Description

LA8303 is a voltage mode, step-down LED

driver that is designed to meet maximum 2A

constant current for high power LED

application, and utilizes PWM control scheme

that switches with 300KHz fixed frequency.

The input voltage range of LA8303 is from 3.6V

to 23V. It is suitable for series-parallel 1W, 3W,

or 5W high power LED application due to the

high operation voltage and output capability.

At 12VIN, this device can drive up to 15pcs

(3S-5P) 1W LEDs. The 0.21V low feedback

voltage can reduce the power dissipation of the

constant current setting resistor, and improve

the conversion efficiency.

This device provides excellent regulation

during line or load transient. Other features of

external ON/OFF control, current limit, thermal

shutdown protection, and short circuit

protection are also included. It can also

operate with a maximum duty cycle of 100

for use in low drop-out conditions. The

package is available in standard SOP-8.

Features

l Up to 96 Efficiency

l 0.21V Low Feedback Voltage

l 3.6V to 23V Input Voltage Range

l Driving up to 15 LEDs (1W 3S-5P) at 12VIN

l 300KHz Oscillation Frequency

l Continuous 2A Output Capability

l 100 Duty Cycle

l 3mA Low Supply Current

l 1uA Low Shutdown Current

l PWM or Analog Dimming Control

l Built-in Low RDS(ON) Power MOSFET

l No External Compensation Required

l Adjustable Current Limit

l Short Circuit and Thermal Protection

l SOP-8 Package

l Meet RoHS Standard

Applications

l High Power LED Driver

l Backlight Applications

l General Lighting Solutions

l Constant Current Source