升压型LED恒流驱动器芯片 XL6003

Features
n Wide 5V to 18V Input Voltage Range
n 0.22V FB adjustable LED drive current
n Directly drive 6 Series 1W LED at
VIN>=12V
n Fixed 400KHz Switching Frequency
n Max. 2A Switching Current Capability
n Up to 92% efficiency
n Excellent line and load regulation
n EN PIN TTL shutdown capability &
With PWM Dimming Function
n Internal Optimize Power MOSFET
n Built in Soft-Start Function
n Built in Frequency Compensation
n Built in Thermal Shutdown Function
n Built in Current Limit Function
n Available in SOP8 package
Applications
n LED Lighting
n Boost constant current driver
n Monitor LED Backlighting
n 7’ to 15’ LCD Panels
General Description
The XL6003 regulator is fixed frequency PWM
Boost (step-up) LED constant current driver,
capable of driving Series 1W LED units with
excellent line and load regulation. The regulator is
simple to use because it includes internal frequency
compensation and a fixed-frequency oscillator so
that it requires a minimum number of external
components to work.
The XL6003 could directly drive 6 Series 1W LED
units at VIN>12V .
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 95%. An enable
function, an over current protection function
is built inside. An internal compensation
block is built in to minimize external
component count.
Figure1. Package T*e of XL6003