Datasheet

3
LT1161
1161fa
Supply Current
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (mA)
20
18
16
14
12
10
8
6
4
2
0
40
1161 G01
10
20
30
50
ALL CHANNELS ON
ALL CHANNELS OFF
Automatic Restart Period
INPUT VOLTAGE (V)
0
V
GATE
– V
+
30
50
1161 G02
10 20 40
16
14
12
10
8
6
4
2
0
T
J
= 85°C
T
J
= –40°C
T
J
= 25°C
MOSFET Gate Voltage Above V
+
GATE VOLTAGE ABOVE V
+
(V)
024 8
GATE DRIVE CURRENT (µA)
100
10
1
0.1
610121416
1161 G03
V
+
≥ 24V
V
+
= 8V
V
+
= 12V
MOSFET Gate Drive Current
TEMPERATURE (°C)
–50
SUPPLY CURRENT (mA)
–25
0
25 50
1161 G04
75
20
18
16
14
12
10
8
6
4
2
0
100
V
+
= 24V
ALL CHANNELS ON
ALL CHANNELS OFF
Supply Current
TEMPERATURE (°C)
–50
INPUT THRESHOLD VOLTAGE (V)
–25
0
25 50
1161 G05
75
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
100
V
+
= 24V
TURN-ON
TURN-OFF
Input Threshold Voltage
TEMPERATURE (°C)
–50
DRAIN SENSE THRESHOLD VOLTAGE (mV)
–25
0
25 50
1161 G06
75
110
100
90
80
70
60
50
40
30
20
10
100
V
+
= 24V
Drain Sense Threshold Voltage
INPUT VOLTAGE (V)
0
TURN-ON TIME (µs)
500
450
400
350
300
250
200
150
100
50
0
40
1161 G07
10
20
30
50
IRFZ34
Turn-ON Time Driving MOSFET
INPUT VOLTAGE (V)
0
TURN-OFF TIME (µs)
100
90
80
70
60
50
40
30
20
10
0
40
1161 G08
10
20
30
50
IRFZ34
NORMAL
CURRENT LIMIT
Turn-OFF Time Driving MOSFET
TEMPERATURE (°C)
–50
10
RESTART PERIOD (ms)
100
1000
25–25 0 50 75 100
1161 G09
V
+
= 24V
C
T
= 3.3µF
C
T
= 1µF
C
T
= 0.33µF
C
T
= 0.1µF