Input voltage automatic adjustment control device capable of being turned off of digitized automobile combination meter
A technology for self-adjusting, instrument cluster applications in transportation and packaging, vehicle components, etc.
Active Publication Date: 2013-04-24
吉林省启明电子科技股份有限公司
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Problems solved by technology
The device is mainly to solve the problem of reliable shutdown of the ignition power supply when the ignition power supply is overvoltage caused by instantaneous interference and the impact of the voltage fluctuation of the ignition power supply in the ignition state on the instrument power supply system.
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[0022] Depend on figure 1 , figure 2 The automatic control device for shutting off the input voltage of the digital automobile combination instrument shown in the figure fully considers the requirements of the current power supply for the instrument. The battery power supply 1 that provides electric energy directly supplies power and the ignition power supply 2 that provides electric energy for the automobile ignition and the automobile combination instrument is powered by the loop controlled by the voltage automatic adjustment circuit 3. In order to overcome the impact of the power supply fluctuation after the ignition work on the combination instrument, In the loop directly powered by the ignition power supply 2, bias resistors R1, R3 and resistors R2, R4 connected to the triode Q1, triode Q2 and the bases of the triode Q1 and triode Q2 are added respectively, and the emitter of the triode Q1 is passed through the diode D1. It is connected with the ignition power supply 2...
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The invention provides an input voltage automatic adjustment control device capable of being turned off of a digitized automobile combination meter. Based on the prior art, the input voltage automatic adjustment control device capable of being turned off of the digitized automobile combination meter comprises a voltage automatic adjustment circuit, an input voltage detecting terminal and a pulse-width modulation (PWM) adjustment control terminal, wherein the voltage automatic adjustment circuit, the input voltage detecting terminal and the PWM adjustment control terminal are organically matched with a single chip. The PWM adjustment control terminal controls turn-off and switching frequency of an electric switch of the voltage automatic adjustment circuit. When overvoltage exists in an ignition power supply, duty ratio of the PWM is automatically adjusted to control the switching frequency by turning off the ignition power supply and according to change of output voltage of the voltage automatic adjustment circuit, and thereby automatic adjustment of voltage fluctuation of the ignition power supply is achieved, stable operation of the meter is provided with the stable reliable power supply and influences caused by the voltage fluctuation of the ignition power supply on subordinate power supply return circuit is eliminated. The input voltage automatic adjustment control device capable of being turned off of the digitized automobile combination meter has the advantages of being not only capable of effectively improving adaptability of the meter to the change of power supply voltage and changing range applying to voltage, but also novel and unique in design, simple and reasonable in structure and arrangement, stable and reliable in working performance, suitable for popularizing in industries and the like.
Description
technical field [0001] The invention relates to an automatic adjustment control device, in particular to an automatic adjustment control device which uses a single-chip microcomputer to cut off the input ignition voltage of a digital automobile combination meter and automatically stabilizes and adjusts the input voltage. Background technique [0002] With the development of science and technology and the automobile industry, on-board ECU has been widely used. However, due to changes in the on-board system, the output voltage of the generator is always in a fluctuating state after the car is ignited, and there may be a problem of high-voltage interference caused by interference from the electrical circuit. work, it is necessary to carry out the necessary processing of the power supply. [0003] In the past, the control of the ignition power supply of the automobile combination instrument mainly used the method of parallel connection with the TVS transient voltage suppression...
Claims
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IPC IPC(8): B60K35/00
Inventor 阮少范宋连彬陈晓春邱淑贤
Owner 吉林省启明电子科技股份有限公司