TOP412/414
TYPICAL CONTROL PIN I-V CHARACTERISTIC
120
t
2
t
100
1
HV
90%
90%
80
Latched Shutdown
Trigger Current (45 mA)
60
t
t
DRAIN
VOLTAGE
1
2
DC =
10%
40
0 V
Dynamic
Impedance
1
=
Slope
20
0
PI-1215-091794
Figure 9. TOPSwitch Duty Cycle Measurement.
0
2
4
6
8
10
CONTROL Pin Voltage (V)
Figure 10. TOPSwitch CONTROL Pin I-V Characteristic.
R1
470 Ω
5 W
S2
D
R2
470 Ω
CONTROL
C
TOPSwitch
S1
VS2
40 V
S
C1
0.1 µF
C2
47 µF
VS1
0-50 V
NOTES: 1. This test circuit is not applicable for current limit or output characteristic measurements.
2. For P package, short all SOURCE and SOURCE (HV RTN) pins together.
PI-2212-073098
Figure 11. TOPSwitch General Test Circuit.
A
4/99
12
POWERINT [ Power Integrations ]
