in Primary winding inductance compensation

* Power on Soft-start

* Built-in Leading Edge Blanking (LEB)

* Cycle-by-Cycle Current Limiting

(UVLO)

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ORDERING INFORMATION

Ordering Number

Package

Packing

UPSL104AG-AG6-R

SOT-26

Tape Reel