TNY253/254/255
DC
MAX
tP
90%
t
D= 1
t2
10%
t2
HV
90%
DRAIN
VOLTAGE
0V
t1
ENABLE
tEN
1
t
P
=
for TNY253/254
2f
OSC
t =
P
1
f
OSC
for TNY255
PI-2194-062398
PI-2048-033001
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
°C
ILIMIT(MIN) @ 25
°C
1
2
3
4
5
6
7
8
Time ( s)
Figure 17. Current Limit Envelope.
Typical Performance Characteristics
BREAKDOWN vs. TEMPERATURE
PI-2213-040901
FREQUENCY vs. TEMPERATURE
PI-2238-033001
1.1
1.2
1.0
0.8
1.0
0.6
0.4
0.2
0.9
-50 -25
0
25
50
75 100 125 150
0
-50 -25
0
25
50
75
100 125
PI-2248-090198
Rev E
02/12
13
POWERINT [ POWER INTEGRATIONS, INC. ]
