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TNY264P Datasheet(PDF) 6 Page - Power Integrations, Inc.

Part # TNY264P
Description  Enhanced, Energy Effi cient, Low Power Off-line Switcher
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Manufacturer  POWERINT [Power Integrations, Inc.]
Direct Link  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

TNY264P Datasheet(HTML) 6 Page - Power Integrations, Inc.

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Rev. H 02/09
6
TNY263-268
www.powerint.com
Figure 12. Normal Power-down Timing (without UV).
Figure 13. Slow Power-down Timing with Optional External
(2 M
Ω) UV Resistor Connected to EN/UV Pin.
Figure 10. TinySwitch-II Power-up with Optional External UV
Resistor (2 M
Ω) Connected to EN/UV Pin.
Figure 11. TinySwitch-II Power-up without Optional External UV
Resistor Connected to EN/UV Pin.
PI-2661-072400
V
DRAIN
V
EN
CLOCK
D
DRAIN
I
MAX
Figure 9.
TinySwitch-II Operation at Very Light Load.
two main benefits. First, for a nominal application, this
eliminates the cost of a bias winding and associated
components. Secondly, for battery charger applications, the
current-voltage characteristic often allows the output voltage
to fall close to zero volts while still delivering power. This type
of application normally requires a forward-bias winding which
has many more associated components. With TinySwitch-II,
neither are necessary. For applications that require a very low
no-load power consumption (50 mW), a resistor from a bias
winding to the BYPASS pin can provide the power to the chip.
The minimum recommended current supplied is 750
μA. The
BYPASS pin in this case will be clamped at 6.3 V. This method
will eliminate the power draw from the DRAIN pin, thereby
0
2.5
5
Time (s)
0
100
200
400
300
0
100
200
V
DC-INPUT
V
DRAIN
0
12
Time (ms)
0
200
400
5
0
10
0
100
200
V
DC-INPUT
V
BYPASS
V
DRAIN
0
12
Time (ms)
0
200
400
5
0
10
0
100
200
V
DC-INPUT
V
BYPASS
V
DRAIN
0
.5
1
Time (s)
0
100
200
300
0
100
200
400
V
DC-INPUT
V
DRAIN


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