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1. 发明授权

US09502955B2 Drive circuit and semiconductor device 有权
标题翻译：驱动电路和半导体器件
公开(公告)号：US09502955B2
公开(公告)日：2016-11-22
申请号：US14879500
申请日：2015-10-09
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi , Masashi Akahane
IPC分类号： H03K3/012 , H02M1/088 , H02M1/08 , H03K17/16 , H03K17/567 , H03K17/687
CPC分类号： H02M1/088 , H02M1/08 , H03K17/162 , H03K17/567 , H03K17/687 , H03K2217/0063
摘要： Malfunction can be reliably avoided even when a signal that drives a high side power device is not normally transmitted in a level shift circuit. In a drive circuit, a pulse generator circuit generates a set signal and reset signal that causes a high side power device to be turned on or off. The pulse generator circuit provides set and reset signals, via a level shift circuit, to a high side drive circuit. A high side potential (a high side reference potential or a high side power supply potential) is detected by a high side potential detector circuit. A high side potential determination circuit determines a change in potential that impedes the transmission of the set signal or reset signal in the level shift circuit, and causes the pulse generator circuit to regenerate the set signal or reset signal when the timing of the detection coincides with the timing at which the set signal or reset signal is generated.
摘要翻译：即使驱动高侧功率器件的信号在电平移位电路中不能正常传输，也能够可靠地避免故障。在驱动电路中，脉冲发生器电路产生使高边功率器件导通或断开的置位信号和复位信号。脉冲发生器电路通过电平移位电路将设置和复位信号提供给高侧驱动电路。通过高侧电位检测电路检测高侧电位（高侧基准电位或高侧电源电位）。高侧电位确定电路确定阻止电平移位电路中的设定信号或复位信号的发送的电位变化，并且当检测的定时与检测的定时一致时，使脉冲发生器电路再生设定的信号或复位信号产生设定信号或复位信号的定时。

2. 发明授权

US10742204B2 Semiconductor device and power module 有权
公开(公告)号：US10742204B2
公开(公告)日：2020-08-11
申请号：US16174252
申请日：2018-10-29
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H03K17/082 , H03K17/0812
摘要： A device including: a transistor having a collector-emitter junction connected in series or parallel to a current detection resistance for detecting current that flows through a current sensing terminal of a switching element; and an overshoot processing circuit connected between the current sensing terminal and a base of the transistor, which reduces overshoot of sense current flowing through the current detection resistance, the overshoot is caused by switching operation of the switching element, by controlling the transistor depending on current input from the current sensing terminal, is provided.

3. 发明授权

US09660635B2 Power device drive circuit 有权
公开(公告)号：US09660635B2
公开(公告)日：2017-05-23
申请号：US14841541
申请日：2015-08-31
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H03K17/08 , H03K17/0812 , H02M1/08 , H02M7/538
摘要： A power device drive circuit reduces the short-circuit resistance of a power device that switches an input voltage. The power device drive circuit includes an output amplifier that applies a control voltage to a control terminal of the power device so as to be turned on and off, and an internal power supply circuit that generates a drive voltage of the output amplifier in accordance with a change in the input voltage, thereby causing the control voltage to change. In particular, the internal power supply circuit reduces the drive voltage of the output amplifier when the input voltage rises, thereby reducing the short-circuit current of the power device.

4. 发明授权

US11022499B2 Temperature detection device and power conversion device 有权
公开(公告)号：US11022499B2
公开(公告)日：2021-06-01
申请号：US16370012
申请日：2019-03-29
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： G01K1/14 , G01K13/00 , G01K7/00 , G01K7/01 , G01K7/25
摘要： A temperature detection device which receives a temperature signal from a temperature sensor and outputs an electrical signal corresponding to the temperature signal. A temperature slope which is an amount of change in an output of the electric signal relative to an amount of change in the temperature signal is changed at a predetermined temperature threshold.

5. 发明授权

US09787204B2 Switching power supply device 有权
公开(公告)号：US09787204B2
公开(公告)日：2017-10-10
申请号：US15207488
申请日：2016-07-11
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H02M3/335 , H02M1/08 , H02M1/00
CPC分类号： H02M3/33553 , H02M1/08 , H02M3/33507 , H02M3/33546 , H02M3/33569 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A drive control circuit for a switching power supply device. The drive control circuit includes an output control circuit configured to generate an output control signal with a pulse width corresponding to an output voltage of the switching power supply device, a threshold setting circuit configured to determine a winding threshold voltage according to a direct current input voltage applied to the series resonant circuit formed of the leakage inductance of an isolation transformer and a capacitor of the switching power supply device, a winding detection circuit configured to compare a voltage generated in a tertiary winding of the isolation transformer with the winding threshold voltage and to accordingly output a winding detection signal, and a drive circuit configured to receive the winding detection signal and the output control signal, and to generate a pulse-width controlled drive signal for driving a first switching element of the switching power supply device.

6. 发明授权

US09647566B2 Switching power supply apparatus 有权
公开(公告)号：US09647566B2
公开(公告)日：2017-05-09
申请号：US14483591
申请日：2014-09-11
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H02M3/335 , H02M1/38 , H02M1/00 , H02M1/08
CPC分类号： H02M3/33523 , H02M1/08 , H02M1/38 , H02M3/33553 , H02M3/33569 , H02M2001/0058 , Y02B70/1491
摘要： A switching power supply apparatus includes: a dead time circuit that receives an output control signal and generates dead time signal to specify a time width when both first and second switching elements are turned OFF; an output signal generation circuit that generates first and second output signals which specify the ON time of the first and second switching elements respectively in accordance with the output control signal and the dead time signal; and a dead time adjustment circuit that adjusts the turn ON timings of the first and second switching elements by changing the time width of the dead time signal in accordance with the change of voltage of the DC input power or the change of the output voltage of the capacitor.

7. 发明授权

US09979272B2 Semiconductor device 有权
公开(公告)号：US09979272B2
公开(公告)日：2018-05-22
申请号：US15608582
申请日：2017-05-30
申请人： FUJI ELECTRIC CO., LTD.
发明人： Shinichi Tezuka , Hidetomo Ohashi
IPC分类号： H02M1/084 , H03K17/0812 , H01L29/78 , H03K17/687 , H01L29/08 , H01L29/772 , H02M7/48 , G11C11/4091 , H01L29/06
CPC分类号： H02M1/084 , G11C11/4091 , G11C2211/4013 , H01L29/0603 , H01L29/772 , H01L29/7802 , H02M1/32 , H02M7/48 , H02M7/5387 , H03K17/08122 , H03K17/0822 , H03K17/687 , H03K2217/0063 , H03K2217/0072
摘要： In a semiconductor device, a high-side potential determination circuit outputs an event signal when a high-side reference potential detected by a high-side potential detection circuit rises. If at that time an input logic signal for controlling a high side is at a low (L) level, a pulse generation circuit regenerates a reset signal for a high-side drive circuit. When the input logic signal for controlling the high side is at the L level and the event signal is inputted, an overcurrent detection determination circuit makes an overcurrent detection signal from an overcurrent detection circuit invalid. When the event signal is not inputted, the overcurrent detection determination circuit makes the overcurrent detection signal valid.

8. 发明授权

US09413255B2 Switching power supply device 有权
标题翻译：开关电源装置
公开(公告)号：US09413255B2
公开(公告)日：2016-08-09
申请号：US14583085
申请日：2014-12-24
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H02M3/335 , H02M1/00
CPC分类号： H02M3/33553 , H02M1/08 , H02M3/33507 , H02M3/33546 , H02M3/33569 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A drive control circuit for a switching power supply device. The drive control circuit includes an output control circuit configured to generate an output control signal with a pulse width corresponding to an output voltage of the switching power supply device, a threshold setting circuit configured to determine a winding threshold voltage according to a direct current input voltage applied to the series resonant circuit formed of the leakage inductance of an isolation transformer and a capacitor of the switching power supply device, a winding detection circuit configured to compare a voltage generated in a tertiary winding of the isolation transformer with the winding threshold voltage and to accordingly output a winding detection signal, and a drive circuit configured to receive the winding detection signal and the output control signal, and to generate a pulse-width controlled drive signal for driving a first switching element of the switching power supply device.
摘要翻译：一种用于开关电源装置的驱动控制电路。驱动控制电路包括：输出控制电路，被配置为产生具有与开关电源装置的输出电压相对应的脉冲宽度的输出控制信号;阈值设定电路，被配置为根据直流输入电压确定绕组阈值电压施加到由隔离变压器的漏电感和开关电源装置的电容器构成的串联谐振电路，绕组检测电路，被配置为将隔离变压器的三次绕组中产生的电压与绕组阈值电压进行比较，从而输出绕组检测信号，以及驱动电路，被配置为接收绕组检测信号和输出控制信号，并产生用于驱动开关电源装置的第一开关元件的脉冲宽度控制的驱动信号。

9. 发明授权

US09385602B2 Switching power supply device 有权
标题翻译：开关电源装置
公开(公告)号：US09385602B2
公开(公告)日：2016-07-05
申请号：US14484885
申请日：2014-09-12
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H02M3/158 , H02M3/335 , H02M1/38 , H02M1/00 , H02M1/08
CPC分类号： H02M3/158 , H02M1/08 , H02M1/38 , H02M3/33523 , H02M3/33553 , H02M3/33569 , H02M2001/0022 , H02M2001/0025
摘要： A switching power supply device wherein an input voltage is stepped-up by first and second switching elements that are driven on and off in a complementary way, thus obtaining a stabilized output voltage. The switching power supply device includes a comparator that detects fluctuation in an operating reference potential of the second switching element accompanying fluctuation in the input voltage, and a drive signal generator circuit that carries out a logical operation on an output control signal, a dead time signal, and the output signal of the comparator, thus generating first and second drive signals that determine the on-state time of the first and second switching elements.
摘要翻译：一种开关电源装置，其中输入电压由互补驱动的第一和第二开关元件升压，从而获得稳定的输出电压。开关电源装置包括：比较器，其检测伴随着输入电压的波动的第二开关元件的工作基准电位的波动;驱动信号发生电路，对输出控制信号进行逻辑运算，死区时间信号和比较器的输出信号，从而产生确定第一和第二开关元件的导通状态时间的第一和第二驱动信号。

10. 发明授权

US10911030B2 Drive circuit for power element 有权
公开(公告)号：US10911030B2
公开(公告)日：2021-02-02
申请号：US16119290
申请日：2018-08-31
申请人： FUJI ELECTRIC CO., LTD.
发明人： Hidetomo Ohashi
IPC分类号： H03K3/012 , H03K17/0412 , H03K17/082
摘要： There is provided a drive circuit for turning on/off a power element which controls a main current flow between a first main electrode and a second main electrode in response to a drive signal applied to a control electrode. The drive circuit includes first and second semiconductor switch elements which are connected in series and interposed between a power supply terminal and a ground terminal, a series connection point thereof being connected to the control electrode, third and fourth semiconductor switch elements which are connected in series and interposed between the power supply terminal and the ground terminal, a series connection point thereof being connected to the second main electrode, and a control circuit which controls turn-on/off of the power element by turning on/off the first to fourth semiconductor switch elements. The first semiconductor switch element has a larger on-resistance than the second to fourth semiconductor switch elements.

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