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LNK613PG-TL Datasheet(PDF) 7 Page - Power Integrations, Inc.

Part # LNK613PG-TL
Description  Energy-Efficient, Accurate CV/CC Switcher for Adapters and Chargers
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Manufacturer  POWERINT [Power Integrations, Inc.]
Direct Link  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

LNK613PG-TL Datasheet(HTML) 7 Page - Power Integrations, Inc.

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Rev. F 01/10
7
LNK603-606/613-616
www.powerint.com
An overshoot
is acceptable
Negative ring may
increase output
ripple and/or
degrade output
regulation
Figure 6.
Desired Drain Voltage Waveform with Minimal Leakage
Ringing Undershoot.
Figure 7.
Undesirable Drain Voltage Waveform with Large Leakage
Ring Undershoot.
BYPASS pin voltage. The parameters I
S2 and VBP are provided in
the parameter table of the LinkSwitch-II data sheet. Diode D6 can
be any low cost diode such as FR102, 1N4148 or BAV19/20/21.
Quick Design Checklist
As with any power supply design, all LinkSwitch-II designs
should be verified on the bench to make sure that component
specifications are not exceeded under worst-case conditions.
The following minimum set of tests is strongly recommended:
1. Maximum drain voltage – Verify that peak V
DS does not exceed
680 V at the highest input voltage and maximum output power.
2. Maximum drain current – At maximum ambient temperature,
maximum input voltage and maximum output load, verify
drain current waveforms at start-up for any signs of trans-
PI-5116-050808
D
S
FB
BP
R2
470 k
1 k
R3
300
R5
13 k
1%
R6
9.31 k
1%
D5
1N4007
D7
SL13
TI
EE13
5
10
8
2
4
NC
3
C7
470
µF
10 V
C1
4.7
µF
400 V
C2
4.7
µF
400 V
C4
1
µF
50 V
L1
1 mH
C3
820 pF
1 kV
AC
Input
DC
Output
U1
LNK613DG
LinkSwitch-II
RF1
8.2
2 W
D1
1N4007
D2
1N4007
D3
1N4007
D4
1N4007
former saturation and excessive leading edge current spikes.
LinkSwitch-II has a leading edge blanking time of 170 ns to
prevent premature termination of the ON-cycle.
3. Thermal check – At maximum output power, both minimum
and maximum input voltage and maximum ambient tempera-
ture; verify that temperature specifications are not exceeded
for LinkSwitch-II, transformer, output diodes and output
capacitors. Enough thermal margin should be allowed for
part-to-part variation of the R
DS(ON) of LinkSwitch-II, as specified
in the data sheet. To assure 10% CC tolerance a maximum
SOURCE pin temperature of 90 ºC is recommended.
Design Tools
Up-to-date information on design tools can be found at the
Power Integrations web site: www.powerint.com
Figure 8.
LinkSwitch-II Flyback Power Supply Without Bias Supply.


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