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AL9901
Document number: DS37713 Rev. 1 - 2
1 of 20
www.diodes.com
March 2015
© Diodes Incorporated
AL9901
UNIVERSAL HIGH VOLTAGE LED DRIVER
Description
The AL9901, high-
voltage PWM LED driver provides an efficient
solution for offline, high-brightness LED lamps for
rectified line
voltages ranging from 85V
AC
up to 305V
AC
. The AL9901
has an
internal MOSFET that allows switching frequencies up to 300kHz,
with the switching frequency determined by an external single
resistor. The AL9901 topology creates a constant current through the
LEDs providing constant light output. The output cur
rent is
programmed by one external resistor.
The LED brightness can be varied by both Linear and PWM dimming,
using the AL9901’s LD and PWM pins respectively. The PWM input
operates with a duty ratio of 0-100% and a
frequency of up to several
kHz.
The AL9901 is available in the thermally enhanced U-DFN6040-
12
and SO-16 packages. The SO-
16 is compliant to high voltage spacing
rules for 230VAC mains applications.
Features
• >90% Efficiency
• Universal Rectified 85 to 305V
AC
Input Range
• Internal MOSFET Up to 650V, 2A
• High Switching Frequency Up to 300kHz
• Internal Voltage Regulator Removes Start-Up Resistor
• 7.5V Regulated Output
• Tighter Current Sense Tolerance Better Than 5%
• LED Brightness Control with Linear and PWM Dimming
• Internal Over-Temperature Protection (OTP)
• U-DFN6040-12 and SO-16 Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
U-DFN6040-12
SO-16
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 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.
Typical Applications Circuit
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1 Seite 2
- ・ Abmessungen des Paketumrisses on Seite 17
- ・ Paket-Footprint-Pad-Layout on Seite 18
- ・ Teilenummerierungssystem on Seite 16
- ・ Markierungsinformationen on Seite 16
- ・ Blockdiagramm on Seite 2 Seite 11
- ・ Typisches Anwendungsschaltbild on Seite 1 Seite 13 Seite 14
- ・ Technische Daten on Seite 3 Seite 4
- ・ Anwendungsbereich on Seite 1 Seite 11 Seite 12 Seite 13 Seite 14
- ・ Elektrische Spezifikation on Seite 4
