Extending On-Time for Power Converter Control

A technology of on-time and off-time, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, control/regulation system, etc., which can solve the problems of insufficient control stability, large duty cycle, disconnection time drops below the minimum, etc.

Pending Publication Date: 2021-08-13
SILANNA ASIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a constant on-time with a minimum off-time results in the largest duty cycle, which limits the maximum output voltage Vout that can be adjusted for any given input voltage Vin
As a result, the minimum off-time presents potential problems for proper voltage regulation in some applications, so variations in the off-time must not cause the off-time to drop below the minimum, resulting in insufficient control stability or Insufficient time to make good decisions, among other potential problems

Method used

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  • Extending On-Time for Power Converter Control
  • Extending On-Time for Power Converter Control
  • Extending On-Time for Power Converter Control

Examples

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Embodiment Construction

[0009] figure 1 A simplified schematic diagram of a power converter 100 for providing power to a load circuit 101 is shown, the power converter having a PWM (pulse width modulation) extension circuit 102 (i.e., a PWM signal generator) by using The on-time is kept constant and the off-time is varied to generate a PWM signal (switching signal). In addition, when the off-time of the PWM control and extension circuit 102 approaches the minimum allowable off-time, but before the off-time reaches or falls below the minimum off-time, the PWM control and extension circuit 102 extends the on-time of the PWM signal. time, thereby allowing the disconnection time to also increase. Therefore, there is a safety buffer between the point at which the PWM control and extension circuit 102 extends the on-time of the PWM signal and the minimum allowable off-time. This feature differs from prior art systems which do not include such a safety buffer, but instead do not extend the on-time until t...

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Abstract

A power transistor is switched on and off with an on-time that is held constant and an off-time that is varied. When the off-time is detected to be less than a threshold value that is greater than a minimum off-time limit, the on-time is extended. Then the power transistor is switched on and off with the extended on-time that is held constant and the off-time that varies.

Description

[0001] related application [0002] This application claims priority to U.S. Nonprovisional Patent Application No. 17 / 247,536, filed December 15, 2020, entitled "Extending On-Time for PowerConverter Control," which claims Priority to U.S. Provisional Patent Application No. 62 / 976,171, entitled "Extending On-Time for Power Converter Control," both of which are incorporated herein by reference for all purposes. Background technique [0003] Power converters generally generate a regulated output voltage Vout from a received input voltage Vin. In applications such as USB-PD (Universal Serial Bus-Power Distribution) that require driving various loads across a complex power distribution network with rapidly changing load transient distribution and a wide range of input voltage Vin and output voltage Vout, A constant on-time control architecture can be used to achieve fast load transient response with relatively simple compensation. A constant on-time architecture typically has a d...

Claims

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Application Information

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IPC IPC(8): H02M1/088H02M3/158
CPCH02M1/088H02M3/158H03K3/017H02M3/1588H02M1/0025H02M3/157Y02B70/10H02M1/0096H02M1/08H03K17/28
Inventor R.E.费斯勒W.E.拉德三世Y.R.波特拉帕利
Owner SILANNA ASIA
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