TOP232-234
t2
t1
HV
90%
90%
DRAIN
VOLTAGE
10%
0V
Figure 31. Duty Cycle Measurement.
D = t1
t2
PI-2039-033001
120
100
80
60
40
Dynamic
Impedance
=
1
Slope
20
0
0
2
4
6
8
10
CONTROL Pin Voltage (V)
Figure 32. CONTROL Pin I-V Characteristic.
1.3
tLEB (Blanking Time)
1.2
1.1
1.0
0.9
0.8
0.7
IINIT(MIN) @ 85 VAC
0.6
IINIT(MIN) @ 265 VAC
0.5
0.4
ILIMIT(MAX) @ 25 °C
0.3
ILIMIT(MIN) @ 25 °C
0.2
0.1
0
0 1 23 45 678
Time (us)
Figure 33. Drain Current Operating Envelope.
S1
40 V
0-15 V
470 Ω
5W
100 kΩ
5-50 V
470 Ω
S2
47 µF 0.1 µF
S3
0-60 kΩ
M
D
CONTROL
C
C TOPSwitch-FX
S4
F
S
NOTES: 1. This test circuit is not applicable for current limit or output characteristic measurements.
2. For P and G packages, short all SOURCE pins together.
Figure 34. TOPSwitch-FX General Test Circuit.
PI-2538-040401
29 B
7/01