Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Other

Autonetworks Technologies, Limited

Sumitomo Rubber Industries Limited

Isao Isshiki

Takahiro Onizuka

Takao Nozaki

Shigeki Yamane

Masayuki Kato

Seiji Takahashi

Masahide Hio

Masahiko Furuichi

Hitoshi Hashiba

Koji Sato

Seiji Ueda

Yoshiharu Nakai

Akihiro Ohoka

Shuji Mayama

Kenichi Yoshida

Mikao Nakajima

Fukuma Sakamoto

Masatoshi Tanaka

Shinichiro Takahashi

Itaru Wada

Takehito Kobayashi

Koichi Tsuno

Fumiyoshi Tanigawa

Tou Chin

Ryuji Nakanishi

Katsuyoshi Sunago

Tsuneo Nakahara

Fumiaki Mizuno

Kouichi Takagi

Koji Satoh

Bunji Hagihara

Tamotsu Fukai

Kikuo Nomura

Toshihiro Toda

Kazushige Nakamura

Yasushi Okawa

Masayuki Akatsuka

A gate driverperforms a normal charging operation for a power MOSFETby driving a charge pumpsolely, when a low-level control signal S(ON signal) is received during a normal state. On the other hand, if a low-level control signal S(ON signal) is received during a load anomaly state, an urgent charge FET, as well as the charge pump, is turned on when a load current IL exceeds a second anomaly threshold current ILfc, so that a rapid charging operation is performed.

Power supply controller

A voltage-dividing circuit, which is formed of serially connected voltage-dividing resistors R, R, R, is disposed between the source terminal S of a power MOSFETand the ground. The divided voltage Va at a connecting point A is applied to one of the input terminals of a comparator, while the divided voltage Vb at a connecting point B is applied to one of the input terminals of a comparator. The other input terminals of the comparatorsare connected to the connecting line between an external terminal P, to which an external resistoris connected, and an FET

Power supply controller and semiconductor device

In a power supply controllerhaving a self-protective mechanism for performing, intermittently or periodically, a forced ON-OFF operation which causes a power MOSFETto perform an automatically restorable primary disconnecting operation and a restoring operation when an overcurrent anomaly or an short-circuiting anomaly is detected, an automatically unrestorable secondary disconnecting operation is performed when the accumulated amount of the duration of the forced ON-OFF operation reaches an accumulation threshold.

After an output signal Sis level-inverted, first and second shorting FETsas a level-inversion inhibiting circuit inhibit level-inversion so that the signal is maintained to the inverted state. Thereafter the inhibition of level-inversion is released, when the signal is subsequently level-inverted at a proper time according to a desired duty ratio of a PWM signal S. Thus chattering can be prevented and thereby a PWM signal Sof a stable duty ratio can be generated, even if the level of a reference signal Sfluctuates due to a noise or the like during vehicle acceleration, for example.

PWM signal generator

A parallel circuitof a frequency control circuitis provided as an external circuit. Thereby, the charging time tdepends on the characteristics of the circuit elements, which are provided in the package of a semiconductor deviceand therefore subject to manufacturing variations of the semiconductor device. The discharging time tdepends on the parallel circuit, which is provided external to the semiconductor deviceand therefore can be selected to have appropriate characteristics after the semiconductor devicehas been manufactured. The circuit constants of circuits are set so that the discharging time tthat depends on the device characteristics of the external parallel circuitis longer than the charging time tthat depends on the device characteristics of the internal circuits of the semiconductor device

A circuit-constituting unit forming a distribution circuit or the like in a vehicle. The circuit-constituting unit includes a plurality of bus bars for constituting a power circuit; a semiconductor switching device provided in the power circuit; and a control circuit board. The bus bars are bonded to a surface of the control circuit board such that the bus bars are arranged to be generally coplanar with each other. The semiconductor switching device is mounted on both of the corresponding bus bars and the control circuit board. An opening may be formed through the control circuit board. In this case, one of terminals of the semiconductor switching device may be connected to a surface of the control circuit board facing away from the surface to which the bus bars are bonded. The other terminals may be connected respectively to the bus bar through the opening.

Circuit-constituting unit and method of producing the same

According to the charge pump circuit, a constant current charging and discharging circuit using follower circuits is interposed at current paths in charging and discharging a capacitor for stepping up. Transistors of the follower circuits are alternately made ON in accordance with a clock signal inputted from a signal input portion for switching to connect the capacitor for stepping up and restricting a current in cooperation with resistors or the like.

Charge pump circuit

A load drive circuit includes a plurality of control sections for drive controlling of a drive switching element while protecting the drive switching element from a predetermined abnormality status, and a current blocking switching element being provided in at least any of a path between the control sections and a power source and a path between the control sections and a ground. When an input to an input circuit is OFF, a current flowing to a gate drive circuit for on/off driving of the drive switching element becomes an OFF state, the driving switching element becomes an OFF state, and the input circuit causes each current blocking switching element to be an OFF state to block dark current.

Load drive circuit

A protection circuit, to be provided for a circuit arrangement having an inductive load and an FET as an N-channel MOS transistor provided upstream of the load with respect to a flow of power current, the FET controlling an energization state of the load, the protection circuit includes a first connection changer interposed on a connection line between a gate of the FET and a gate drive voltage supply source, the first connection changer changing a connection state between a first connection state in which the gate is connected to the gate drive voltage supply and a second connection state in which the gate is connected to a ground.

Protection circuit

Electromagnetic coil parts and wiring for connection to the electromagnetic coil parts are installed inside injector electric block body in which injector main body housing holes are made in accordance with injector mounting holes Eh of the engine body E side, and injector main bodies having valve parts are inserted into the injector main body housing holes whereby the valve parts are driven to open and close by means of exciting and non-exciting operation of the electromagnetic coil parts Further, an ignition coil device module is provided with ignition coil devices provided corresponding to a plurality of combustion chambers of an engine, respectively, wherein connection surface base portions at which connecting terminals are exposed are provided on one-side surface of each ignition coil device

Injector module, injector electric block body, injector main bodies to be used for the same, and ignition coil device module

In the power distributor using a semiconductor switching element, input terminals I and L, output terminals A- J, connected to the element, and more preferably, the board terminals and , are structured by a metallic plate, and arranged on the same plane perpendicular to the plate thickness. The metallic plate can be integrated by the resin mold, thereby the structure can be greatly simplified. The metallic plate can be produced by a greatly simple method by which, after the punching out of the metallic plate and the molding of the resin mold, a predetermined portion of the metallic plate is cut and the semiconductor switching element is mounted, and it can contribute to also the reduction of the cost.

Power distributor for a vehicle and production method thereof

In a current detecting circuit, a virtual earth generating circuit generates a low voltage V lower by a predetermined potential difference than a battery voltage V outputted from anon-vehicle battery . A CPU operates while the low voltage V is used as an earth potential and the voltage V higher by the predetermined voltage value than the low voltage V is used as a power-supply voltage. A/D conversion input terminals and of the CPU are connected to the battery side of a current detecting resistor and the load side of the resistor . The voltages on the battery side and the load side of the resistor to be inputted to the terminals and are detected by an A/D converter . A load current I is calculated based on the detected results and the resistor resistance.

Current detecting circuit

Instead of a relay block which is present in bus bar circuits in a conventional electric junction box, semiconductor switching devices are provided, and a power distributing unit PD which is independent of a bus bar circuit unit JB is structured by concentrating these semiconductor switching devices output terminals of this power distributing unit PD being connected to appropriate bus bars of the bus bar circuit unit JB. The power distributing unit PD and the bus bar circuit unit JB are incorporated in a common housing

Electric junction box for vehicle

Vehicle power distributor and method of producing the same

In a power distributor for a vehicle, each of semiconductor switching elements is disposed between an input terminal and corresponding one of a plurality of output terminals The semiconductor switching elements are disposed in one direction and a control circuit board is provided thereon. The input terminal the output terminals and board terminals coupled to the control circuit board are disposed in parallel to the arrangement direction of the semiconductor switching elements and protruded from the casing in the same direction to thereby directly form a connector.

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Nagoya, Japan

Isao Isshiki