tny256 Power Integrations, Inc., tny256 Datasheet - Page 12

• Manufacturer Part Number: tny256
• Description: Energy Efficient, Low Power Off-line Switcher
• Manufacturer: Power Integrations, Inc.

Figure 14. TinySwitch General Test Circuit.
Figure 15. TinySwitch Duty Cycle Measurement.
12
VOLTAGE
DRAIN
TNY256
C
7/01
0 V
HV
NOTE: This test circuit is not applicable for current limit or output characteristic measurements.
90%
t 1
10%
D EN/UV
S
S
S
BP
S
S
t 2
D =
Figure 17. Current Limit Envelope.
1.3
1.2
1.1
1.0
0.9
0.8
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
t 1
t 2
0
PI-2048-033001
0.1 F
90%
1
t LEB (Blanking Time)
2 M
I LIMIT(MAX) @ 25 C
I LIMIT(MIN) @ 25 C
2
I INIT(MIN)
3
Time ( s)
150 V
Figure 16. TinySwitch Output Enable Timing.
4
S1
(internal signal)
EN/UV
DC
V
470
5 W
DRAIN
5
t
P
MAX
=
f
OSC
6
1
10 V
470
7
8
S2
t P
t EN/UV
50 V
PI-2352-011899
PI-2364-012699