FP7175

LED Driver with Average-Mode Constant Current Control

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Rev. 0.63

1/14

General Description

The FP7175 is an average current mode control LED driver IC operating in a constant off-time

mode. FP7175 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 ±2%.

The FP7175 can be powered from an 8.0 - 100V supply. PWM & Linear dimming input is provided

that accepts an external control TTL compatible signal. The output current can be programmed by an

internal 250mV reference.

Features

 Fast Average Current Control

 Internal 8 to 100V Linear Regulator

 Linear and PWM Dimming Capability

 Output Short Circuit Protection with Skip Mode

 Requires Few External Components for Operation

Applications

 DC/DC or AC/DC LED Driver Applications

 LED Street Lighting

 Back Lighting of Flat Panel Displays

 General Purpose Constant Current Source

 Signage and Decorative LED Lighting

 Chargers

Typical Application Circuit

VDD

DIM

VIN

CS

GND

GATE

FP7175

Linear & PWM

Dimming

LED+

LED-

VIN

GND