Datasheet

4
LTC1473
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Logic Input Threshold Voltage
vs Temperature
TEMPERATURE (°C)
–50
1.0
LOGCI INPUT THRESHOLD VOLTAGE (V)
1.1
1.3
1.4
1.5
0
1.9
1473 G11
1.2
–25 25 50 75 100 125
1.6
1.7
1.8
V
HIGH
V
LOW
V
+
= 20V
Logic Input Threshold Voltage
vs Temperature
TEMPERATURE (°C)
–50
1.0
LOGIC INPUT THRESHOLD VOLTAGE (V)
1.1
1.3
1.4
1.5
0
1.9
1473 G10
1.2
–25 25 50 75 100 125
1.6
1.7
1.8
V
HIGH
V
LOW
V
+
= 5V
Timer Latch Threshold Voltage
vs Temperature
TEMPERATURE (°C)
–50
1.10
TIMER LATCH THRESHOLD VOLTAGE (V)
1.12
1.16
1.18
1.20
0
1.28
1473 G12
1.14
–25 25 50 75 100 125
1.22
1.24
1.26
V
+
= 20V
Timer Source Current
vs Temperature
TEMPERATURE (°C)
–50
4.0
TIMER SOURCE CURRENT (µA)
4.5
5.5
6.0
6.5
0
8.5
1473 G13
5.0
–25 25 50 75 100 125
7.0
7.5
8.0
V
+
= 20V
TIMER = 0V
Turn-On Delay and Gate Rise Time
vs Temperature
TEMPERATURE (°C)
–50
0
TURN-ON DELAY AND GATE RISE TIME (µs)
5
15
20
25
0
45
1473 G06
10
–25 25 50 75 100 125
30
35
40
GATE RISE
TIME
V
+
= 20V
C
LOAD
= 1000pF
V
SAB
= 0V
TURN-ON
DELAY
Turn-Off Delay and Gate Fall Time
vs Temperature
TEMPERATURE (°C)
–50
0.4
TURN-OFF DELAY AND GATE FALL TIME (µs)
0.6
1.0
1.2
1.4
0
2.2
1473 G07
0.8
–25 25 50 75 100 125
1.6
1.8
2.0
GATE FALL
TIME
V
+
= 20V
C
LOAD
= 1000pF
V
SAB
= 20V
TURN-OFF
DELAY
Rise and Fall Time
vs Gate Capacitive Loading
GATE CAPACITIVE LOADING (pF)
10
20
RISE AND FALL TIME (
µ
s)
30
40
100 1000 10000
1473 G08
10
5
25
35
15
0
RISE TIME
V
SAB
= 0V
FALL TIME
V
SAB
= 20V
Sense Pin Source Current
I
BSENSE
vs V
SENSE
V
SENSE
(V)
0
SENSE PIN CURRENT (µA)
20
1473 • TPC14
5
10
15
2.5
7.5
12.5
17.5
175
150
125
100
75
50
25
0
–25
V
+
= 20V
V
DIODE
= V
IN1
= 5V
V
IN2
= 0V
V
SENSE
+
– V
SENSE
–
= 0V