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The AL9902 is high voltage PWM LED driver provides an efficient solution for offline high brightness LED lamps from rectified line voltages ranging from 85VAC up to 277VAC. The AL9902 has an internal MOSFET that allows switching frequencies up to 300kHz, with the switching frequency determined by an external single resistor. The AL9902 topology creates a constant current through the LEDs providing constant light output. The output current is programmed by one external resistor. The LED brightness can be varied by both Linear and PWM dimming using the AL9902’s LD and PWM pins respectively. The PWM input operates with duty ratio of 0-100% and frequency of up to several kHz.


  • >85% Efficiency
  • Universal Rectified 85 VAC to 277VAC Input Range
  • Internal MOSFET Up to 650V, 2A
  • High Switching Frequency Up to 300kHz
  • Internal Voltage Regulator Removes Start-Up Resistor
  • 10V 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


  • 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

Product Specifications

Product Parameters

Minimum Input AC Voltage (VAC) 85
Maximum Input AC Voltage (VAC) 277
Maximum DC VDD (VDC) 500
LED Current (mA) Internal MOSFET (650V, up to 2A)
Frequency (kHz) 300
Accuracy (%) 3 %
Efficiency (%) 85 %
Dimming Linear and PWM
SupplyCurrent (mA) 1 mA
Temperature Range (°C) -40 to 125 °C

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet EU 75 10/4/2022 Germany Buy Now
Mouser Electronics Inc. 2981 10/4/2022 South America, North America, Asia, Europe, Middle East Buy Now
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Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 1387 10/4/2022 South America, North America, Asia, Europe, Middle East Buy Now
Digi-Key Electronics 603 10/3/2022 Europe, Asia, North America Buy Now
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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site