CONTROLLERS FOR DC/DC CONVERTER
First Claim
1. A DC/DC converter, operable for converting a DC input voltage to a DC output voltage and for charging a battery, wherein the DC/DC converter comprises:
- a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control a switching circuitry and to adjust the output voltage level; and
a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates an amount of a battery charging current.
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Accused Products
Abstract
A DC/DC converter converts an input DC voltage to an output DC voltage and charges a battery. The DC/DC converter includes: a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control switching circuitry and to adjust the output voltage level; and a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates the amount of a battery charging current.
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Citations
18 Claims
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1. A DC/DC converter, operable for converting a DC input voltage to a DC output voltage and for charging a battery, wherein the DC/DC converter comprises:
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a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control a switching circuitry and to adjust the output voltage level; and a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates an amount of a battery charging current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery charging controller, operable for controlling the charging of a battery by a DC/DC converter, wherein the DC/DC converter converts a DC input voltage to a DC output voltage, and wherein the battery charging controller comprises:
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a first error amplifier, operable for comparing the difference between a first detection signal indicative of the output voltage and a second detection signal indicative of a battery voltage and a reference current signal indicative of a target value for a battery charging current, wherein the difference between the first detection signal and the second detection signal indicates an amount of the battery charging current; a second error amplifier, operable for comparing the second detection signal and a reference voltage signal indicative of a target value for the battery voltage; and a bias current source, coupled to the first error amplifier and the second error amplifier, that is operable for adjusting a loop control signal according to the comparison results of the first error amplifier and the second error amplifier, thus adjusting a target value for the output voltage so that a DC/DC controller coupled to the battery charging controller accordingly adjusts the output voltage. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A battery charging control method, comprising:
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comparing, by a first error amplifier, the difference between a first detection signal indicative of a level of an output voltage and a second detection signal indicative of level of a battery voltage and a reference current signal indicative of a target value for a battery charging current, the output voltage converted from an input voltage by a DC/DC converter, wherein the difference between the first detection signal and the second detection signal indicates an amount of the battery charging current; comparing, by a second error amplifier, the second detection signal and a reference voltage signal indicative of a target value for the battery voltage; and adjusting, by a bias current source coupled to the first error amplifier and the second error amplifier, a loop control signal according to the comparison results of the first error amplifier and the second error amplifier, thus adjusting a target value for the output voltage so that a DC/DC controller coupled to the battery charging controller accordingly adjusts the level of the output voltage. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification