Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SO-16

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. U-DFN6040-12

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AL9902

LINEAR AND PWM DIMMING HIGH VOLTAGE LED DRIVER

Datasheet

Evaluation Boards and User Guides

AL9902EV1-User-Guide.pdf (435 KB)

Contact Sales

Description

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.

Feature(s)

>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

Application(s)

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

Specifications & Technical Documents

Product Parameters

Minimum Input AC Voltage (V_AC)	85
Maximum Input AC Voltage (V_AC)	277
Maximum DC VDD (V_DC)	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

Technical Documents

Evaluation Boards and User Guides

AL9902EV1-User-Guide.pdf (435 KB)

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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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-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2512	2021-04-16	2021-07-16	Qualified Additional Assembly & Test (A/T) Site