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公开(公告)号：US09698689B2
公开(公告)日：2017-07-04
申请号：US15088789
申请日：2016-04-01
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik
CPC classification number: H02M3/158 , H02M1/34 , H02M2001/0009
Abstract: A zero-voltage switching buck converter circuit and control circuit are provided. The buck converter circuit may include a first inductor, a smoothing capacitor coupled to the first inductor, a rectifier diode coupled in parallel with the first inductor and the smoothing capacitor, a control switch coupled to the first inductor, a control circuit configured to turn the control switch off and on repeatedly at a high frequency rate; and a snubber network coupled to the first inductor and the control circuit. The snubber network may include second and third inductors connected in series, wherein one terminal of the first inductor is connected to a node connecting the second and third inductors, and an auxiliary switch connected to the control circuit. A first terminal of the second inductor that is not connected to the node may be coupled to the control switch, and a first terminal of the third inductor that is not connected to the node may be coupled to the auxiliary switch.
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公开(公告)号：US09661702B2
公开(公告)日：2017-05-23
申请号：US15051335
申请日：2016-02-23
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik , Rohit Tirumala
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0845 , Y02B20/345 , Y02B20/347
Abstract: A constant-current controller with square wave input current shaping for driving a series of light emitting diodes (LEDs) is provided. The controller may include a sample and hold circuit that samples a current sense voltage, a first multiplier circuit that multiplies an output of the sample and hold circuit, an error detector circuit that compares an output of the multiplier circuit with a reference voltage, an error amplifier that amplifies an output of the error detector circuit, a second multiplier circuit that multiplies an output of the error amplifier by a coefficient, and an output circuit that outputs a pulse-width modulated control signal based on an output of the second multiplier circuit. The coefficient may vary depending on whether the constant-current LED driver controller is used with a boost converter or a buck-boost converter.
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3.发明授权公开(公告)号：US10284095B1
公开(公告)日：2019-05-07
申请号：US16003369
申请日：2018-06-08
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik , Ioan Stoichita , Surya Talari
Abstract: A multi-phase DC-to-DC buck converter for receiving an input voltage and delivering an output voltage to a load by splitting the load current between a plurality of DC-to-DC buck converter cells. The converter includes a plurality of current sense circuits for sensing current in a respective converter cell, each of the current sense circuits configured to generate a respective current sense signal, an averaging circuit for receiving each of the respective current sense signals and generating an average signal, a plurality of imbalance detector circuits for comparing a respective current sense signal with the average signal and generating a respective current imbalance signal, and a plurality of ON time generators for activating a converter cell for a predetermined time interval and altering the predetermined time interval in accordance with a time integral of a respective current imbalance signal.
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4.发明申请公开(公告)号：US20160182131A1
公开(公告)日：2016-06-23
申请号：US14872878
申请日：2015-10-01
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik , Simon Krugly
CPC classification number: H02M3/33523 , H02M3/24 , H02M3/33576 , H04B5/00
Abstract: A communication method and apparatus that uses modulation of post-conduction oscillation frequency in switching converters is provided. The apparatus may include a converter having a magnetic element having a primary winding and a secondary winding, a first switch, a control circuit configured to repeatedly activate the first switch to couple an input voltage source to the primary winding to store electrical energy in the magnetic element, and a diode coupled to the secondary winding, said diode configured to couple the secondary winding to a load to deliver the electrical energy stored in the magnetic element, and a communication apparatus having a second switch, a first modulator capacitor coupled to the secondary winding, a first transmitter configured to activate the second switch in accordance with a first input signal, and a first receiver configured to detect a post-conduction oscillation frequency of a voltage signal at the primary or secondary windings.
Abstract translation: 提供了一种在开关转换器中使用后导通振荡频率的调制的通信方法和装置。 该装置可以包括具有初级绕组和次级绕组的磁性元件的转换器，第一开关，控制电路，被配置为重复地激活第一开关以将输入电压源耦合到初级绕组以将电能存储在磁性 元件和耦合到次级绕组的二极管，所述二极管被配置为将次级绕组耦合到负载以递送存储在磁性元件中的电能，以及具有第二开关的通信设备，耦合到次级绕组的第一调制器电容器 绕组，被配置为根据第一输入信号激活第二开关的第一发射器和被配置为检测初级或次级绕组处的电压信号的后导通振荡频率的第一接收器。
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公开(公告)号：US11444535B2
公开(公告)日：2022-09-13
申请号：US17198911
申请日：2021-03-11
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik
Abstract: An emulated peak current mode control (EPCMC) synchronous buck converter device is provided, and may include a converter having an inductor, a high-side switch, and a low-side switch, and an EPCM controller. The controller may include a PWM latch to alternately turn on and off the high-side and low-side switches, a current sense element to output a current sense voltage based on the inductor current, and a feedforward circuit to generate a feedforward voltage. The current sense element outputs a first current sense voltage while the low-side switch is turned on, and outputs a second current sense voltage while the low-side switch is turned off. The feedforward voltage is generated based on a voltage differential that represents a difference between the first current sense voltage and the second current sense voltage, and the PWM latch alternately turns on and off the high-side and low-side switches based on the feedforward voltage.
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Patent Agency Ranking
公开(公告)号：US20220200453A1
公开(公告)日：2022-06-23
申请号：US17198911
申请日：2021-03-11
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik
Abstract: An emulated peak current mode control (EPCMC) synchronous buck converter device is provided, and may include a converter having an inductor, a high-side switch, and a low-side switch, and an EPCM controller. The controller may include a PWM latch to alternately turn on and off the high-side and low-side switches, a current sense element to output a current sense voltage based on the inductor current, and a feedforward circuit to generate a feedforward voltage. The current sense element outputs a first current sense voltage while the low-side switch is turned on, and outputs a second current sense voltage while the low-side switch is turned off. The feedforward voltage is generated based on a voltage differential that represents a difference between the first current sense voltage and the second current sense voltage, and the PWM latch alternately turns on and off the high-side and low-side switches based on the feedforward voltage.
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公开(公告)号：US20170264203A1
公开(公告)日：2017-09-14
申请号：US15442886
申请日：2017-02-27
Applicant: Microchip Technology Incorporated
Inventor： Simon Krugly , Alexander Mednik , Marc Tan , Rohit Tirumala
CPC classification number: H02M3/33507 , H02M1/08 , H02M1/4258 , H02M2001/0003 , H02M2001/0009 , H02M2001/0025 , H02M2001/0054 , Y02B70/126 , Y02B70/1491
Abstract: A high power-factor buck-boost converter having a rectified low-frequency AC line voltage input and a DC output is provided. The converter may include a magnetic element, a controlled switch having a gate terminal and a drain terminal that is coupled to the magnetic element, a rectifier diode coupled to the magnetic element, an output smoothing capacitor coupled to the rectifier diode, and a control circuit having an output coupled to the gate terminal of the controlled switch for repeatedly turning the controlled switch off for a first time duration and on for a second time duration. The second time duration may be determined as a function of the first time duration immediately preceding the second time duration.
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公开(公告)号：US20160262227A1
公开(公告)日：2016-09-08
申请号：US15051335
申请日：2016-02-23
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik , Rohit Tirumala
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0845 , Y02B20/345 , Y02B20/347
Abstract: A constant-current controller with square wave input current shaping for driving a series of light emitting diodes (LEDs) is provided. The controller may include a sample and hold circuit that samples a current sense voltage, a first multiplier circuit that multiplies an output of the sample and hold circuit, an error detector circuit that compares an output of the multiplier circuit with a reference voltage, an error amplifier that amplifies an output of the error detector circuit, a second multiplier circuit that multiplies an output of the error amplifier by a coefficient, and an output circuit that outputs a pulse-width modulated control signal based on an output of the second multiplier circuit. The coefficient may vary depending on whether the constant-current LED driver controller is used with a boost converter or a buck-boost converter.
Abstract translation: 提供了一种用于驱动一系列发光二极管（LED）的方波输入电流整形的恒流控制器。 控制器可以包括对电流检测电压进行采样的采样和保持电路，将采样和保持电路的输出相乘的第一乘法器电路，将乘法电路的输出与参考电压进行比较的误差检测器电路，误差 放大器，其放大误差检测器电路的输出，将误差放大器的输出乘以系数的第二乘法器电路和基于第二乘法器电路的输出输出脉宽调制控制信号的输出电路。 该系数可以根据恒流LED驱动器控制器是用于升压转换器还是降压 - 升压转换器而变化。
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公开(公告)号：US20210367519A1
公开(公告)日：2021-11-25
申请号：US17101498
申请日：2020-11-23
Applicant: Microchip Technology Incorporated
Inventor： Surya Prakash Rao Talari , Alexander Mednik , Ioan Stoichita
Abstract: A multi-phase DC-to-DC controller is provided. The controller includes a plurality of current sense circuits that sense current in respective converter cell of the converter, and generate respective current sense signals, an averaging circuit that receives the respective current sense signals and generates an average signal, a plurality of error detector circuits that compare respective current sense signals with the average signal and generate respective voltage imbalance signals, a plurality of transconductor circuits that convert respective voltage imbalance signals to respective current imbalance signals, and a plurality of pulse width modulation (PWM) generators that output PWM signals to control respective converter cells based on a comparison between a ramp threshold voltage of the PWM generators and a PWM ramp voltage that is based on the sum of one of the respective current imbalance signals and a first current that is proportional to the input voltage.
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公开(公告)号：US10103635B2
公开(公告)日：2018-10-16
申请号：US15442886
申请日：2017-02-27
Applicant: Microchip Technology Incorporated
Inventor： Simon Krugly , Alexander Mednik , Marc Tan , Rohit Tirumala
Abstract: A high power-factor buck-boost converter having a rectified low-frequency AC line voltage input and a DC output is provided. The converter may include a magnetic element, a controlled switch having a gate terminal and a drain terminal that is coupled to the magnetic element, a rectifier diode coupled to the magnetic element, an output smoothing capacitor coupled to the rectifier diode, and a control circuit having an output coupled to the gate terminal of the controlled switch for repeatedly turning the controlled switch off for a first time duration and on for a second time duration. The second time duration may be determined as a function of the first time duration immediately preceding the second time duration.
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