公开(公告)号：US20140282349A1

公开(公告)日：2014-09-18

申请号：US14028792

申请日：2013-09-17

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Roger Feng ,  Junxiao Chen ,  Bin Shao

IPC: G06F17/50

CPC classification number: G06F17/5063 ,  G06F2217/78

Abstract: A method can reuse at least one pin in demultiplexing (demuxing) a voltage from a pin. The method can be used to set an accurate current limit threshold in a design for test (DFT) phase and, thus, to accurately set a trimming code of a current limiter. The method uses the property that a power MOSFET has almost a same conductive resistance at a large drain current. Thus, the current limit threshold can be set according to an accurate drain-to-source voltage Vds at a small current sink that is less than a maximum current that ATE is able to provide. An accurate voltage Vds can be measured through Kelvin sensing drain and source pins of the power MOSFET, which are connected to a current sense circuit.

Abstract translation: 一种方法可以在从引脚解复用（解调））电压时重用至少一个引脚。 该方法可用于在测试（DFT）相位的设计中设置精确的电流限制阈值，从而准确地设置限流器的修整代码。 该方法使用功率MOSFET在大漏极电流下具有几乎相同的导电电阻的性质。 因此，可以根据小于ATE能够提供的最大电流的小电流宿的准确的漏极 - 源极电压Vds来设置电流限制阈值。 可以通过连接到电流检测电路的功率MOSFET的开尔文感测漏极和源极引脚来测量精确的电压Vds。

公开(公告)号：US08928303B2

公开(公告)日：2015-01-06

申请号：US13827666

申请日：2013-03-14

Applicant: Analog Devices Technology

Inventor： Zhijie Zhu ,  Junxiao Chen ,  Bin Shao

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2003/1566

Abstract: Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor.

Abstract translation: 公开了用于产生开关信号的驱动信号的装置和方法。 第一电路接收振荡参考信号，第一补偿信号，第二补偿信号和第三补偿信号。 第一补偿信号表示功率转换器的输出电压与参考电压之间的误差。 第二补偿信号指示相对于阈值的误差。 第三补偿信号表示功率转换器的输出电流。 第一电路产生具有波形的比较信号，该波形包括至少部分地基于周期性参考信号，第一补偿信号，第二补偿信号和第三补偿信号的组合的具有持续时间的脉冲。 第二电路接收时钟信号和比较信号并产生用于驱动晶体管的激活和去激活的驱动信号。

公开(公告)号：US08887119B2

公开(公告)日：2014-11-11

申请号：US14028792

申请日：2013-09-17

Applicant: Analog Devices Technology

Inventor： Roger Feng ,  Junxiao Chen ,  Bin Shao

IPC: G06F17/50

CPC classification number: G06F17/5063 ,  G06F2217/78

Abstract: A method can reuse at least one pin in demultiplexing (demuxing) a voltage from a pin. The method can be used to set an accurate current limit threshold in a design for test (DFT) phase and, thus, to accurately set a trimming code of a current limiter. The method uses the property that a power MOSFET has almost a same conductive resistance at a large drain current. Thus, the current limit threshold can be set according to an accurate drain-to-source voltage Vds at a small current sink that is less than a maximum current that ATE is able to provide. An accurate voltage Vds can be measured through Kelvin sensing drain and source pins of the power MOSFET, which are connected to a current sense circuit.

Abstract translation: 一种方法可以在从引脚解复用（解调））电压时重用至少一个引脚。 该方法可用于在测试（DFT）相位的设计中设置精确的电流限制阈值，从而准确地设置限流器的修整代码。 该方法使用功率MOSFET在大漏极电流下具有几乎相同的导电电阻的性质。 因此，可以根据小于ATE能够提供的最大电流的小电流宿的准确的漏极 - 源极电压Vds来设置电流限制阈值。 可以通过连接到电流检测电路的功率MOSFET的开尔文感测漏极和源极引脚来测量精确的电压Vds。

公开(公告)号：US20140266122A1

公开(公告)日：2014-09-18

申请号：US13827666

申请日：2013-03-14

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Zhijie Zhu ,  Junxiao Chen ,  Bin Shao

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2003/1566

Abstract: Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor.

Abstract translation: 公开了用于产生开关信号的驱动信号的装置和方法。 第一电路接收振荡参考信号，第一补偿信号，第二补偿信号和第三补偿信号。 第一补偿信号表示功率转换器的输出电压与参考电压之间的误差。 第二补偿信号指示相对于阈值的误差。 第三补偿信号表示功率转换器的输出电流。 第一电路产生具有波形的比较信号，该波形包括至少部分地基于周期性参考信号，第一补偿信号，第二补偿信号和第三补偿信号的组合的具有持续时间的脉冲。 第二电路接收时钟信号和比较信号并产生用于驱动晶体管的激活和去激活的驱动信号。