lnk623 Power Integrations, Inc., lnk623 Datasheet - Page 10

• Manufacturer Part Number: lnk623
• Description: Energy-efficient, Off-line Switcher With Accurate Primary-side Constant-voltage Cv Control
• Manufacturer: Power Integrations, Inc.

Rev. C 12/08
The following minimum set of tests is strongly recommended:
1.
2.
10
Maximum drain voltage – Verify that peak V
680 V at highest input voltage and maximum output power.
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-
former saturation and excessive leading edge current spikes.
LinkSwitch-CV has a leading edge blanking time of 215 ns to
prevent premature termination of the ON-cycle. Verify that
the leading edge current spike is below the allowed current
limit envelope for the drain current waveform at the end of
the 215 ns blanking period.
LNK623-626
DS
does not exceed
3.
Design Tools
Up-to-date information on design tools can be found at the
Power Integrations web site: www.powerint.com
Thermal check – At maximum output power, both minimum
and maximum input voltage and maximum ambient tempera-
ture; verify that temperature specifi cations are not exceeded
for LinkSwitch-CV, transformer, output diodes and output
capacitors. Enough thermal margin should be allowed for
the part-to-part variation of the R
specifi ed in the data sheet. It is recommended that the
maximum source pin temperature does not exceed 110 °C.
DS(ON)
of LinkSwitch-CV, as
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