TOP221-227
120
100
80
t
2
t
60
1
HV
90%
90%
40
Dynamic
Impedance
1
=
t
t
DRAIN
VOLTAGE
1
2
Slope
D =
20
10%
0
0 V
0
2
4
6
8
10
CONTROL Pin Voltage (V)
PI-2039-043097
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
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
100 nS
I
@ 85VAC
tLEB
INIT(MIN)
∆ID
I
@ 265VAC
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
Time (us)
PI-2031-042397
Figure 12. Self-protection Current Limit Envelope.
Figure 13. Example of ∆ID on Drain Current Waveform with
Saturated Transformer.
C
14
12/97
POWERINT [ Power Integrations ]
