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TNY263GG View Datasheet(PDF) - Power Integrations, Inc

Part NameTNY263GG Power-Integrations
Power Integrations, Inc Power-Integrations
DescriptionEnhanced, Energy Efficient, Low Power Off-line Switcher
TNY263GG Datasheet PDF : 22 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
TNY263-268
VEN
CLOCK
DMAX
IDRAIN
VDRAIN
200
100
V
DC-INPUT
0
10
5
V
BYPASS
0
400
200
V
DRAIN
0
0
1
2
Time (ms)
Figure 11. TinySwitch-II Power-up without Optional External UV
Resistor Connected to EN/UV Pin.
PI-2661-072400
Figure 9. TinySwitch-II Operation at Very Light Load.
200
V
100
DC-INPUT
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
400
300
200
100
0
0
V
DRAIN
.5
1
Time (s)
Figure 12. Normal Power-down Timing (without UV).
200
100
V
DC-INPUT
0
200
100
V
DC-INPUT
10
0
5
V
BYPASS
400
0
300
400
200
V
DRAIN
200
V
100
DRAIN
0
0
0
1
2
0
2.5
5
Time (ms)
Time (s)
Figure 10. TinySwitch-II Power-up with Optional External UV
Resistor (2 MΩ) Connected to EN/UV Pin.
Figure 13. Slow Power-down Timing with Optional External
(2 MΩ) UV Resistor Connected to EN/UV Pin.
6
Rev. H 02/09
www.powerint.com
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