TOP221-227
120
100
80
t
2
t
1
HV
90%
90%
60
40
t
t
DRAIN
VOLTAGE
1
2
D =
Dynamic
Impedance
1
=
Slope
20
10%
0 V
0
0
2
4
6
8
10
PI-2039-040401
CONTROL Pin Voltage (V)
Figure 10. TOPSwitch Duty Cycle Measurement.
Figure 11. TOPSwitch CONTROL Pin I-V Characteristic.
t
(Blanking Time)
LEB
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
100 ns
tLEB
I
@ 85 VAC
INIT(MIN)
∆ID
I
@ 265 VAC
INIT(MIN)
DRAIN
CURRENT
I
I
@ 25 °C
@ 25 °C
LIMIT(MAX)
LIMIT(MIN)
0
0 A
0
1
2
3
4
5
6
7
8
PI-2031-040401
Time (µs)
Figure 12. Self-protection Current Limit Envelope.
Figure 13. Example of ∆ID on Drain Current Waveform with
Saturated Transformer.
D
7/01
14
POWERINT [ Power Integrations ]
