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Multi-phase voltage stabilizer for phase current testing in slope current mode

A technology of ramp current and phase current, which is applied in the direction of instruments, regulating electrical variables, control/regulation systems, etc., and can solve problems such as unavailable and complex fault protection

Inactive Publication Date: 2020-08-25
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most conventional systems provide simple fault protection based on voltage, current, power, and temperature monitoring, but cannot provide complex fault protection against more subtle or difficult-to-detect problems with the regulator's proper operation, whereas A proposed multi-phase voltage regulator for phase current testing in ramp current mode

Method used

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  • Multi-phase voltage stabilizer for phase current testing in slope current mode
  • Multi-phase voltage stabilizer for phase current testing in slope current mode
  • Multi-phase voltage stabilizer for phase current testing in slope current mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment One: The self-test unit 204 includes a ripple current fault monitor 410 that analyzes the input to the current balancing circuit 240, as indicated by the single dashed line leading to the ripple current fault monitor 410, at During normal operation of a multi-phase switching regulator, the phase current should increase or decrease depending on the state of the power switch, and the output phase 102 in normal operation will always have some ripple current, due to the synchronous switching characteristics of the regulator, the ripple current The ripple current pattern is well known and easily identifiable in the current sense waveform, the ripple current can change from DCM to CCM, so the ripple current fault monitor 410 should be aware of the mode of operation, there is no way to detect the expected ripple current pattern and the expected Amplitude current ripple can be caused by bad driver 106, output stage transistors, inductors, or current sense network 234....

Embodiment 2

[0045]Embodiment two: the self-test unit 204 includes a ramp current fault monitor 420, and the ramp current fault monitor 420 analyzes the output of the dynamic voltage conversion circuit (DVID) 216 and the channel current circuit 238, which is led to the ramp current fault monitor 420 The two dashed lines indicate that the start-up of a multiphase regulator can be used to determine a typical profile of the start-up ramp current, e.g., with a desired upper and lower limit depending on the start-up rate and total output capacitance, and a voltage range at which In the range where the load 104 is not expected to turn on, for example, the operating voltage of the integrated circuit is minimal, the ramp current fault monitor 420 checks the start-up ramp to Determine if the current is within the expected range. Changes in current distribution can indicate problems such as bad driver 106, output phase transistors, inductors, current sense network 234, or leaky output capacitors. Ram...

Embodiment 3

[0046] Embodiment three; self-test unit 204 includes phase sequence fault monitor 430, and phase sequence fault monitor 430 analyzes the output of phase current (IP1, IP2, ..., IPN) and dynamic voltage conversion circuit (DVID), such as leading to phase Represented by the four dashed lines of sequence fault monitor 430, the multiphase regulator can operate in single-phase mode, wherein only one output phase 102 is active and regulates the output, and phase sequence fault monitor 430 controls one or more output phases 102 at a time. Sequenced to test whether each output phase 102 is functioning properly, thereby ensuring that each output phase 102 is functioning properly, the phase sequence fault monitor 430 determines whether the corresponding monitored phase current responds in a predetermined (expected) manner, according to one embodiment, Phase Sequence Fault Monitor 430 monitors phase currents and output voltages (Vsense) during the sequencing of output phases 102, for exam...

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PUM

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Abstract

The invention discloses a multiphase voltage stabilizer for carrying out phase current testing in a slope current mode and belongs to the technical field of multiphase voltage stabilizers. The multiphase voltage stabilizer comprises a multiphase regulator, wherein the multiphase regulator comprises a power stage 100, wherein the power stage 100 comprises a plurality of output phases 102 and a controller 200 used for controlling the power stage 100, and the controller 200 is provided with a self-test unit. The stabilizer is used for identifying the condition that the multiphase regulator cannotwork normally, therefore, the regulator is prevented from suffering from major faults during working, a controller of the multiphase regulator uses a complex method to execute self-checking of the regulator; the abnormal operation condition is detected by checking the available information in the controller, alternatively, the controller may detect a number of fault conditions in which the multiphase regulator may still provide regulation in some cases, but may fail when operating conditions change, or operate the system using a particular operating mode to detect abnormal operating conditions in which the controller may detect many fault conditions.

Description

technical field [0001] The invention belongs to the technical field of multiple voltage stabilizers, in particular to a multi-phase voltage stabilizer for phase current testing in a ramp current mode. Background technique [0002] Switching power supplies or voltage regulators are popular for high power applications due to their high efficiency and small area / volume footprint of such regulators. Widely used switching regulators include buck, boost, buck-boost, forward, flyback, half-bridge, full-bridge, and SEPIC topologies. Multiphase buck converters are ideal for delivering high currents at the low voltages required by high-performance integrated circuits such as microprocessors, graphics processors, and network processors. Buck converters are typically implemented with active components such as pulse width modulation (PWM) controller ICs (integrated circuits), drivers, power MOSFETs (metal oxide semiconductor field effect transistors), and passive components such as indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 郑力玻尚海燕
Owner XI'AN PETROLEUM UNIVERSITY
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