公开(公告)号：US20220319965A1

公开(公告)日：2022-10-06

申请号：US17633680

申请日：2020-08-06

申请人： ROHM CO., LTD.

发明人： Akira Aoki ,  Shinsuke Takagimoto ,  Masaaki Nakayama

IPC分类号： H01L23/495 ,  H01L23/36

摘要： A semiconductor device comprises: a package having a rectangular shape when viewed in plan and including a first side, a second side parallel to the first side, a third side orthogonal to the first side and the second side, and a fourth side parallel to the third side and orthogonal to the first side and the second side; a power supply terminal provided on the first side; a power ground terminal provided on the second side; a switch output terminal provided on the second side; an upper switch connected between the power supply terminal and the switch output terminal; and a lower switch 11L connected between the switch output terminal and the power ground terminal.

公开(公告)号：US09148915B2

公开(公告)日：2015-09-29

申请号：US14271625

申请日：2014-05-07

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Koji Miyamoto

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0809 ,  B60Q11/005 ,  H05B33/0845 ,  H05B33/089

摘要： An automobile LED driving device includes a current setting portion to set multiple reference currents independently from one another for multiple respective current setting resistors connected externally, a current controller to select one of the multiple reference currents based on a control signal provided from outside, and an output transistor to control an output current to an automobile LED connected externally based on the reference current selected by the current controller.

摘要翻译： 汽车LED驱动装置包括电流设定部分，用于相互独立地设置多个参考电流，用于在外部连接的多个相应的电流设置电阻器，电流控制器基于从外部提供的控制信号来选择多个参考电流中的一个， 输出晶体管，以基于由电流控制器选择的参考电流来控制到外部连接的汽车LED的输出电流。

公开(公告)号：US12096530B2

公开(公告)日：2024-09-17

申请号：US18038281

申请日：2021-12-20

申请人： Rohm Co., Ltd.

发明人： Daisuke Kanbara ,  Akira Aoki ,  Ryo Takagi

IPC分类号： H05B45/50 ,  H05B45/3725

CPC分类号： H05B45/50 ,  H05B45/3725

摘要： A power control device is configured to control a power circuit that generates an output voltage based on an input supply voltage relative to a ground, and includes a first terminal fed with a common voltage, a second terminal connectable to an application terminal for the ground, a P-type substrate fed with the common voltage, a MOS transistor connected between the first and second terminals and configured with an N-channel MOSFET, and an internal reference voltage generating circuit configured to generate, based on the input supply voltage, an internal reference voltage relative to the common voltage. When the input supply voltage is turned on, the MOS transistor is turned on and thereby the first and second terminals are short-circuited together.

公开(公告)号：US11764683B2

公开(公告)日：2023-09-19

申请号：US17903491

申请日：2022-09-06

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Ryo Takagi

IPC分类号： H02M3/158 ,  H05B45/305 ,  H05B45/38 ,  H05B45/375 ,  H02M1/00

CPC分类号： H02M3/1588 ,  H05B45/305 ,  H05B45/375 ,  H05B45/38 ,  H02M1/0006 ,  H02M1/0009

摘要： This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith: a charge-pump power supply unit (α) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).

公开(公告)号：US11502608B2

公开(公告)日：2022-11-15

申请号：US16963734

申请日：2019-01-23

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Ryo Takagi

IPC分类号： H02M3/158 ,  H05B45/305 ,  H05B45/38 ,  H05B45/375 ,  H02M1/00

摘要： This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (a) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).

公开(公告)号：US20220102969A1

公开(公告)日：2022-03-31

申请号：US17460771

申请日：2021-08-30

申请人： ROHM CO., LTD.

发明人： Akira Aoki

IPC分类号： H02H9/04 ,  H02H1/00 ,  G01R19/00

摘要： The present disclosure provides a current detection circuit having a high detection precision. The current detection circuit includes: a current output type differential amplifier; a first input resistor, configured to be connected between a first input end of the differential amplifier and a first current sense terminal; a second input resistor, configured to be connected between a second input end of the differential amplifier and a second current sense terminal; an output resistor, configured to be connected to an output end of the differential amplifier; a first feedback current path, configured to allow a first feedback current to flow between the first input end and the output end of the differential amplifier; and a second feedback current path, configured to allow a second feedback current to flow between the second current sense terminal and the output end of the differential amplifier.

公开(公告)号：US11172556B2

公开(公告)日：2021-11-09

申请号：US16886958

申请日：2020-05-29

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Ryo Takagi ,  Masaaki Nakayama

IPC分类号： H05B45/345 ,  H05B45/14 ,  H05B45/325 ,  H05B45/3725

摘要： A light emitting element drive device generates a single output current while switching a target current value for each of a plurality of light emitting elements, and supplies the single output current to the plurality of light emitting elements in a time division manner.

公开(公告)号：US20210100082A1

公开(公告)日：2021-04-01

申请号：US16963734

申请日：2019-01-23

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Ryo Takagi

IPC分类号： H05B45/375 ,  H02M3/158 ,  H05B45/305 ,  H05B45/38

摘要： This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (a) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).

公开(公告)号：US09351369B2

公开(公告)日：2016-05-24

申请号：US13970666

申请日：2013-08-20

申请人： Rohm Co., Ltd. ,  HONDA MOTOR CO., LTD.

发明人： Kouji Miyamoto ,  Masaaki Nakayama ,  Akira Aoki ,  Koji Okamoto ,  Masaharu Ando ,  Yosuke Tsuchiya

IPC分类号： H05B33/08

CPC分类号： H05B33/0887 ,  H05B33/0809

摘要： A leakage current detection circuit detects a switch current flowing in a switch which is targeted for leakage monitoring, and generates a detection signal to prohibit operation of a control target circuit which is targeted for control when the switch current does not reach a predetermined threshold value.

摘要翻译： 泄漏电流检测电路检测在用于泄漏监视的开关中流动的开关电流，并且产生检测信号，以禁止在开关电流未达到预定阈值时用于控制的控制目标电路的操作。

公开(公告)号：US20140239851A1

公开(公告)日：2014-08-28

申请号：US14271625

申请日：2014-05-07

申请人： Rohm Co., Ltd.

发明人： Akira Aoki ,  Koji Miyamoto

IPC分类号： H05B33/08

CPC分类号： H05B33/0809 ,  B60Q11/005 ,  H05B33/0845 ,  H05B33/089

摘要： An automobile LED driving device includes a current setting portion to set multiple reference currents independently from one another for multiple respective current setting resistors connected externally, a current controller to select one of the multiple reference currents based on a control signal provided from outside, and an output transistor to control an output current to an automobile LED connected externally based on the reference current selected by the current controller.

摘要翻译： 汽车LED驱动装置包括电流设定部分，用于相互独立地设置多个参考电流，用于在外部连接的多个相应的电流设置电阻器，电流控制器基于从外部提供的控制信号来选择多个参考电流中的一个， 输出晶体管，以基于由电流控制器选择的参考电流来控制到外部连接的汽车LED的输出电流。