AL9902：Off-Line LED Drivers
| Part Number | Data Sheet | SPICE Model | MinimumInput Voltage (V) | MaximumInput Voltage (V) | VDD (V) | OutputCurrent (mA) | LED Current (A) | Accuracy (%) | Frequency (kHz) | Efficiency (%) | Dimming | SupplyCurrent (mA) | Temperature Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AL9902 | AL9902.pdf | 20 | 500 | 11 | 400 | Internal MOSFET (650V, up to 2A) | 3 | 300 | 85 | Linear and PWM | 1 | -40~ +125 |
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.
Application
- 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
Features
- >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
Ordering Information
- AL9902FDF-13
- AL9902S16-13
U-DFN6040-12
SO-16
- AL9902.pdf AL9902
