Device for utilizing low voltage electric current sources
First Claim
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1. A step-up DC to DC converter for use with a DC power source comprising:
- a main converter utilizing a low resistance switching element requiring a predetermined operating potential which is higher than the potential of said source, said main converter generating an output signal under control of said switching element at a predetermined voltage level higher than that of said source and at a predetermined power level;
an auxiliary converter for generating an output at at least said predetermined operating potential and at a very low power level as compared to said predetermined power level;
control means for selectively applying the output from said auxiliary converter to said switching element to control the state thereof; and
means for feeding back the output voltage level from said main converter to said control means, said control means being operative in response to said feed back level for maintaining the output voltage at said predetermined voltage level.
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Abstract
A DC to DC step-up converter is provided which employs high efficiency switching components such as MOSFET switching components in a main converter and provides a low power auxiliary converter to obtain the start up voltage required for operating the low resistance component of the main converter. A control circuit is provided which utilizes either the start up voltage from the auxiliary converter or a feedback voltage from the main converter output to provide control input to the low resistance switching devices which inputs are operative to maintain the output voltage at a desired level.
24 Citations
11 Claims
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1. A step-up DC to DC converter for use with a DC power source comprising:
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a main converter utilizing a low resistance switching element requiring a predetermined operating potential which is higher than the potential of said source, said main converter generating an output signal under control of said switching element at a predetermined voltage level higher than that of said source and at a predetermined power level; an auxiliary converter for generating an output at at least said predetermined operating potential and at a very low power level as compared to said predetermined power level; control means for selectively applying the output from said auxiliary converter to said switching element to control the state thereof; and means for feeding back the output voltage level from said main converter to said control means, said control means being operative in response to said feed back level for maintaining the output voltage at said predetermined voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification