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LTC3722IGN-1#PBF

Description
IC REG CTRLR FULL-BRIDGE 24SSOP
Categorysemiconductor    Power management   
File Size627KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3722IGN-1#PBF Overview

IC REG CTRLR FULL-BRIDGE 24SSOP

LTC3722IGN-1#PBF Parametric

Parameter NameAttribute value
Output typetransistor driver
FunctionBoost/Buck
Output configurationYes, can provide isolation
Topologyfull bridge
Number of outputs6
output stage2
Voltage - Power Supply (Vcc/Vdd)3.8 V ~ 10.25 V
Frequency - Switch-
Duty cycle (maximum)0.985
Synchronous rectifieryes
Clock synchronizationyes
serial interface-
Control characteristicsCurrent limit, ramp, soft start
Operating temperature-40°C ~ 85°C(TA)
Package/casing24-SSOP (0.154", 3.90mm wide)
Supplier device packaging24-SSOP
FEATURES
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n
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.
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.
All registered trademarks and trademarks are the property of their respective owners.
n
n
n
n
n
n
n
n
n
n
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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 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
24-Pin Surface Mount GN Package
APPLICATIONS
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n
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Telecommunications, Infrastructure Power Systems
Distributed Power Architectures
Server Power Supplies
TYPICAL APPLICATION
V
IN
36V TO
72V
C
IN
R1
U1
MA
T1
LTC3722
L1
L2
MB
RCS
T2
C1
U1, U2: LTC4440 GATE DRIVER
U3: LTC3901 GATE DRIVER
U3
MF
MD
V
OUT
12V
C
OUT
MC
U2
12V
OUT
, 240W Converter Efficiency
95
36V
IN
90
EFFICIENCY (%)
48V
IN
72V
IN
85
ME
80
75
0
2
4
6
8 10 12 14 16 18 20
CURRENT (A)
372212 TA01b
372212 TA01a
Rev C
Document Feedback
For more information
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Description IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP IC REG CTRLR FULL-BRIDGE 24SSOP
Output type transistor driver transistor driver transistor driver transistor driver transistor driver - - transistor driver transistor driver transistor driver
Function Boost/Buck Boost/Buck Boost/Buck Boost/Buck Boost/Buck - - Boost/Buck Boost/Buck Boost/Buck
Output configuration Yes, can provide isolation Yes, can provide isolation Yes, can provide isolation Yes, can provide isolation Yes, can provide isolation - - Yes, can provide isolation Yes, can provide isolation Yes, can provide isolation
Topology full bridge full bridge full bridge full bridge full bridge - - full bridge full bridge full bridge
Number of outputs 6 6 6 6 6 - - 6 6 6
output stage 2 2 2 2 2 - - 2 2 2
Voltage - Power Supply (Vcc/Vdd) 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V - - 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V 3.8 V ~ 10.25 V
Duty cycle (maximum) 0.985 0.985 0.985 0.985 0.985 - - 0.985 0.985 0.985
Synchronous rectifier yes yes yes yes yes - - yes yes yes
Clock synchronization yes yes yes yes yes - - yes yes yes
Control characteristics Current limit, ramp, soft start Current limit, ramp, soft start Current limit, ramp, soft start Current limit, ramp, soft start Current limit, ramp, soft start - - Current limit, ramp, soft start Current limit, ramp, soft start Current limit, ramp, soft start
Operating temperature -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -40°C ~ 150°C(TJ) - - -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -40°C ~ 150°C(TJ)
Package/casing 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide) - - 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide) 24-SSOP (0.154", 3.90mm wide)
Supplier device packaging 24-SSOP 24-SSOP 24-SSOP 24-SSOP 24-SSOP - - 24-SSOP 24-SSOP 24-SSOP
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