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LTC3722EGN-2 Datasheet

  • LTC3722EGN-2

  • Synchronous Dual Mode Phase Modulated Full Bridge Controller...

  • 28頁(yè)

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Final Electrical Specifications
LTC3722-1/LTC3722-2
Synchronous Dual Mode
Phase Modulated
Full Bridge Controllers
FEATURES
s
s
DESCRIPTIO
February 2003
s
s
s
s
s
s
s
s
s
s
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
Current Mode (LTC3722-1) or Voltage Mode
(LTC3722-2) Operation
Programmable Slope Compensation
V
CC
UVLO and 25mA Shunt Regulator
50mA Output Drivers
Soft-Start, Cycle-by-Cycle Current Limiting and
Hiccup Mode Short-Circuit Protection
5V, 15mA Low Dropout Regulator
The LTC
廬
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 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
control with programmable slope compensation and lead-
ing edge blanking, while the LTC3722-2 employs voltage
mode control with voltage feedforward capability.
The LTC3722-1/LTC3722-2 feature extremely low operat-
ing and start-up currents. Both devices include a full range
of protection features and are available in the 24-pin
surface mount (GN) package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
Telecommunications, Infrastructure Power Systems
Distributed Power Architectures
Server Power Supplies
TYPICAL APPLICATIO
V
IN
36V TO 72V
C
IN
R1
12V
OUT
, 240W Converter Efficiency
95
MA
MC
T1
L1
L2
LTC3722
90
EFFICIENCY (%)
V
OUT
12V
MB
1/2
U1
RCS
MD
1/2
U1
U2
T2
ME
C
OUT
85
80
C1
MF
75
0
3722 鈥?TA01A
U1, U2: LTC1693-1 DUAL GATE DRIVER
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-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
36V
IN
48V
IN
72V
IN
2
4
6
U
U
8 10 12 14 16 18 20
CURRENT (A)
3722 TA01b
372212i
1

LTC3722EGN-2 產(chǎn)品屬性

  • LTC3722-1/2

  • 55

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電壓模式，全橋

  • 1

  • 1MHz

  • 98.5%

  • 3.8 V ~ 10.3 V

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 無(wú)

  • 是

  • 無(wú)

  • 是

  • -40°C ~ 85°C

  • 24-SSOP（0.154"，3.90mm 寬）

  • 管件

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