2 M鈩?/div>
50 V
10 V
0.1
碌F
150 V
NOTE:
This test circuit is not applicable for current limit or output characteristic measurements.
PI-2352-011899
Figure 14. TinySwitch General Test Circuit.
t2
t1
DC
MAX
(internal signal)
tP
90%
HV
DRAIN
VOLTAGE
90%
EN/UV
t
D= 1
t2
10%
V
DRAIN
t =
P
tEN/UV
0V
PI-2048-050798
1
f
OSC
PI-2364-012699
Figure 15. TinySwitch Duty Cycle Measurement.
Figure 16. TinySwitch Output Enable Timing.
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
0
0
tLEB (Blanking Time)
DRAIN Current (normalized)
IINIT(MIN)
ILIMIT(MAX) @ 25 藲C
ILIMIT(MIN) @ 25 藲C
1
2
3
4
5
6
7
8
Time (碌s)
Figure 17. Current Limit Envelope.
12
B
8/99
PI-2362-012699