AL16937
BUCK DIMMABLE LED DRIVER
Description
The AL16937 is a high performance, high power factor, high
efficiency, and high current precision buck dimmable LED driver for
triac dimmable LED lamp applications. The AL16937 topology
provides an accurate output current over wide line and load
regulation. The wide switching frequency operates at boundary
conduction mode (BCM) to ease EMI/EMC design and testing, to
meet the latest regulatory standards.
Pin Assignments
(Top View)
VCC 1
RT 2
7D
The AL16937 LED driver integrates 400V/3A MOSFET, which is
suitable for 120VAC applications. The AL16937 has the built-in
thermal fold-back protection trigger point to automatically reduce
output current. Other protection features enhance LED lighting
system's safety and reliability.
COMP 3
GND 4
6 CS
5 NC
The AL16937 dimming curve is compliant with the NEMA SSL6
standard. The AL16937 applies to a wide range of dimmers, including
leading edge and trailing edge dimmer, to achieve deep dimming
down to 1%.
The AL16937 is available in SO-7 package.
SO-7
Applications
Mains Dimmable LED Lamps
Offline LED Power Supply Driver
Features
Tight Current Sense Tolerance : ±3%
Low Startup Current: 100µA Typical
Low Operation Current: 210µA (Switching Frequency at 4kHz)
Single Winding Inductor
Wide Range of Dimmer Compatibility
Integration of 400V/3A MOSFET
NEMA SSL6 Dimming Curve Compliant
Internal Protections
Under Voltage Lockout (UVLO)
Leading-Edge Blanking (LEB)
Cycle-By-Cycle Over Current Protection (OCP)
Output Short Protection (OSP)
Thermal Foldback Protection (TFP)
Over-Temperature Protection (OTP)
SO-7 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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.
AL16937
Document number: DS39631 Rev. 2 - 2
1 of 15
www.diodes.com
April 2018
© Diodes Incorporated
