LTC1922-1 Datasheet PDF - Linear
| Part Number | LTC1922-1 | |
| Description | Synchronous Phase ModEGZ12DCFulated Full-Bridge Controller | |
| Manufacturers | Linear | |
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There is a preview and LTC1922-1 download ( pdf file ) link at the bottom of this page. Total 24 Pages | ||
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LTC1922-1
Synchronous Phase
Modulated Full-Bridge Controller
FEATURES
DESCRIPTIO
s Adaptive DirectSenseTM Zero Voltage Switching
s Integrated Synchronous Rectification Control for
Highest Efficiency
s Output Power Levels from 50W to Kilowatts
s Very Low Start-Up and Quiescent Currents
s Compatible with Voltage Mode and Current Mode
Topologies
s Programmable Slope Compensation
s Undervoltage Lockout Circuitry with 4.2V Hysteresis
and Integrated 10.3V Shunt Regulator
s Fixed Frequency Operation to 1MHz
s 50mA Outputs for Bridge Drive and Secondary Side
Synchronous Rectifiers
s Soft-Start, Cycle-by-Cycle Current Limiting and
Hiccup Mode Short-Circuit Protection
s 5V, 15mA Low Dropout Regulator
s 20-Pin PDIP and SSOP Packages
U
APPLICATIO S
s Telecommunications, Infrastructure Power Systems
s Distributed Power Architectures
s Server Power Supplies
s High Density Power Modules
The LTC®1922-1 phase shift PWM controller provides all
of the control and protection functions necessary to imple-
ment a high performance, zero voltage switched, phase
shift, full-bridge power converter with synchronous recti-
fication. The part is ideal for developing isolated, low
voltage, high current outputs from a high voltage input
source. The LTC1922-1 combines the benefits of the full-
bridge topology with fixed frequency, zero voltage switch-
ing operation (ZVS). Adaptive ZVS circuity controls the
turn-on signals for each MOSFET independent of internal
and external component tolerances for optimal perfor-
mance.
The LTC1922-1 also provides secondary side synchro-
nous rectifier control. The device uses peak current mode
control with programmable slope comp and leading edge
blanking.
The LTC1922-1 features extremely low operating and
start-up currents to simplify off-line start-up and bias
circuitry. The LTC1922-1 also includes a full range of
protection features and is available in 20-pin through hole
(N) and surface mount (G) packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
DirectSense is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
BIAS
SUPPLY
VIN
48V
LTC1922-1
VOUT
3.3V
ISOLATED
FEEDBACK
Efficiency
100
90
VIN = 48V
80
VIN = 36V
70
60
0
10 20 30
LOAD CURRENT (A)
40
1922 • TA01b
1922 TA01a
1
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| |
 
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1922-1
Start-Up ICC vs Temperature
160
150
140
130
120
110
100
90
80
70
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
1922 • G10
Delay Hysteresis Current vs
Temperature
1.278
SBUS = 1.5V
1.276
1.274
1.272
1.270
1.268
1.266
1.264
1.262
1.260
1.258
1.256
–55 –25
5
35 65 95 125
TEMPERATURE (°C)
1922 • G11
Slope Current vs Temperature
130
120 CT = 3.0V
110
100
90
80
70
60 CT = 1.5V
50
40
–55 –25
5
35 65 95 125
TEMPERATURE (°C)
1922 • G12
VCC Shunt Voltage vs Temperature
10.5
ICC = 10mA
10.4
10.3
10.2
10.1
10.0
9.9
9.8
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
1922 • G13
Delay Pin Threshold vs
Temperature
2.4
2.3 SBUS = 2.25V
2.2
2.1
2.0
1.9
1.8
1.7
1.6
SBUS = 1.5V
1.5
1.4
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
1922 • G14
FB Input Voltage vs Temperature
1.202
1.201
1.200
1.199
1.198
1.197
1.196
1.195
1.194
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
1922 • G15
Ramp Offset Voltage vs
Temperature
390
385
380
375
370
365
360
355
350
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
1922 • G16
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTC1922-1 electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LTC1922-1.PDF Datasheet ] | |
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