AL1697 Datasheet, PDF (1/13 Pages) Diodes Incorporated – High PF, Offline Dimmable LED Driver with Internal High-Voltage MOSFET

AL1697
High PF, Offline Dimmable LED Driver with Internal High-Voltage MOSFET
Description
The AL1697 is a high performance, high power factor, high efficiency
and high precision buck-boost LED driver for mains dimmable LED
lamp applications. The AL1697 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.
The AL1697 with built in MOSFET solution reduces the bill of material
(BOM) cost by eliminating the need of auxiliary winding and an
external high voltage MOSFET. The AL1697 has extensive protection
features to enhance system safety and reliability. The AL1697 starts
reducing output current when the driver’s temperature is higher than
the built-in thermal foldback protection trigger point.
Pin Assignments
(Top View)
VCC 1
RT 2
COMP 3
GND 4
SO-7
7D
6 CS
5 FB
The AL1697 applies to a wide range of dimmers including leading
edge and trailing edge dimmer. Some can achieve deep dimming
down to 1%. The AL1697 dimming curve is compliant with the NEMA
SSL6 standard.
The AL1697 is available in SO-7 package, which provides an extra
pin spacing between the high voltage MOSFET’s drain and low
voltage pins to increase electricity isolation.
Applications
 Mains Dimmable LED Lamps
 Offline LED Power Supply Driver
Features
 Two Internal High-Voltage MOSFET Options:
 RDSON 4Ω and 1.8Ω for Super-Junction
 Tight Current Sense Tolerance : ±3%
 Low Startup Current: 130µA
 Low Operation Current: 170µA (Switching Frequency at 4kHz)
 Single Winding Inductor
 Wide Range of Dimmer Compatibility
 NEMA SSL6 Dimming Curve Compliant
 Internal Protections
 Under Voltage Lockout (UVLO)
 Leading-Edge Blanking (LEB)
 Cycle-by-cycle Over Current Protection (OCP)
 Output Open/Short Protection (OVP/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) 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.
AL1697
Document number: DS38223 Rev. 3 - 2
1 of 13
www.diodes.com
January 2016
© Diodes Incorporated