LT1641-1 データシートの表示（PDF） - Linear Technology
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LT1641-1 Datasheet PDF : 12 Pages
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LT1641-1/LT1641-2
AC ELECTRICAL CHARACTERISTICS TA = 25°C, VCC = 24V
SYMBOL
tPHLON
tPLHON
tPHLFB
tPLHFB
tPHLSENSE
PARAMETER
ON Low to GATE Low
ON High to GATE High
FB Low to PWRGD Low
FB High to PWRGD High
(VCC – SENSE) High to GATE Low
CONDITIONS
Figures 1, 2
Figures 1, 2
Figures 1, 3
Figures 1, 3
Figures 1, 4
MIN TYP MAX UNITS
6
µs
1.7
µs
3.2
µs
1.5
µs
0.5
1
2
µs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
TYPICAL PERFOR A CE CHARACTERISTICS
ICC vs VCC
3.5
3.0
85°C
25°C
2.5
–45°C
2.0
1.5
1.0
0.5
0
0
20
40
60
80 100
VCC (V)
1641-1 G01
FB Pin High Voltage Threshold vs
Temperature
1.335
1.330 VCC = 48V
1.325
1.320
1.315
1.310
1.305
1.300
1.295
1.290
1.285
1.280
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
1641-1 G04
ICC vs Temperature
3.0
48V
2.5
24V
2.0
1.5
1.0
0.5
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1641-1 G02
FB Pin Low Voltage Threshold vs
Temperature
1.250
1.245
VCC = 48V
1.240
1.235
1.230
1.225
1.220
1.215
1.210
1.205
1.200
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
1641-1 G03
FB Pin Hysteresis vs Temperature
0.100
0.095
0.090
VCC = 48V
0.085
0.080
0.075
0.070
0.065
0.060
0.055
0.050
0.045
0.040
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
1641-1 G05
IGATE Pull Up vs Temperature
–5
–6 VCC = 48V
–7
–8
–9
–10
–11
–12
–13
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1641-1 G06
164112fc
3
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