DC to DC converter and pwm controller with adaptive compensation circuit

A DC-DC and converter technology, applied in the field of DC-DC converters and PWM controllers, can solve the problems of expensive circuit board area and component cost of integrated circuit pins

Active Publication Date: 2016-01-13
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the operation of the DC-DC converter thus depends on external components to provide a compensation ramp corresponding to the operating frequency, and incorrect selection of external componen...

Method used

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  • DC to DC converter and pwm controller with adaptive compensation circuit
  • DC to DC converter and pwm controller with adaptive compensation circuit
  • DC to DC converter and pwm controller with adaptive compensation circuit

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Embodiment Construction

[0014] One or more embodiments or implementations are described below with reference to the accompanying drawings, wherein like reference numerals are used to refer to like elements throughout, and wherein various features are not necessarily drawn to scale. Accordingly, the present disclosure provides DC-DC converters and controllers, as well as integrated circuits and control methods, to achieve utility in various switching power supply applications, including, but not limited to, any suitable form of DC-DC converter, such as a Voltage converters, buck converters, buck / boost converters, CUK converters, etc. In addition, the disclosed concept can be applied in conjunction with single-phase or multi-phase DC-DC converter configurations, where multiple converter stages can be connected in parallel with each other and operated by phase-shifted synchronous clock signals, where the individual stages use this paper The frequency adaptive ramp generator circuit described provides cu...

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Abstract

DC to DC converters and PWM controllers are presented in which a slope compensation ramp signal is provided for current control operation via a frequency adaptive compensation circuit with a phase locked loop that provides a control output signal having an amplitude generally proportional to the frequency of a clock signal, and a slope generator circuit generating the slope compensation ramp signal with an amplitude generally proportional to the control output signal amplitude.

Description

technical field [0001] The present invention relates to a DC-DC converter and a PWM controller with frequency adaptive slope compensation circuitry. Background technique [0002] A DC-DC converter is a switching power supply that converts received input power to provide a controlled DC output by operating one or more switching devices. Various forms of DC-DC converters have been developed, including buck converters, which regulate the output voltage to a level substantially smaller than the input voltage, and boost converters, which are capable of providing an output voltage higher than the input voltage level. Typically, converter switching devices are operated in a closed-loop manner with pulse width modulation (PWM) for voltage-mode control, where the PWM duty cycle is adjusted based on an output voltage feedback signal. Current mode control techniques are sometimes used where an inner current control loop and an outer voltage control loop are used. One type of current ...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/00
CPCH02M3/156H02M1/0025H02M3/158H02M1/0003
Inventor P·T·班尼特R·H·贝尔S·Y·李R·K·奥彭J·蒋
Owner TEXAS INSTR INC
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