Texas Instruments Corporation

Kuang-Yao Cheng

Wenkai Wu

Preetam Tadeparthy

Dattatreya Baragur Suryanarayana

Preetam Charan Anand Tadeparthy

Muthusubramanian Venkateswaran

Naga Venkata Prasadu Mangina

Nancy Zhang

Mayank Jain

Tetsuo Tateishi

Vikram Gakhar

Yipeng Su

Nandakishore Raimar

Biranchinath Sahu

Weidong Zhu

Hal Chen

Matthew John Ascher Schurmann

Pradeep V S R Pydah

Syed Mustafa Khelat Bari

Shuhua Zhang

A system includes a load and a switching converter coupled to the load. The switching converter includes at least one switching module and an output inductor coupled to a switch node of each switching module. The switching converter also includes a controller coupled to each switching module, where the controller is configured to adjust a pulse clock rate and a switch on-time for each switching module. The controller comprises a pulse truncation circuit configured to detect a voltage overshoot condition and to truncate an active switch on-time pulse in response to the detected voltage overshoot condition.

Switching converter with pulse truncation control

A circuit for a multi-phase power regulator including a power stage with a first phase and a second phase, the circuit including phase management circuitry coupled to the first phase and the second phase to control the first phase and the second phase, a first comparator coupled to an output of the multi-phase power regulator to compare a value of the output of the multi-phase power regulator to a first threshold value to produce a first comparison result, and phase shedding circuitry coupled to the first comparator and the phase management circuitry to control the phase management circuitry to activate or deactivate the second phase based at least partially on the first comparison result.

Multi-phase power regulator

A voltage regulator system includes a switch system including a power switch to conduct an output current through an inductor based on an input voltage and a switching signal to generate an output voltage at a load. A feedback system generates a PWM signal based on the output voltage and based on a variable reference voltage. A gate driver system generates the switching signal based on the PWM signal. The gate driver system controls the switch system to increase the output voltage at output voltage slopes in each of startup stages during startup of the voltage regulator system. A sampling system samples the output current and the output voltage during the startup of the voltage regulator system to measure each slope of the output voltage slopes at each of the respective startup stages during the startup of the voltage regulator system.

Multi-slope startup voltage regulator system

A circuit includes a phase control logic, an analog-to-digital converter (ADC), and digital logic. The phase control logic is configured to couple to a plurality of power phases of a multi-phase power supply. The digital logic is configured to couple to the phase control logic and the ADC, to receive an instruction to operate in a self-calibration mode of operation, receive a first message including a value associated with a calibrated load configured to couple to the plurality of power phases, perform a self-calibration sub-routine for each power phase of the plurality of power phases based at least partially on the received instruction, the received first message, and a signal received from the ADC, and receive a second message instructing the digital logic to store a result of the self-calibration in a memory of the circuit.

Power supply telemetry self-calibration

A control circuit for a DC-DC converter and a DC-DC converter are disclosed. The control circuit includes an integrator coupled to receive a first reference voltage and a first voltage that includes an output voltage for the DC-DC converter and to provide an integrated error signal. A first comparator is coupled to receive the first reference voltage and the first voltage and to provide a dynamic-integration signal that adjusts the integration time constant of the integrator.

Power converter with reduced undershoot and overshoot during load transients

A multiphase DC-DC converter includes a first phase circuit including a higher inductance inductor and a second phase circuit including a lower inductance inductor. An output of the inductors are tied together providing a Vout. A phase manager and current sharing (PMCS) block receives a feedback signal from a feedback network coupled between Vout and the PMCS block that receives current feedback from phase circuits. The PMCS block generates driver control signals at a first time when a load is requesting a lower load current for controlling the phase circuits to operate with a first current sharing ratio to provide the lower load current, and at a second time when the load is requesting a higher load current controls the phase circuits to operate at a second current sharing ratio that is different from the first current sharing ratio having a higher average second phase circuit current.

Multiphase DC-DC converter with configurable current sharing and phase management

The disclosure provides an over-current protection circuit. A signal generating block in the over-current protection circuit generates one or more input voltages, a summed voltage and an average voltage in response to one or more differential voltages. A control block generates one or more control signals in response to the one or more input voltages and the average voltage. An analog control loop block generates an initiation signal in response to the summed voltage and an output voltage. A phase control logic block generates one or more PWM (pulse width modulated) signals in response to the initiation signal and the one or more control signals.

Over-current protection in multiphase DC-DC switching regulators

Methods and apparatus to improve a transient response of a multi-phase voltage regulator are disclosed. An example apparatus includes a differential amplifier to compare a first voltage to a droop voltage, the first voltage corresponding to a sum of inductor currents in the multi-phase voltage regulator, the droop voltage corresponding to an output voltage of the multi-phase voltage regulator; and output a first control voltage based on the comparison; a differentiator to compute a derivative of the droop voltage and adjust a ramp voltage with the derivative of the droop voltage to generate a second control voltage; and a comparator to compare a reference voltage with a second voltage, the second voltage being a combination of the first control voltage and the second control voltage; and when the second voltage is greater than the reference voltage, output a voltage pulse.

Methods and apparatus to improve transient performance in multiphase voltage regulators

One embodiment includes a power regulator system. The system includes a switch control stage configured to generate at least one activation signal based on a pulse-width modulation (PWM) signal and to control a respective at least one switch to generate an output voltage. The system also includes a feedback stage configured to generate the PWM signal based on a ramp signal and a feedback voltage that is based on the output voltage. The system further includes a ramp generator stage configured to adaptively generate the ramp signal based on the output voltage and based on the at least one activation signal.

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Bedford, NH, United States of America

Kuang-Yao Cheng