tny253 Power Integrations, Inc., tny253 Datasheet - Page 13

• Manufacturer Part Number: tny253
• Description: Energy Efficient, Low Power Off-line Switchers
• Manufacturer: Power Integrations, Inc.

Figure 15. TinySwitch Duty Cycle Measurement.
Typical Performance Characteristics
VOLTAGE
DRAIN
BREAKDOWN vs. TEMPERATURE
1.1
1.0
0.9
0 V
HV
-50 -25
90%
Junction Temperature (°C)
0
t 1
25
10%
50
75 100 125 150
t 2
Figure 17. Current Limit Envelope.
D =
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
90%
1
t LEB (Blanking Time)
I INIT(MIN)
2
I LIMIT(MAX) @ 25 °C
I LIMIT(MIN) @ 25 °C
3
Time ( s)
Figure 16. TinySwitch Output Enable Timing.
4
DC
ENABLE
5
t
MAX
t
P
P
=
=
2f
f
OSC
6
OSC
FREQUENCY vs. TEMPERATURE
1
1
1.2
1.0
0.8
0.6
0.4
0.2
0
for TNY255
for TNY253/254
7
-50
8
-25
Junction Temperature (°C)
t P
t EN
0
25
50
TNY253/254/255
75
100 125
PI-2194-062398
4/03
D
13