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PDF ( 数据手册 , 数据表 ) XL4012

零件编号 XL4012
描述 12A 300KHz 32V Buck DC to DC Converter
制造商 Xlsemi
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XL4012 数据手册, 描述, 功能
12A 300KHz 32V Buck DC to DC Converter
Datasheet
XL4012
Features
„ Wide 5V to 32V Input Voltage Range
„ Output Adjustable from 0.8V to 30V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 0.6V
„ Fixed 300KHz Switching Frequency
„ 12A Constant Output Current Capability
„ Internal Optimize Power MOSFET
„ High efficiency
„ Excellent line and load regulation
„ Built in thermal shutdown function
„ Built in current limit function
„ Built in output short protection function
„ Available in TO-220 package
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
General Description
The XL4012 is a 300 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 12A load with high
efficiency, low ripple and excellent line and
load regulation. Requiring a minimum
number of external components, the regulator
is simple to use and include internal
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 100%. An over
current protection function is built inside.
When short protection function happens, the
operation frequency will be reduced from
300KHz to 60KHz. An internal compensation
block is built in to minimize external
component count.
Figure1. Package Type of XL4012







XL4012 pdf, 数据表
12A 300KHz 32V Buck DC to DC Converter
Typical System Application for 24V ~ 12V/12A Version
Datasheet
XL4012
Figure6. XL4012 System Parameters Test Circuit (24V ~ 12V/12A)














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