参数资料
型号: LTC3722IGN-2#PBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG CTRLR DIV ISO PWM 24SSOP
标准包装: 55
PWM 型: 电压模式,全桥
输出数: 1
频率 - 最大: 1MHz
占空比: 98.5%
电源电压: 3.8 V ~ 10.3 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 管件
LTC3722-1/LTC3722-2
Adaptive or Manual Delay Control for Zero Voltage
Adjustable Synchronous Rectification Timing for
Adjustable Maximum ZVS Delay
Adjustable System Undervoltage Lockout Hysteresis
Programmable Leading Edge Blanking
Very Low Start-Up and Quiescent Currents
Current Mode (LTC3722-1) or Voltage Mode
Programmable Slope Compensation
V CC UVLO and 25mA Shunt Regulator
50mA Output Drivers
Soft-Start, Cycle-by-Cycle Current Limiting and
5V, 15mA Low Dropout Regulator
24-Pin Surface Mount GN Package
Telecommunications, Infrastructure Power Systems
Distributed Power Architectures
Server Power Supplies
FEATURES
n
Switching Operation
n
Highest Efficiency
n
n
n
n
n
(LTC3722-2) Operation
n
n
n
n
Hiccup Mode Short-Circuit Protection
n
n
APPLICATIONS
n
n
n
TYPICAL APPLICATION
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.
The LTC3722-1/LTC3722-2 feature adjustable synchron-
ous rectifier timing for optimal efficiency. A UVLO program
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.
The LTC3722-1/LTC3722-2 feature extremely low operating
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.
V IN
36V TO
72V
C IN
R1
12V OUT , 240W Converter Efficiency
U1
MA
MC
U2
95
T1
36V IN
LTC3722
MB
MD
L1
L2
V OUT
12V
C OUT
90
85
72V IN
48V IN
RCS
ME
80
C1
T2
U3
MF
75
0
2
4
6
8 10 12 14 16 18 20
CURRENT (A)
372212 TA01b
U1, U2: LTC4440 GATE DRIVER
U3: LTC3901 GATE DRIVER
372212 TA01a
372212fb
For more information www.linear.com/LTC3722
1
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