tny274 Power Integrations, Inc., tny274 Datasheet - Page 19
tny274
Manufacturer Part Number
tny274
Description
Energy Ef?cient, Of?ine Switcher With Enhanced Flexibility And Extended Power Range
Manufacturer
Power Integrations, Inc.
Datasheet
1.TNY274.pdf
(24 pages)
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Figure 16. General Test Circuit.
Figure 17. Duty Cycle Measurement.
VOLTAGE
DRAIN
0 V
HV
NOTE: This test circuit is not applicable for current limit or output characteristic measurements.
90%
t 1
10%
S
S
S
S
EN/UV
BP/M
D
t 2
Figure 19. Current Limit Envelope.
D =
0.8
t 1
t 2
0.1 µF
PI-2048-033001
90%
2 MΩ
150 V
Figure 18. Output Enable Timing.
S1
(internal signal)
DC
EN/UV
V
470 Ω
5 W
DRAIN
t
P
MAX
=
f
OSC
1
10 V
470 Ω
S2
t P
t EN/UV
50 V
TNY274-280
PI-4079-080905
PI-2364-012699
6/06
G
19