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LT8311 Datasheet(PDF) 9 Page - Analog Devices

Part # LT8311
Description  Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller
PDF  52 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8311 Datasheet(HTML) 9 Page - Analog Devices

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LT3752/LT3752-1
9
Rev. C
For more information www.analog.com
VIN Start-Up and Shutdown Current
vs Junction Temperature
VIN(ON), VIN(OFF) Thresholds
vs Junction Temperature
VIN Quiescent Current vs Junction
Temperature
UVLO_VSEC Turn-On Threshold
vs Junction Temperature
UVLO_VSEC Hysteresis Current
vs Junction Temperature
HFB PGOOD Thresholds
vs Junction Temperature
TYPICAL PERFORMANCE CHARACTERISTICS T
A = 25°C, unless otherwise noted.
JUNCTION TEMPERATURE (°C)
–75
220
180
200
160
140
120
100
80
60
40
20
0
25
150
–25
100
3752 G01
175
0
125
–50
50 75
LT3752-1 VIN START-UP CURRENT
(VIN = VIN_ON)
LT3752/LT3752-1 VIN SHUTDOWN CURRENT
(VIN = 12V) UVLO_VSEC = 0.2V
JUNCTION TEMPERATURE (°C)
–75
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
25
150
–25
100
3752 G04
175
0
125
–50
50 75
JUNCTION TEMPERATURE (°C)
–75
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
25
150
–25
100
3752 G06
175
0
125
–50
50 75
HFB PGOOD (+) = ENABLE FORWARD
CONTROLLER CIRCUITRY
HFB PGOOD (–) = DISABLE FORWARD
CONTROLLER CIRCUITRY
JUNCTION TEMPERATURE (°C)
–75
6.0
5.5
5.0
4.5
4.0
25
150
–25
100
3752 G05
175
0
125
–50
50 75
JUNCTION TEMPERATURE (°C)
–75
8
7
6
5
4
3
2
1
0
25
150
–25
100
3752 G03
175
0
125
–50
50 75
LT3752: HOUSEKEEPING ONLY
(NO SWITCHING)
LT3752/-1: HOUSEKEEPING + FORWARD
(NO SWITCHING)
LT3752-1: HOUSEKEEPING ONLY
(NO SWITCHING)
JUNCTION TEMPERATURE (°C)
–75
10.0
9.0
9.5
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
25
150
–25
100
3752 G02
175
0
125
–50
50 75
LT3752-1 VIN_ON
LT3752-1 VIN_OFF
LT3752 VIN_ON
LT3752 VIN_OFF
HFB Reference Voltage
vs Junction Temperature
HFB OVLO Thresholds
vs Junction Temperature
JUNCTION TEMPERATURE (°C)
–75
1.30
1.25
1.20
1.15
1.10
1.05
1.00
25
150
–25
100
3752 G08
175
0
125
–50
50 75
HFB > OVLO (+) = DISABLE HOUT
SWITCHING
HFB < OVLO (–) = ENABLE HOUSEKEEPING
OPERATION
JUNCTION TEMPERATURE (°C)
–75
1.100
1.075
1.050
1.025
1.000
0.975
0.950
0.925
0.900
25
150
–25
100
3752 G07
175
0
125
–50
50 75



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