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Voltage multipliers and charge pump devices. Romano Torres 6th March 2013. Step-up. Basically, uses a flying converter always connected to the input voltage:. Figure from reference [4]. Step-down. The flying capacitor is always connected to the output:. Figure from reference [4].

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Presentation Transcript
step up
Step-up
  • Basically, uses a flying converter always connected to the input voltage:

Figure from reference [4]

step down
Step-down
  • The flying capacitor is always connected to the output:

Figure from reference [4]

tft resistance
TFT resistance

Reference [5]

dickson s charge pump
Dickson’s charge-pump

Ideal gain:

Efficiency:

Figure from reference [1]

voltage doubler design
Voltage doubler design
  • Low parasitic capacitance
  • Low threshold voltage
  • Low output resistance

Figure from reference [1]

analytically
Analytically

Efficiency:

Reference [1]

analytically1
Analytically

Gain:

Output resistance:

Reference [2]

different topologies
Different topologies

Figures from reference [3]

bootstrapping
Bootstrapping
  • Possibility to use TFTs with smaller channel;
  • Could create lower parasitic capacitances and increase the voltage gain;

Figures from reference [6]

references
References
  • [1] D. Baberna, A. Cabrini, G. Torelli and M. Pasotti, “Efficiency Comparison between Doubler and Dickson Charge Pumps,” in Circuits and Systems IEEE International Symposium vol. 2, 2005, pp. 1891-1894.
  • [2] A. Cabrini, L. Gobbi and G. Torelli, “Theoretical and Experimental Analysis of Dickson Charge Pump Output Resistance,” in Circuits and Systems IEEE International Symposium, 2006, pp. 2749-2752.
  • [3] J. Starzyk. “A DC-DC Charge Pump Design based on Voltage Doublers,” in IEEE Transactions on Circuits and Systems-I: Fundamental Theory and Applications, 48:350–358, 2001.
  • [4] M. Wens and M. Steyaert. Design and Implementation of Fully-Integrated Inductive DC-DC Converters in Standard CMOS. Springer, 2011. ISBN 978-94-007-1435
  • [5] A. Saiz-Vela, P. Miribel-Català, J. Colomer, M. Puig-Vidal and J. Samitier. ”Accurate Design of Two-Phase Voltage Doublers based on a Compact Mathematical Model,” in Circuits and Systems 5th Midwest Symposium, 2007, pp. 213-216.
  • [6] Y. Allasasmeh and S. Gregori, “Switch Bootstrapping Technique for Voltage Doublers and Double Charge Pumps,” in Circuits and Systems IEEE International Symposium, 2011, pp. 494-497.