AL1672 Single-Stage Dimmable Buck Converter with 6

By Diodes Incorporated 89

AL1672 Single-Stage Dimmable Buck Converter with 6

The AL1672 from Diodes Incorporated is a high-performance, single-stage buck converter, targeting dimmable LED lighting applications. It operates at BCM mode, which results in good EMI and efficiency. The AL1672 can support multiple dimming modes. When a 0.3 VDC to 2.4 VDC signal is applied on the APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on the APWM pin, the device works at PWM dimming mode. The AL1672 features low start-up current and low operation current. It integrates multiple protections, including overvoltage, short circuit, overcurrent, and overtemperature protection. It also integrates a 600 V/4 A high-voltage MOSFET. The AL1672 is available in an SO-8EP package.

Features  
  • Highly integrated converter in SO-8EP package:
    • Low BOM cost solution
  • Built-in 600 V/4 A MOSFET
    • Small size and simple circuit design
  • Supports both PWM and analog dimming:
    • Can be dimmed by a PWM signal or a DC voltage
  • SO-8EP package
    • Better thermal performance 
  • High PF and low THD
    • PF > 0.9, THD < 20%
  • Built-in undervoltage lock-out, output open-circuit protection, output overvoltage protection, output short-circuit protection, thermal foldback protection, and over-temperature shutdown
    • Provides a complete protection function
Applications
   
  • General-purpose, constant-current sources
  • Smart LED lighting
 
  • General LED lighting drivers with dimming function

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