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公开(公告)号：US12126262B2
公开(公告)日：2024-10-22
申请号：US18530177
申请日：2023-12-05
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
CPC分类号： H02M3/1586 , H02M1/0003 , H02M1/08 , H02M3/157 , H02M3/1584
摘要： An apparatus includes a ramp generator configured to produce a set signal for determining a phase shift between a first phase and a second phase of a power converter, a first phase on-timer configured to produce a first reset signal for determining a turn-on time of a high-side switch of the first phase of the power converter, a second phase on-timer configured to produce a second reset signal for determining a turn-on time of a high-side switch of the second phase of the power converter, and a control logic block configured to generate gate drive signals for the first phase and the second phase of the power converter based on the set signal, the first reset signal and the second reset signal.
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公开(公告)号：US20230110617A1
公开(公告)日：2023-04-13
申请号：US17498866
申请日：2021-10-12
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
摘要： An apparatus includes a ramp generator configured to produce a set signal for determining a phase shift between a first phase and a second phase of a power converter, a first phase on-timer configured to produce a first reset signal for determining a turn-on time of a high-side switch of the first phase of the power converter, a second phase on-timer configured to produce a second reset signal for determining a turn-on time of a high-side switch of the second phase of the power converter, and a control logic block configured to generate gate drive signals for the first phase and the second phase of the power converter based on the set signal, the first reset signal and the second reset signal.
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公开(公告)号：US10992231B1
公开(公告)日：2021-04-27
申请号：US16716681
申请日：2019-12-17
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
摘要： A controller includes a first timer for setting a turn-on time of a first high-side switch of a buck-boost converter, wherein the turn-on time of the first high-side switch is determined by an input voltage of the buck-boost converter, an output voltage of the buck-boost converter and a first predetermined bias voltage, a second timer for setting a turn-on time of a second low-side switch of the buck-boost converter, wherein the turn-on time of the second low-side switch is determined by the input voltage of the buck-boost converter, the output voltage of the buck-boost converter and a second predetermined bias voltage, and a valley current mode control device for setting a turn-on time of a first low-side switch and a turn-on time of a second high-side switch of the buck-boost converter.
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公开(公告)号：US10250142B1
公开(公告)日：2019-04-02
申请号：US16000757
申请日：2018-06-05
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Da Meng
摘要： The present disclosure provides a system and method for managing a four-switch BUCKBOOST converter with a combination of a Constant Off-time (COT) control and a Peak Current Mode (PCM) control. With the COT control, the four-switch BUCKBOOST converter can automatically and smoothly transition between a BUCK mode, a BUCKBOOST mode, and a BOOST mode when input voltage varies. In some implementations, the four-switch BUCKBOOST converter only requires a simple, low-power-consumption and robust system control loop compensation with the PCM control for inductor current, and, thus, eliminates the need for oscillator and slope compensation circuit. The PCM control is used to determine turn-off-timing of switches of the four-switch BUCKBOOST converter. The system control loop compensation can provide cycle-by-cycle current limit function to protect the converter and load from over-current damages.
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公开(公告)号：US20230268837A1
公开(公告)日：2023-08-24
申请号：US18141156
申请日：2023-04-28
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
CPC分类号： H02M3/1582 , H02M1/08 , H02M1/0009
摘要： An apparatus includes a buck converter portion of a buck-boost converter configured to operate under a constant on-time control scheme, wherein an on-time of a high-side switch of the buck converter portion is determined by a buck on-time timer, and a boost converter portion of the buck-boost converter configured to operate under a constant off-time control scheme, wherein an off-time of a low-side switch of the boost converter portion is determined by a boost off-time timer.
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公开(公告)号：US11705811B2
公开(公告)日：2023-07-18
申请号：US17094184
申请日：2020-11-10
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
CPC分类号： H02M3/1582 , H02M1/08 , H02M1/0009
摘要： An apparatus includes a buck converter portion of a buck-boost converter configured to operate under a constant on-time control scheme, wherein an on-time of a high-side switch of the buck converter portion is determined by a buck on-time timer, and a boost converter portion of the buck-boost converter configured to operate under a constant off-time control scheme, wherein an off-time of a low-side switch of the boost converter portion is determined by a boost off-time timer.
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公开(公告)号：US20220224234A1
公开(公告)日：2022-07-14
申请号：US17712460
申请日：2022-04-04
申请人： M3 Technology Inc.
摘要： An apparatus includes a first conversion unit configured to convert a ramp voltage signal into a ramp current signal flowing through a first resistor, a second conversion unit configured to convert a feedback voltage signal into a feedback current signal flowing through the first resistor, a third conversion unit configured to convert a control voltage signal generated by an error amplifier into a control current signal flowing through a second resistor, and a comparator having a first input coupled to the first resistor and a second input coupled to the second resistor, wherein an output of the comparator determines a turn-on of a high-side switch of a power converter.
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公开(公告)号：US11303213B2
公开(公告)日：2022-04-12
申请号：US16885492
申请日：2020-05-28
申请人： M3 Technology Inc.
摘要： A method includes converting a ramp voltage signal into a ramp current signal, a feedback signal into a feedback current signal, a reference signal into a reference current signal, and a control signal into a control current signal through a plurality of adjustable-gain units, and determining a turn-on of a high-side switch of a power converter through comparing a first control voltage and a second control voltage, wherein the first control voltage is generated based on a sum of the ramp current signal and the feedback current signal, and the second control voltage is generated based on a sum of the reference current signal and the control current signal.
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公开(公告)号：US11121632B2
公开(公告)日：2021-09-14
申请号：US16747781
申请日：2020-01-21
申请人： M3 Technology Inc.
发明人： Bo Yang , Xiaoyu Xi , David Meng
摘要： A buck-boost converter comprises generating a first ramp using a first current source having a current level proportional to an input voltage of a buck-boost converter, and a second ramp using a second current source having a current level proportional to an output voltage of the buck-boost converter, generating a first threshold voltage proportional to a difference between the input voltage and the output voltage of the buck-boost converter, and a second threshold voltage proportional to the input voltage of the buck-boost converter, terminating a gate drive signal of a first low-side switch of the buck-boost converter based upon comparing the first threshold voltage and the first ramp, and terminating a gate drive signal of a second high-side switch of the buck-boost converter based upon comparing the second threshold voltage and the second ramp.
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公开(公告)号：US11121626B2
公开(公告)日：2021-09-14
申请号：US16578758
申请日：2019-09-23
申请人： M3 Technology Inc.
摘要： A switch frequency control apparatus comprises a timer configured to receive a ramp and a threshold voltage, and generate a control signal for setting gate drive signals of a power converter, a ramp generator configured to generate the ramp through charging a ramp capacitor using a current source having a current level equal to a bias voltage divided by a resistor, and a threshold generator configured to generate the threshold voltage proportional to the bias voltage.
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