Power adapter having programmable gain compensation trim
First Claim
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1. A power adapter, comprising:
- an output to supply DC power at a regulated voltage to a load;
a controller having a programmable gain compensation trim function; and
a command processor in the controller to program the gain compensation trim function to either increase the regulated voltage with increasing load current or decrease the regulated voltage with increasing load current, wherein the command processor programs the gain compensation trim function based at least in part on a pattern of current pulses detected at the output, wherein the pattern of detected current pulses correspond to a command that specifies a parameter associated with the gain compensation trim function.
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Abstract
A power adapter to supply power at an output. The power adapter has a programmable gain compensation trim function. In some examples, the gain compensation trim function is a negative gain compensation trim function, and the output of plural power adapters are connected together to form a power supply.
20 Citations
20 Claims
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1. A power adapter, comprising:
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an output to supply DC power at a regulated voltage to a load; a controller having a programmable gain compensation trim function; and a command processor in the controller to program the gain compensation trim function to either increase the regulated voltage with increasing load current or decrease the regulated voltage with increasing load current, wherein the command processor programs the gain compensation trim function based at least in part on a pattern of current pulses detected at the output, wherein the pattern of detected current pulses correspond to a command that specifies a parameter associated with the gain compensation trim function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power supply, comprising:
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at least two power adapters each having, a power output and a different nominal voltage/current curve, the power outputs of the adapters connected together; and a voltage trim function and a negative gain compensation trim function in each of the adapters, the trim functions programmable by applying a pattern of current pulses at the power output; wherein the trim functions of the adapters are individually programmed to minimize differences in the voltage/current curves of the adapters. - View Dependent Claims (13, 14, 15, 16)
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17. A method of configuring a power supply having plural power adapters, each adapter having a power output and having voltage trim and negative gain compensation trim functions programmable based at least in part on a pattern of current pulses detected at the power output, comprising:
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calibrating each adapter by, measuring the output voltage at a lower load current, modulating the lower load current to generate a voltage trim command that adjusts the output voltage to a first predetermined voltage, measuring the output voltage at a higher load current, and modulating the higher load current to generate a negative gain compensation trim command that adjusts the output voltage to a second predetermined voltage; and after the calibrating, connecting the power outputs of all the adapters together to form the power supply, wherein the first predetermined voltage is higher than the second predetermined voltage. - View Dependent Claims (18, 19, 20)
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Specification