AL1672

Document number: DS39344 Rev. 1 - 2

1 of 14

www.diodes.com

July 2017

© Diodes Incorporated

AL1672

SINGLE STAGE DIMMABLE BUCK CONVERTER

WITH 600V/4A MOSFET

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.

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.

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)

Pin Assignments

(Top View)

1

2

3

4

8

7

6

5

CS

GND

DRAIN

DRAIN

COMP

APWM

FB

VCC

EP

SO-8EP

Applications



General LED Lighting Driver with Dimming Function



General Purpose Constant Current Source



Smart LED Lighting

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.