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LTC3722-2 PDF预览

LTC3722-2

更新时间： 2024-09-23 22:55:55
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
28页 320K
描述
Synchronous Dual Mode Phase Modulated Full Bridge Controllers

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中文翻译

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LTC3722-2 数据手册

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Final Electrical Specifications  
LTC3722-1/LTC3722-2  
Synchronous Dual Mode  
Phase Modulated  
Full Bridge Controllers  
February 2003  
U
DESCRIPTIO  
FEATURES  
TheLTC®3722-1/LTC3722-2phaseshiftPWMcontrollers  
provide all of the control and protection functions neces-  
sary to implement a high efficiency, zero voltage switched  
(ZVS), full bridge power converter. Adaptive ZVS circuitry  
delays the turn-on signals for each MOSFET independent  
of internal and external component tolerances. Manual  
delay set mode enables secondary side control operation  
or direct control of switch turn-on delays.  
■
Adaptive or Manual Delay Control for Zero Voltage  
Switching Operation  
■
Adjustable Synchronous Rectification Timing for  
Highest Efficiency  
Adjustable Maximum ZVS Delay  
■
■
Adjustable System Undervoltage Lockout and  
Hysteresis  
■
Programmable Leading Edge Blanking  
■
Very Low Start-Up and Quiescent Currents  
The LTC3722-1/LTC3722-2 feature adjustable synchro-  
nous rectifier timing for optimal efficiency. A UVLO pro-  
gram input provides accurate system turn-on and turn-off  
voltages. The LTC3722-1 features peak current mode  
controlwithprogrammableslopecompensationandlead-  
ing edge blanking, while the LTC3722-2 employs voltage  
mode control with voltage feedforward capability.  
■
Current Mode (LTC3722-1) or Voltage Mode  
(LTC3722-2) Operation  
■
Programmable Slope Compensation  
■
VCC UVLO and 25mA Shunt Regulator  
■
50mA Output Drivers  
■
Soft-Start, Cycle-by-Cycle Current Limiting and  
Hiccup Mode Short-Circuit Protection  
■
The LTC3722-1/LTC3722-2 feature extremely low operat-  
ingandstart-upcurrents. Bothdevicesincludeafullrange  
of protection features and are available in the 24-pin  
surface mount (GN) package.  
5V, 15mA Low DUropout Regulator  
APPLICATIO S  
■
Telecommunications, Infrastructure Power Systems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
■
Distributed Power Architectures  
Server Power Supplies  
■
U
TYPICAL APPLICATIO  
V
IN  
36V TO 72V  
C
IN  
R1  
12VOUT, 240W Converter Efficiency  
95  
36V  
IN  
MA  
MC  
MD  
T1  
LTC3722  
90  
85  
80  
75  
L1  
L2  
48V  
V
IN  
OUT  
12V  
72V  
IN  
C
OUT  
MB  
1/2  
U1  
1/2  
U1  
U2  
ME  
RCS  
T2  
C1  
MF  
0
2
4
6
8
10 12 14 16 18 20  
CURRENT (A)  
3722 • TA01A  
U1, U2: LTC1693-1 DUAL GATE DRIVER  
3722 TA01b  
372212i  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
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