AL1673
UNIVERSAL FLYBACK AND BUCK-BOOST
SINGLE STAGE DIMMABLE LED DRIVER
Description
Pin Assignments
The AL1673 is a high performance single stage Flyback/Buck-Boost
converter, targeting dimmable LED lighting application. It is operating
at BCM mode which results in good EMI and efficiency.
The AL1673 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 AL1673 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/2A high voltage MOSFET.
(Top View)
CS 1
GND 2
DRAIN 3
DRAIN 4
8 COMP
7 APWM
EP
6 FB
5 VCC
SO-8EP
The AL1673 is available in SO-8EP package.
Applications
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/2A 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)
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.
AL1673
Document number: DS39540 Rev. 1 - 2
1 of 15
www.diodes.com
April 2017
© Diodes Incorporated
