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Control system and semiconductor device used therein

A control system and semiconductor technology, applied in semiconductor devices, control/regulation systems, program control in sequence/logic controllers, etc., can solve problems such as low current detection accuracy and achieve low-cost effects

Inactive Publication Date: 2011-04-06
HITACHI AUTOMOTIVE SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for current control, the methods described in Patent Documents 1 and 2 have a problem of low current detection accuracy regardless of whether the current detection accuracy corresponding to the control target accuracy is required.

Method used

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  • Control system and semiconductor device used therein
  • Control system and semiconductor device used therein
  • Control system and semiconductor device used therein

Examples

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Embodiment Construction

[0052] Next, use Figure 1 to Figure 9 , the structure and operation of the control system and the semiconductor element used therein according to the first embodiment of the present invention will be described.

[0053] Initially, use figure 1 The structure of the control system of this embodiment is demonstrated.

[0054] figure 1 It is a block diagram showing the configuration of the control system according to the first embodiment of the present invention.

[0055] As the control system of the present embodiment, an automatic transmission control system will be described as an example here.

[0056] Drive output from the engine is applied to an input shaft of an automatic transmission 74 and transmitted to a transmission 74 through a torque converter 72 . The drive output from the transmission 74 is transmitted to the wheels through the drive shaft through the working gears.

[0057] The automatic transmission control system of this embodiment supplies the oil supplie...

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PUM

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Abstract

The present invention aims to provide a control system which is capable of building high-precision current detecting means in a single-chip LSI and can be realized at a lower cost, and a semiconductor device used in the control system. Drive circuits 24-1 to 24-4 are provided inside the same semiconductor chip 1. The drive circuits 24-1 to 24-4 are equipped with: current detecting shunt resistors Rs1 to Rs4 each of which is provided in each of the drive circuits and detects a current flowing through a load, the current detecting shunt resistors being provided within a semiconductor chip 1 by the same process; a dummy resistor Rd provided within the semiconductor chip 1 by the same process as the current detecting shunt resistors; and a calibration reference Rref externally attached to the semiconductor chip 1 and connected to the dummy resistor Rd. A correcting means 10 corrects the values of currents that flow through the current detecting shunt resistors Rs1, Rs4, using the dummy resistor Rd and the calibration reference Rref.

Description

technical field [0001] The present invention relates to a control system for controlling the current flowing to a control object and a semiconductor element used therein, and in particular, to a control system suitable for having a detection resistor for detecting the current flowing to a control object and its use therein semiconductor components. Background technique [0002] Various control objects are electronically controlled, and electric actuators such as electric motors and solenoids are widely used in order to convert electrical signals into mechanical motion or hydraulic pressure. In order to control these electric actuators with high precision, high-precision current detection is necessary. Here, miniaturization and cost reduction of the control device are achieved by incorporating a current detection circuit in the IC chip. [0003] It is known that in order to incorporate a current detection circuit in an IC chip, a resistor for current detection is built in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04H01L27/02G01R19/00
CPCB60L2240/445B60W2510/0676B60W2540/10B60W2510/0638B60L2240/441B60L2240/486G05F1/46B60W2540/16
Inventor 金川信康广津铁平田边至宫冈修一大浦亮一
Owner HITACHI AUTOMOTIVE SYST LTD