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ACE722AFM+H 数据表(PDF) 1 Page - ACE Technology Co., LTD.

部件名 ACE722AFM+H
功能描述  2A PWM BUCK DC-DC Converter
Download  9 Pages
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制造商  ACE [ACE Technology Co., LTD.]
网页  http://www.ace-ele.com
标志 ACE - ACE Technology Co., LTD.

ACE722AFM+H 数据表(HTML) 1 Page - ACE Technology Co., LTD.

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ACE722A
Technology
2A PWM BUCK DC-DC Converter
VER 1.2
1
Description
ACE722A is a 420kHz fixed frequency PWM buck (step-down) DC-DC converter, capable of driving a 2A
load with high efficiency, low ripple and excellent line and load regulation. The device includes a voltage
reference, an oscillation circuit, an error amplifier, an internal PMOS and etc.
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. The enable function, over
current protection function, short circuit protection function and soft-start function are built inside. When
OCP or SCP happens, the operation frequency will be reduced from 420kHz to 40kHz. An internal
compensation block is employed to minimize external components.
The ACE722A serves as an ideal power supply unit for portable devices, especially for chip set power in
portable systems. It’s widely used for PDVD, LCD monitor and DPF chip set powers.
Features
2A Constant Output Current
130mΩ R
DSON Internal Power MOSFET Switch
Up to 94% Efficiency
Fixed 420kHz Frequency
Wide 4.75V to 25V Input Voltage Range
Output Voltage Adjustable from 0.8V to 21V
Built in Thermal Shutdown Function
Built-in Current Limit Function
Built-in Soft-Start Function
Support Ceramic or Electrolytic Capacitors
Application
Portable DVE
LCD Monitor/LCD TV
Digital Photo Frame
ADSL
Set-up Box
Absolute Maximum Ratings
Parameter
Symbol
Max
Unit
Input Voltage
VIN
-0.3 to 30
V
FB Pin Voltage
VFB
-0.3 to 6
V
EN Pin Voltage
VEN
-0.3 to VIN
V
COMP Pin Voltage
VCOMP
-0.3 to 6
V
SW Pin Voltage
VSW
-0.3 to VIN
V
Power Dissipation
PD
Internally Limited mW
Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR)
θJA
100
OC/W
Operating Junction Temperature
TJ
150
OC
Storage Temperature
TSTG
-65 to 150
OC
Lead Temperature (Soldering, 10sec)
TLEAD
260
OC
ESD (Human Body Model)
ESD
2000
V


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