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LTC3722-1_15 PDF预览

LTC3722-1_15

更新时间： 2024-11-12 01:16:59
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 347K
描述
Synchronous Dual Mode Phase Modulated Full Bridge Controllers

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中文翻译

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LTC3722-1_15 数据手册

 浏览型号LTC3722-1_15的Datasheet PDF文件第2页浏览型号LTC3722-1_15的Datasheet PDF文件第3页浏览型号LTC3722-1_15的Datasheet PDF文件第4页浏览型号LTC3722-1_15的Datasheet PDF文件第5页浏览型号LTC3722-1_15的Datasheet PDF文件第6页浏览型号LTC3722-1_15的Datasheet PDF文件第7页 
LTC3722-1/LTC3722-2  
Synchronous Dual Mode  
Phase Modulated  
Full Bridge Controllers  
DESCRIPTION  
The LTC®3722-1/LTC3722-2 phase-shift PWM controllers  
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.  
FEATURES  
n
Adaptive or Manual Delay Control for Zero Voltage  
Switching Operation  
n
Adjustable Synchronous Rectification Timing for  
Highest Efficiency  
Adjustable Maximum ZVS Delay  
n
n
Adjustable System Undervoltage Lockout Hysteresis  
n
Programmable Leading Edge Blanking  
n
Very Low Start-Up and Quiescent Currents  
n
Current Mode (LTC3722-1) or Voltage Mode  
The LTC3722-1/LTC3722-2 feature adjustable synchron-  
ousrectifiertimingforoptimalefficiency.AUVLOprogram  
input provides accurate system turn-on and turn-off  
voltages. The LTC3722-1 features peak current mode  
control with programmable slope compensation and  
leading edge blanking, while the LTC3722-2 employs  
voltage mode control.  
(LTC3722-2) Operation  
Programmable Slope Compensation  
n
n
V
UVLO and 25mA Shunt Regulator  
CC  
n
n
50mA Output Drivers  
Soft-Start, Cycle-by-Cycle Current Limiting and  
Hiccup Mode Short-Circuit Protection  
5V, 15mA Low Dropout Regulator  
24-Pin Surface Mount GN Package  
n
n
TheLTC3722-1/LTC3722-2featureextremelylowoperating  
and start-up currents. Both devices include a full range of  
protection features and are available in the 24-pin surface  
mount GN package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
DirectSense is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
APPLICATIONS  
n
Telecommunications, Infrastructure Power Systems  
n
Distributed Power Architectures  
n
Server Power Supplies  
TYPICAL APPLICATION  
V
IN  
36V TO  
72V  
C
R1  
IN  
12VOUT, 240W Converter Efficiency  
U2  
U1  
95  
MA  
MC  
36V  
IN  
T1  
90  
85  
80  
75  
L1  
L2  
LTC3722  
V
OUT  
12V  
48V  
IN  
72V  
IN  
C
OUT  
MB  
MD  
T2  
RCS  
ME  
0
2
4
6
8
10 12 14 16 18 20  
CURRENT (A)  
U3  
C1  
MF  
372212 TA01b  
U1, U2: LTC4440 GATE DRIVER  
U3: LTC3901 GATE DRIVER  
372212 TA01a  
372212fb  
1
For more information www.linear.com/LTC3722  
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