AP 5 199

LED Driver

Descrtption

The AP5199 is an average current mode control LED driver IC operating in a constant off-time mode. Unlike AP5160,this control IC does not produce a peak-to-average error, and therefore greatly improves accuracy, line and load regulation of the LED current without any need for loop compensation or high-side current sensing. The output LED current accuracy is ±3%. The IC is equipped with a current limit comparator for hiccup-mode output short circuit protection. The AP5199 can be powered from an 8.0 - 450V supply. A PWM dimming input is provided that accepts an External control TTL compatible signal. The output current can be programmed by an internal 275mV reference, or controlled externally through a 0 - 1.5V dimming input.

Typical Application Circuit

Features

● Fast average current control

● Programmable constant off-time switching

● Linear dimming input

● PWM dimming input

● Output short circuit protection with skip mode

● Ambient operating temperature -40OC to +125OC

● Pin-compatible with the AP51 99

Applications

● DC/DC or AC/DC LED driver applications

● LED backlight driver for LCD displays

● General purpose constant current source

● LED signage and displays

● Architectural and decorative LED lighting