IC OFFLINE SWIT OCP 8DIP

LNK306PN

Manufacturer Part NumberLNK306PN
DescriptionIC OFFLINE SWIT OCP 8DIP
ManufacturerPower Integrations
SeriesLinkSwitch®-TN
TypeOff Line Switcher
LNK306PN datasheet
 


Specifications of LNK306PN

Output IsolationNon-IsolatedFrequency Range62 ~ 70kHz
Voltage - Output700VPower (watts)12mW
Operating Temperature-40°C ~ 150°CPackage / Case8-DIP (0.300", 7.62mm), 7 Leads
Output Voltage12 VInput / Supply Voltage (max)265 VAC
Input / Supply Voltage (min)85 VACDuty Cycle (max)72 %
Switching Frequency66 KHzSupply Current250 uA
Operating Temperature Range- 40 C to + 150 CMounting StyleThrough Hole
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names596-1027-5
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RF1
D3
AC
C4
INPUT
D4
Optimize hatched copper areas (
) for heatsinking and EMI.
Figure 6a. Recommended Printed Circuit Layout for LinkSwitch-TN in a Buck Converter Confi guration using P or G Package.
D3
RF1
AC
C4
INPUT
D4
Figure 6b. Recommended Printed Circuit Layout for LinkSwitch-TN in a Buck Converter Confi guration using D Package
to Bottom Side of the Board.
cycles are skipped. To provide overload protection if no cycles
are skipped during a 50 ms period, LinkSwitch-TN will enter
auto-restart (LNK304-306), limiting the average output power
to approximately 6% of the maximum overload power. Due to
tracking errors between the output voltage and the voltage across
C3 at light load or no load, a small pre-load may be required
(R4). For the design in Figure 5, if regulation to zero load is
required, then this value should be reduced to 2.4 kΩ.
Key Application Considerations
LinkSwitch-TN Design Considerations
Output Current Table
Data sheet maximum output current table (Table 1) represents
the maximum practical continuous output current for both
mostly discontinuous conduction mode (MDCM) and continuous
conduction mode (CCM) of operation that can be delivered from
a given LinkSwitch-TN device under the following assumed
conditions:
LinkSwitch-TN
L2
D
S
C5
S
L2
D
S
S
S
FB
S
BP
C5
C1
R3
Optimize hatched copper areas (
) for heatsinking and EMI.
1) Buck converter topology.
2) The minimum DC input voltage is ≥70 V. The value of
input capacitance should be large enough to meet this
criterion.
3) For CCM operation a KRP* of 0.4.
4) Output voltage of 12 VDC.
5) Effi ciency of 75%.
6) A catch/freewheeling diode with t
MDCM operation and for CCM operation, a diode with
≤35 ns is used.
t
rr
7) The part is board mounted with SOURCE pins soldered
to a suffi cient area of copper to keep the SOURCE pin
temperature at or below 100 °C.
*KRP is the ratio of ripple to peak inductor current.
LinkSwitch-TN Selection and Selection Between
MDCM and CCM Operation
Select the LinkSwitch-TN device, freewheeling diode and output
inductor that gives the lowest overall cost. In general, MDCM
LNK302/304-306
FB
D2
R1
BP
C1
S
L1
C3
R3
C2
S
D1
PI-3750-121106
L1
D1
C3
D2
C2
R1
PI-4546-011807
≤75 ns is used for
rr
+
DC
OUTPUT
+
DC
OUTPUT
2-5
5
Rev. I 11/08