LNK6776V View Datasheet(PDF) - Power Integrations, Inc
Part Name
Description
MFG CO.
LNK6776V
Power Integrations, Inc
'LNK6776V' PDF : 24 Pages View PDF
LinkSwitch-HP
Layout Considerations for eDIP-12B package
The schematic extract in Figure 13 is an example of LinkSwitch-HP
1.
C9
Maximum drain voltage – V1enFrify that VDS
250 VAC
675 V for LNK677X series and 600 V for
R10
do110%eΩs 4n7Co01t0pFexceed
LN1/8KW6X2600XV series.
used in a dual output LCD monitor supply using eDIP-12B
This gives a 50 V margin 6for d1e2sign variations.
package. In this design the exposed metal tab on the topside
of package is left open (no heat sink). The SOURCE pins of
LinkSwitch-HP provide heat sinking through connection to the
source copper pad of PCB. This technique is adequate for
device dissipation up to 0.85 W (1/2 square inch of coBpR1per area
DF06M
required). The layout guidelines described for eSIP-76C00 Vare the
same for eDIP-12B with an added consideration about sensitive
2.
3.
UbThen3Rledok1Ωrewmr ata1hl0l1Rlec0%2cΩhsoepnce1dk01Rc0%i3ti–ΩifoieAndst ,aratbhtseeodmlumtaeaxximmimauxumimmDuormuatinprauct31tiRu1n00%1pBrgΩ2rQoesD1w0n3.407CteP01Bsr5p,FFhmouinldimbuem
itcnhopePm6u1KmVtp3ER01voa13Voxn0Alietmangut emin61a30tCanh03nlldVeFowdmeeasdxigitmne.mumOpefarpma7a,8tburtriiecenuitslatrneiommtppeB1eo/3x84rrc0WatLDeatB4uen-21rdc03e0ee-,FVdivseforirfyatnhy(3a8F.2C5te01r×r3µit4LFe.24B5emadm)
C11
220 µ
35 V
checking the temperature rise of the major power conversio6n.3 V
component layout. The return referenced components C4, C8,
C16, R9, R7 must be placed directly under the LinkSwitch-HP
package as shown in Figure 14. This requiresL1that these
particular components be SMD type as this 1a0llmoHws an ideal
C2
components 2sR0u4Ωch as transform9,10er, output diodes, input
bridge, primar1y%clamp circuit an3 d LinkSwDit2ch-HP. Under the
stated
should
cnoontdeitxiDocLenD4e19s3d7ab1o1v0e°,CL.inkSwitch-HBPAV7t2-a1FWbS-te22m2C56µVpF erature6.9R85kΩ
C14
820 µ
6.3 V
47 µF
5
1
1%
noise-immune layout.
Output Power Table Assumptions
C1
100 nF
310 VAC
450 V
T1
EF25
R8
46.4 kΩ
1%
1/16 W
1/8 W
• 12 V output.
F1
2A
RT1
5Ω
tO
• Schottky rectification.
• 82% efficiency.
90 - 265
VAC
• VOR = 135 V.
J1-3
J1-1
• KP = 0.4 for 85-265 VAC input and KP = 0.6 for 195-265 VAC
input.
• VMIN = 100 V for 85-265 VAC input and VMIN = 250 V for
195-265 VAC input.
• 0.85 W device dissipation for open frame designs with PCB
heat sink.
Quick Design Checklist
D
LinkSwitch-HP
U1
LNK6774V
S
R6
C4*
23.2 kΩ
1%
1/16 W
BP
CONTROL
FB
PD CP
R7
100 kΩ
1%
1/16 W
C7
100 nF
25 V
C16
10 pF
50 V
C8
100 pF
50 V
*Optional
R9
10.5 kΩ
1%
1/16 W
C5
4.7 µF
10 V
PI-6860-120312
PI-6860-120312
Figure 13. 17 W LCD Monitor Supply (+18 V, +5 V).
All LinkSwitch-HP designs should be verified on the bench
particularly for specified worst-case stress conditions. The
following set of tests are strongly recommended:
Figure 14. Layout for LCD Monitor Supply using eDIP-12B Package.
www.power.com
11
Rev. E 06/15
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