Diodes Incorporated

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AL1672 (Not Recommended for new design)

NRND = Not Recommended for New Design


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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.

The AL1672 features low start-up current and low operation current. It integrates multiple protections including over voltage, short circuit, over current and over temperature protection. It also integrates 600V/4A high voltage MOSFET.

The AL1672 is available in SO-8EP package.


  • 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)


  • General LED Lighting Driver with Dimming Function
  • General Purpose Constant Current Source
  • Smart LED Lighting

Product Specifications

Product Parameters

Accuracy (%) 3
Dimming PWM, Analog
Efficiency (%) 85
Frequency (kHz) 150
LED Current (mA) N/A
Maximum DC VDD (VDC) 30
Maximum Input AC Voltage (VAC) 265
Minimum Input AC Voltage (VAC) 85
SupplyCurrent (mA) N/A
Temperature Range (°C) -40 to 150

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Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2519 2021-05-20 2021-11-20 Device End of Life (EOL)