AL9910-5：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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AL9910-5 | AL9910_A.pdf | - | 15 | 500 | 7.5 | 10 | External MOSFET | 5 | 300 | 90 | PWM/DC | 0.5 | -40 to +105 -40 to +85 |
Description
The AL9910-5 is a PWM high-efficiency °C driver control IC. It allows efficient operation of High Brightness (HB) °Cs from voltage sources ranging from 85VAC up to 265VAC. The AL9910 controls an external MOSFET at fixed switching frequency up to 300kHz. The frequency can be programmed using a single resistor. The °C string is driven at constant current rather than constant voltage, thus providing constant light output and enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A. The AL9910-5 uses a rugged high voltage junction isolated process that can withstand an input voltage surge of up to 500V. Output current to an °C string can be programmed to any value between zero and its maximum value by applying an external control voltage at the linear dimming control input of the AL9910. The AL9910-5 provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kHz. For improved °C current accuracy the AL9910-5 has a 5% tolerance on the peak current switching threshold. The AL9910-5 is available in the thermally enhanced SO-8EP package
Application
- DC/DC or AC/DC LED Driver application
- RGB Backlighting LED Driver
- Back Lighting of Flat Panel Displays
- General purpose constant current source
- Signage and Decorative LED Lighting
Features
- >90% Efficiency
- Universal rectified 85 to 277VAC input range
- Input voltage up to 500V
- Internal voltage regulator removes start-up resistor o 7.5V MOSFET drive – AL9910 o 10V MOSFET drive – AL9910A
- Tighter current sense tolerance: 5% AL9910-5
- Drives °C Lamps with both high and low current °Cs
- °C brightness control with Linear and PWM dimming
- Internal Thermal Protection (OTP)
- SO-8 and SO-8EP in “Green” Molding Compound
- (No Br, Sb) with Lead Free Finish/ RoHS Compliant
Ordering Information
- AL9910-5S-13
- AL9910-5SP-13
SO-8
SO-8EP
- AL9910_A.pdf AL9910A-5
