Description

The AL1672 is a high performance single stage Buck convertor, targeting dimmable LED lighting application. It is operating at BCM mode which results in good EMI and efficiency.

The AL1672 can support multiple dimming modes. When a 0.3~2.4V DC signal is applied on APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on APWM pin, the device works at PWM dimming mode.

Features

• 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

• Integrates 600V/4A MOSFET

• Support Both PWM Dimming and Analog Dimming

   ◾ PWM Dimming Range:3% to 100% at 1kHz PWM

      Frequency

   ◾ Analog Dimming and PWM-to-DC Dimming Range:18%

      to 100%

• 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-8EP

• 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

• Smart LED Lighting