NO LOAD DETECTION
First Claim
1. A method of controlling an output voltage level of a power converter, the method comprising:
- a. determining between a load condition and a no-load condition at an output of the power converter;
b. when a no-load condition is detected, artificially raising the output voltage level above a regulated output voltage level; and
c. when a load condition is detected, resuming regulation of the output voltage at the regulated output voltage level.
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Accused Products
Abstract
A power regulation control circuit is implemented as part of a power converter. The power regulation control circuit is implemented during two modes, a sleep mode and a wake-up mode. During the sleep mode, the power regulation control circuit detects a no-load presence and artificially increases the output voltage Vout to its maximum allowable value. This can be accomplished by pulling up an output of an error amplifier that feeds a PWM module. During the wake-up mode while the power converter wakes up from the sleep mode under maximum load, the output voltage Vout sinks from the artificially higher voltage, but still stays above a minimum operational voltage level. A slew rate compensation can be implemented to control a rate at which the output voltage drops when a load is applied. The artificially high output voltage during no-load condition and the slew rate compensation provide open loop voltage adjustment.
28 Citations
20 Claims
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1. A method of controlling an output voltage level of a power converter, the method comprising:
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a. determining between a load condition and a no-load condition at an output of the power converter; b. when a no-load condition is detected, artificially raising the output voltage level above a regulated output voltage level; and c. when a load condition is detected, resuming regulation of the output voltage at the regulated output voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling an output voltage level of a power converter, the method comprising:
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a. detecting a no-load condition at an output of the power converter and placing the power converter into a sleep mode of operation; b. raising the output voltage level above a regulated output voltage level; and c. when a load condition is detected, waking-up the power converter and resuming regulation of the output voltage at the regulated output voltage level. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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- 16. A power converter for regulating an output voltage supplied to a load, the power converter comprises a power regulation control circuit configured to determine between a load condition and a no-load condition at an output of the power converter, wherein when a no-load condition is detected, the power regulation control circuit is further configured to artificially raise the output voltage level above a regulated output voltage level, and when a load condition is detected, the power regulation control circuit is further configured to resume regulation of the output voltage at the regulated output voltage level.
Specification