DC to DC converter
First Claim
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1. A DC to DC converter comprising:
- power input means for receiving power at an input voltage,current-controlled means coupled to the power input means for providing output power at a predetermined output voltage, andcontrol means providing selectively for continuous mode and intermittent mode operation of the converter, the continuous mode providing a first output current level and the intermittent mode providing a second reduced output current level,the control means sequentially actuating the current-controlled means when the converter is in said intermittent mode, wherein the current-controlled means is alternately actuated ON for a first predetermined time period and OFF for a second predetermined time period to provide the reduced power output level.
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Abstract
A DC to DC converter includes a power input for receiving power at a predetermined input voltage. The converter is current-controlled to provide output power at a predetermined output voltage and several output current levels. The converter is further selectively controlled for either continuous or intermittent mode of operation. The continuous mode provides the higher output current levels and the intermittent mode provides the lowest output current level.
68 Citations
15 Claims
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1. A DC to DC converter comprising:
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power input means for receiving power at an input voltage, current-controlled means coupled to the power input means for providing output power at a predetermined output voltage, and control means providing selectively for continuous mode and intermittent mode operation of the converter, the continuous mode providing a first output current level and the intermittent mode providing a second reduced output current level, the control means sequentially actuating the current-controlled means when the converter is in said intermittent mode, wherein the current-controlled means is alternately actuated ON for a first predetermined time period and OFF for a second predetermined time period to provide the reduced power output level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A DC to DC converter comprising:
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power input means for receiving power at an input voltage, power output means for providing power at an output voltage, and control means providing selectively for continuous mode or intermittent mode operation of the converter, the continuous mode providing a first output current level and the intermittent mode providing a second reduced output current level, the control means sequentially actuating the converter in said intermittent mode, wherein the converter is alternately actuated ON for a first predetermined time period and OFF for a second predetermined time period. - View Dependent Claims (11, 12, 13, 14)
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15. In a paging receiver having three operational states corresponding to three power levels:
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a DC to DC converter having a continuous mode of operation, the continuous mode of operation including a first state of operation providing a first output level, a second state of operation at an increased output level provided by providing higher bias current to the converter, and an intermittent mode of operation providing a third lowest state output level provided by pulsing the operation of the converter ON and OFF, the converter being alternately actuated ON for a first predetermined time period and OFF for a second predetermined time period in said intermittent mode of operation.
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Specification