Troubleshooting a Boost Converter Circuit

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SUMMARY

The forum discussion centers on troubleshooting a boost converter circuit designed to increase voltage from 4 volts to 8 volts. The user reports an output voltage of only 0.36 volts, indicating potential issues with component connections and circuit design. Key components include the TIP47G transistor, SB3100 diode, and a 120 microfarad capacitor, with the Arduino Uno controlling the switching frequency at 1204 Hz. The discussion highlights the importance of correct component placement, particularly the diode's connection, and suggests increasing the switching frequency to improve performance.

PREREQUISITES
  • Understanding of boost converter topology
  • Familiarity with Arduino Uno programming and control
  • Knowledge of transistor types, specifically NPN vs. PNP
  • Basic electronics concepts, including inductance and switching frequency
NEXT STEPS
  • Research proper diode placement in boost converter circuits
  • Learn about the differences between NPN and PNP transistors
  • Explore methods to measure inductance and saturation current
  • Investigate increasing switching frequencies in boost converters
USEFUL FOR

Electronics enthusiasts, hobbyists building DC-DC converters, and anyone troubleshooting boost converter circuits.

  • #31
The diode that stops the capacitor discharging is missing. It goes between the transistor and capacitor.
 
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  • #32
i did include a diode in the circuit. i forgot to draw the diode in the schematic. it is a 1n4004 diode. why is the circuit not working?
 
  • #33
Yes, the TIP36c is a PNP transistor. You have drawn an NPN transistor, and you need an NPN transistor in your circuit (although most circuits use an N-channel MOSFETS these days).
 
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  • #34
and i put it between the transistor and capcitor.
 
  • #35
why won't a pnp transistor work?
 
  • #37
David lopez said:
and i put it between the transistor and capcitor.

The right way around ?

redraw you circuit
 

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