DAK-21A Power Integrations, DAK-21A Datasheet - Page 18

• Manufacturer Part Number: DAK-21A
• Description: KIT DESIGN ACCELERATOR DPA SW
• Manufacturer: Power Integrations
• Series: DPA-Switch®r

Specifications of DAK-21A

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 5V
• Current - Output: 6A
• Voltage - Input: 36 ~ 72V
• Regulator Topology: Buck
• Frequency - Switching: 400kHz
• Board Type: Fully Populated
• Utilized Ic / Part: DPA423, DPA424, DPA425, DPA426
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4. Thermal check – At maximum output power, minimum
Design Tools
Up-to-date information on design tools is available at the Power
Integrations website: www.powerint.com.
18
input voltage and maximum ambient temperature, verify
that temperature specifications are not exceeded for the
transformer, output diodes, output inductors and output
capacitors. The DPA-Switch is fully protected against
overtemperature conditions by its thermal shutdown
feature. It is recommended that sufficient heat sinking is
provided to keep the tab temperature at or below 115 °C
under worst case continuous load conditions (at low input
voltage, maximum ambient and full load). This provides
adequate margin to minimum thermal shutdown temperature
(130 °C) to account for part-to-part R
monitoring tab temperature, note that the junction-to-case
thermal resistance should be accounted for when estimating
die temperature.
C
7/04
AN-31
DS(ON)
variation. When
References
[1] Ferroxcube (formerly Philips) core supplier –
www.ferroxcube.com.
[2] TDK cores supplier – www.component.tdk.com/ components/
ferrite.asp.
[3] AVX (Thompson) core supplier - www.avxcorp.com.
[4] M. Domb, R. Redl, and N.O. Sokal. “Nondissipative turn-off
snubber in a forward converter: analysis, design procedure, and
experimental verification,” Official Proceedings of the Tenth
International PCI ʻ85 Conference, pp. 54-68.
[5] T. Ninomiya, T. Tanaka, and K. Harada, “Analysis and
optimization of a nondissipative LC turn-off snubber,” IEEE
Transactions on Power Electronics, Vol. 3, No. 2, April 1988,
pp. 147-156.