Power supply management chip for controlling two-phase Buck circuit having current equalization function based on COT

A power management chip and circuit technology, applied in the direction of control/regulation system, high-efficiency power electronic conversion, output power conversion device, etc., can solve problems such as energy loss, bad limit cycle, area waste, etc.

Active Publication Date: 2016-12-28
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, digital control inevitably introduces quantization errors, leading to undesirable limit cycles; moreover, high-precision DC converters operating at very high s

Method used

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  • Power supply management chip for controlling two-phase Buck circuit having current equalization function based on COT
  • Power supply management chip for controlling two-phase Buck circuit having current equalization function based on COT
  • Power supply management chip for controlling two-phase Buck circuit having current equalization function based on COT

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Embodiment Construction

[0034] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] like figure 2 As shown, the power management chip of the present invention is used in a large current Buck circuit occasion, and it is provided with a power input pin (V in ), the output voltage pin (V O ), ground pin (GND), and two switch SW pins (SW 1 and SW 2 ). There are reference circuit module, comparator module, voltage loop module, clock generation module, control logic and soft start module, constant on-time generation module, ripple compensation module, current sampling module and current equalization module inside the chip. Driver module and four on-chip switches Mp 1 , Mp 2 and Mn 1 , Mn 2 .

[0036] Power input pin (V in ), connected to each module in the chip to generate a power supply potential for the normal operation of ...

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Abstract

The invention discloses a power supply management chip for controlling a two-phase Buck circuit having a current equalization function based on COT. The power supply management chip is provided with a power supply input pin, an output voltage pin, a grounding pin and two switch SW pins. The chip is internally provided with a reference circuit module, a comparator module, a voltage ring module, a clock generation module, a control logic and soft start module, a constant conduction time generation module, a ripple compensation module, a current sampling module, a current equalization module, a driving module and four in-chip switching tubes. According to the power supply management chip, multiple asymmetric factors can be effectively overcome to realize current equalization so that the precision is high, the power supply management chip can work under high switching frequency, and energy loss is less and area occupation is smaller in comparison with the conventional method of digital control matching duty ratio.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a power management chip for controlling a two-phase Buck circuit with a current sharing function based on a COT. Background technique [0002] The power management chip is a chip that manages the power consumption of each module in the system, and some power management chips will be used for switching power supply circuits. A switching power supply circuit is broadly defined as a circuit that uses a semiconductor power device as a switch to change the power supply form into another form, and automatically controls the closed-loop stable output and has a protection link during the change. A switching power supply circuit generally includes a control chip and peripheral circuits. The common topologies of switching power supply circuits are: buck chopper (Buck), boost chopper (Boost), flyback, forward, half bridge and full bridge. The control methods of the...

Claims

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Application Information

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IPC IPC(8): H02M3/157H02M3/158H02M1/088H02M1/14
CPCH02M1/088H02M1/143H02M3/157H02M3/1584H02M1/0058H02M3/1586Y02B70/10
Inventor 赵梦恋张书瑜朱波秦政杨艺丹董阳涛吴晓波
Owner ZHEJIANG UNIV
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