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LNK305G Datasheet(PDF) 12 Page - Power Integrations, Inc.

Part No. LNK305G
Description  Lowest Component Count, Energy Efficient Off-Line Switcher IC
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Maker  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

LNK305G Datasheet(HTML) 12 Page - Power Integrations, Inc.

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12
LNK302/304-306
G
3/05
NOTES:
A. Total current consumption is the sum of I
S1 and IDSS when FEEDBACK pin voltage is ≥2 V (MOSFET not
switching) and the sum of I
S2 and IDSS when FEEDBACK pin is shorted to SOURCE (MOSFET switching).
B Since the output MOSFET is switching, it is difficult to isolate the switching current from the supply current at the
DRAIN. An alternative is to measure the BYPASS pin current at 6 V.
C. See Typical Performance Characteristics section Figure 14 for BYPASS pin start-up charging waveform.
D. This current is only intended to supply an optional optocoupler connected between the BYPASS and FEEDBACK
pins and not any other external circuitry.
E. For current limit at other di/dt values, refer to Figure 13.
F. This parameter is guaranteed by design.
G. This parameter is derived from characterization.
H. Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to
frequency).
Figure 7. LinkSwitch-TN General Test Circuit.
PI-3490-060204
50 V
50 V
D
FB
S
S
S
S
BP
S1
470 k
S2
0.1
µF
470
5 W
PI-3707-112503
FB
tP
tEN
DCMAX
t
P
=
1
f
OSC
VDRAIN
(internal signal)
Figure 8. LinkSwitch-TN Duty Cycle Measurement.
Figure 9. LinkSwitch-TN Output Enable Timing.


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