Description

   The AL1663/AL1663R is a high performance single stage Flyback and Buck-boost controller, targeting dimmable LED lighting application. It is a primary side regulation (PSR) controller which can provide accurate constant current (CC) regulation without optocoupler and secondary control circuitry. It is operating at BCM mode and switching at the valley which results in good EMI and efficiency. With working in constant on time, the system achieves high PF and low total harmonic distortion (THD) under universal input voltage.

Features

• Primary Side Regulation without Opto-coupler

• Valley Switching for Low Switching Loss

• Low Start-up Current

• High PF and Low THD

• High Efficiency

• Tight LED Current Variation Range

• Tight Output Open Voltage Variation Range

• Support both PWM Dimming and Analog Dimming

• Internal Protections

   ◾ Under Voltage Lock Out (UVLO)

   ◾ Output Over Voltage Protection (OVP)

   ◾ Output Short Protection (OSP)

   ◾ Over Current Protection (OCP)

   ◾ Thermal Fold-back Protection (TFP)

   ◾ Over Temperature Protection (OTP)

• Low System Cost

• Package: SO-8

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Applications

• General LED Lighting Driver with Dimming Function

• General Purpose Constant Current Source

• LED Backlighting Driver

• Smart LED Lighting