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Differential sensing for voltage control in a power supply circuit

A technology for power supply and reference voltage circuit, applied in control/regulation systems, electrical components, regulating electrical variables, etc., to solve problems such as increased power consumption, unstable control loops, and inability to provide voltage control

Active Publication Date: 2012-10-03
FAIRCHILD SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various techniques (e.g., error correction feedback loops) and / or additional components can be used to correct parasitic voltage drops, the disadvantages of using these techniques and / or additional components (e.g., increased power consumption, control loop instability etc.) are undesirable in some applications
Furthermore, some of these known solutions are not able to provide the desired level of voltage control across the semiconductor devices included in the load module in the presence of relatively wide variations in the load current.

Method used

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  • Differential sensing for voltage control in a power supply circuit
  • Differential sensing for voltage control in a power supply circuit
  • Differential sensing for voltage control in a power supply circuit

Examples

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Embodiment Construction

[0021] figure 1 is a diagram illustrating a power supply circuit 120 configured to deliver power from a power source 150 to a load module 130 (which may also be referred to as a work device). The power supply circuit 120 includes a reference voltage circuit 122 (eg, a bandgap reference circuit), a controller 124 and a power stage 126 . The power supply circuit 120 is configured to manage (eg, control, regulate) the output delivered to the load module 130 based on the reference voltage 12 and based on the feedback signal 14 (associated with the feedback control loop and defined by one or more feedback voltages). Voltage 16.

[0022] In particular, controller 124 included in power supply circuit 120 may be configured to trigger power stage 126 to deliver power from power source 150 to load module 130 or to interrupt power delivery from power source 150 to load module 130 . In some embodiments, controller 124 may include a comparator (eg, an error comparator) and / or other circ...

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PUM

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Abstract

In one general aspect, an apparatus can include a controller, and a power stage coupled to the controller and configured to be coupled to a power source. The power stage is configured to deliver an output voltage to a load module in response to the controller. The apparatus also includes a reference voltage circuit coupled to the controller and configured to be grounded to a first ground voltage different from a second ground voltage associated with the load module.

Description

[0001] Related Application Cross Reference [0002] This application claims U.S. Provisional Patent No. 61 / 468,224, filed March 28, 2011, and entitled "Differential Sensing for Voltage Control in a Power Supply" Priority and benefit of the application, and request for the application on April 7, 2011 and titled "Differential Sensing for Voltage Control in a Power Supply (Differential Sensing for Voltage Control in a Power Supply)" Priority and Benefit of US Provisional Patent Application No. 61 / 472,980, both applications are incorporated herein by reference in their entirety. [0003] This application also requests review of U.S. Serial No. 13 / 216,522, filed August 24, 2011, and entitled "Differential Sensing for Voltage Control in a Power Supply." Priority and benefit to a non-provisional patent application, the U.S. non-provisional patent application, which also seeks redress for the application filed on March 28, 2011 and entitled "Differential Sensing for Voltage Control i...

Claims

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Application Information

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IPC IPC(8): H02M3/00H02M3/156
CPCH02M3/00H02M2001/0003H02M1/0003G05F1/565G05F1/575
Inventor 赵斌杰克·科尼什维克托·李
Owner FAIRCHILD SEMICON CORP