EC4304C-1.5A,Hysteretic,High Brightness LED Driver
General description
The EC4304C is a continuous mode inductive step-down and buck-boost converter, designed for driving single or multiple series connected LEDs from a voltage source higher than or lower than the LED voltage. It operates from input supply between 7V and 40V and provides andexternally adjustable output current up to 1.5A with proper supply voltage and external components, the EC4304C can provide more than 50 watts of output power .

This EC4304C includes the output switch and high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. The ADJ pin will accept either a wide range pulse dimming waveform or a DC voltage. This will provide either acontinuous or gated output current depending upon the control frequency. The soft-start time can be increased by connecting an external capacitor from the ADJ pin to ground. The PWM filter components also serve as soft-start time setting. Applying a 0.2V or lower to the ADJ pinturns the output off and switches the device into a low current standby state.

Features
lOperates from 7V to 40V Supply Voltage

lSingle Pin On/Off and Brightness Control Using DC Voltage or PWM

lUp to 95% Efficiency

lInternal 40V NDMOS Switch

lUp to 1.5A Output Current

lTypical +/-5% LED Current Accuracy

lInput Under Voltage Lockout

lSOP 8L(Exposed PAD) Package

lRoHS Compliant and Halogen-Free

Applications
lAutomotive LED Lighting

lHigh Power LED Lighting

lIndicator and Emergency Lighting

lArchitectural Lighting

lLow Voltage Industrial Lighting

lSignage and Decorative LED Lighting

Pin Configurations

Ordering info

Typical Applications circuit