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AL9910/ AL9910A/ AL9910-5/ AL9910-5A
Document number: DS35103 Rev. 9 - 2
1 of 15
www.diodes.com
May 2014
© Diodes Incorporated
A
L9910/ AL9910A/ AL9910-5/ AL9910A-5
UNIVERSAL HIGH VOLTAGE HIGH BRIGHTNESS LED DRIVER
Description
The AL9910/A high voltage PWM LED driver-controller provides an
efficient solution for offline high brightness LED lamps from rectified
line voltages ranging from 85V
AC
up to 277V
AC
. The AL9910 drives
external MOSFETs at switching frequencies up to 300kHz, with the
switching frequency determined by a single resistor. The AL9910
topology creates a constant current through the LEDs providing
constant light output. The output current is programmed by one
external resistor and is ultimately determined by the external
MOSFET chosen and therefore allows many low current LEDs to be
driven as well as a few high current LEDs.
The LED brightness can be varied by both Linear and PWM dimming
using the AL9910’s LD and PWM_D pins respectively. The PWM_D
input operates with duty ratio of 0-100% and frequency of up to
several kHz.
The AL9910 can withstand input voltages up to 500V which makes it
very resilient to transients at standard mains voltages. As well as
standard SO-8 package the AL9910 is available in the thermally
enhanced SO-8EP package.
Features
• >90% Efficiency
• Universal Rectified 85 to 277V
AC
Input Range
• Input Voltage Up to 500V
• Internal Voltage Regulator Removes Start-Up Resistor
7.5V MOSFET Drive – AL9910
10V MOSFET Drive – AL9910A
• Tighter Current Sense Tolerance: 5% AL9910-5, AL9910A-5
• Drives LED Lamps with Both High and Low Current LEDs
• LED Brightness Control with Linear and PWM Dimming
• Internal Thermal Protection (OTP)
• Available in SO-8 and SO-8EP Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
Applications
• LED Offline Lamps
• High Voltage DC-DC LED Driver
• Signage and Decorative LED Lighting
• Back Lighting of Flat Panel Displays
• General Purpose Constant Current Source
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.
PWM_D
V
DD
LD
R
OSC
GATE
GND
CS
V
IN
(Top View)
SO-8
1
2
3
4
8
7
6
5
AL9910
PWM_D
V
DD
LD
R
OSC
GATE
GND
CS
V
IN
(Top View)
SO-8EP
1
2
3
4
8
7
6
5
AL9910
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