Datasheet

LT1768
5
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Switching Frequency vs Temperature
TEMPERATURE (°C)
400
390
380
370
360
350
340
330
320
310
300
SWITCHING FREQUENCY (kHz)
1768 G10
–50 –25 0 25
50
75
100 125
TEMPERATURE (°C)
124
120
116
112
108
104
100
96
92
88
84
PWM FREQUENCY (Hz)
1768 G11
–50 –25 0 25
50
75
100 125
C
T
= 0.22µF
V
PWM
= 2.5V
TEMPERATURE (°C)
0.250
0.225
0.200
0.175
0.150
0.125
0.100
0.75
0.50
0.25
0
FAULT VOLTAGE (V)
1768 G12
–50 –25 0 25
50
75
100 125
I
DIO1
= 0µA
I
DIO2
= 0µA
I
FAULT
= 1mA
I
FAULT
(mA)
0
450
400
350
300
250
200
150
100
1.5 2.5
1768 G13
0.5 1.0
2.0 3.0 3.5
FAULT VOLTAGE (mV)
I
DIO1
= 0µA
I
DIO2
= 0µA
TEMPERATURE (°C)
50
45
40
35
30
25
20
15
10
5
0
SENSE CURRENT (µA)
1768 G14
–50 –25 0 25
50
75
100 125
V
SENSE
= 0V
TEMPERATURE (°C)
15.00
14.50
14.00
13.50
13.00
12.50
12.00
11.50
11.00
10.50
10.00
GATE CLAMP VOLTAGE (V)
1768 G15
–50 –25 0 25
50
75
100 125
I
GATE
= –10mA
V
IN
= 24V
V
IN
= 12V
FAULT Pin Saturation Voltage vs
Current
Maximum Gate Voltage vs
Temperature
Sense Pin Bias Current vs
Temperature
PWM Frequency vs Temperature
FAULT Pin Saturation Voltage vs
Temperature
DIO CURRENT (mA)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
DIO VOLTAGE (V)
1768 G24
2468
10
12
14 16 18 200
V
C
CURRENT (µA)
3.75
3.74
3.73
3.72
3.71
3.70
3.69
3.68
3.67
3.66
3.65
V
C
CLAMP VOLTAGE (V)
1768 G25
0 50 100 150
200
250
300 350 400 450 500
VC Clamp Voltage vs CurrentDIO Pin Voltage vs Current
DIO CURRENT (mA)
–2.0
–1.8
–1.6
–1.4
–1.2
–1.0
–0.8
–0.6
–0.4
–0.2
0
DIO VOLTAGE (V)
1768 G20
–2 –4 –6 –8
–10
–12
–14 –16 –18 –200
DIO Pin Voltage vs Current