A dcdc converter circuit that will work in special applications and gives 3.3 volt output, the biggest advantage is that the input voltage is high (36 volts to 72 volts dc), the converter circuit is based on the Powerint production DPA-Switch DPA423G integrated circuit, and the circuit is built with very few materials. All the details about the DCDC converter circuit (in English), material list, transformer information, etc. are available.
Below is the information about the temperature given by the circuit at full load with 48 volt input and its performance is quite good
DPA423G Features
• High efficiency, low cost, low component count solution
• Ideal as a backup supply in a larger 48 V input system
• DPA-Switch IC integrated
− PWM controller and 220 V MOSFET switching device
− Accurate 400 kHz clipped internal oscillator
− Accurate OV/UV protection
− Hysteretic thermal shutdown
− Overload, open loop and short circuit protection
− Loop skip for no-load regulation with minimum load
• Compact 1.85″ × 1″, low total height 0.9″, two-layer PCB
• 100% surface mount construction
Circuit Description
Shows a DC input flyback converter using the DPA423G. The device operates at 400 kHz. The circuit is designed for the standard nominal 48 V 36-72 VDC telecom input voltage range. By using the flyback topology, the board achieves excellent operating efficiency while minimizing size, parts count, and cost
Password: 320volt.com
Published: 2011/03/19 Tags: dc dc converter circuit, power electronic projects
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