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AL1698 Datasheet

DIMMABLE LED DRIVER

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AL1698
DIMMABLE LED DRIVER
Description
The AL1698 is a high performance, high power factor, high efficiency,
and high current precision buck-boost and flyback dimmable LED
driver for triac dimmable LED lamp applications. The AL1698
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 AL1698 LED driver has a built-in high voltage JFET, which
provides the system fast start-up time and enables users an easy and
stable VCC supply design. The AL1698 also integrates a 600V/2A high
voltage MOSFET. It can cover 230VAC triac dimmable applications
with eliminating the external high voltage MOSFET and VCC startup
resistors, which will reduce the system BOM cost. The AL1698 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.
Pin Assignments
(Top View)
VCC 1
RT 2
COMP 3
GND 4
SO-7
Applications
Mains Dimmable LED Lamps
Offline LED Power Supply Driver
7D
6 CS
5 ROVP
The AL1698 dimming curve is compliant with the NEMA SSL6
standard. The AL1698 applies to a wide range of dimmers, including
leading edge and trailing edge dimmer, to achieve deep dimming
down to 1%.
The AL1698 is available in SO-7 package.
Features
Tight Current Sense Tolerance : ±3%
Low Operation Current : 310µA
Single Winding Inductor
Wide Range of Dimmer Compatibility
Integration of 600V/2A MOSFET
Integration of HV JFET
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) & 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.
AL1698
Document number: DS42216 Rev. 1 - 2
1 of 15
www.diodes.com
September 2019
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL1698 Datasheet

DIMMABLE LED DRIVER

No Preview Available !

Typical Application Circuits
L1
AC
Input
FR1
DB1
C1
R1
C2 C3
AL1698
C5
L2 R7
LEDS
+
VCC 1
RT 2
COMP
3
C4 R6
GND
4
C6
7D
CS
6
5 ROVP
R5
R3
D1
AL1698 Buck-Boost Application Circuit
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
Pin Name
VCC
RT
COMP
GND
ROVP
CS
D
Function
Power Supply Voltage
Connect a Resistor to Set the System’s Maximum tON
Compensation for Current Control
Ground
Connect a Resistor to Set LED Open Protection Voltage
Current Sensing
Drain of the Internal High Voltage MOSFET
AL1698
Document number: DS42216 Rev. 1 - 2
2 of 15
www.diodes.com
September 2019
© Diodes Incorporated


Part Number AL1698
Description DIMMABLE LED DRIVER
Maker Diodes
Total Page 15 Pages
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