升压型LED恒流驱动器芯片 XL6005

Features
n Wide 5V to 32V Input Voltage Range
n 0.22V FB adjustable LED drive current
n Directly drive 11 Series 1W LED at
VIN>=12V
n Fixed 180KHz Switching Frequency
n Max. 5A Switching Current Capability
n Up to 94% 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 TO252-5L package
Applications
n LED Lighting
n Boost constant current driver
n Monitor LED Backlighting
n 7’ to 15’ LCD Panels
General Description
The XL6005 regulator is fixed frequency PWM
Boost (step-up) LED constant current driver,
capable of driving Series 1W/3W/5W 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 XL6005 could directly drive 11 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 XL6005