Quick starting circuit for flasher and control method

Abstract

The invention provides a quick starting circuit for a flasher and a control method. When a key is in a default switched-off state, a battery is unable to supply power for the circuit, and a bulb is inan off state. When the key is switched on, the battery supplies power to the circuit; in the first half period, a logic module LOG controls an NMOS transistor Q1 to be switched off, the bulb is turned off, and the battery charges a capacitor C1; and in the second half period, the logic module LOG controls the NMOS transistor Q1 to be switched on, and the bulb is turned on. A diode D1 supplies power to the logic module LOG module, and continuous control over the NMOS transistor by the LOG module is kept. According to the quick starting circuit of the invention, under the condition that the equivalent resistance of a chip does not need to be strictly designed, the bulb is rapidly turned on in the first period of electrification, and at the same time, the chip is effectively protected, and the chip is prevented from being damaged at the initial stage of work; and a classic circuit is continuously used, namely, the peripherals of the existing circuit do not need to be redesigned, and justcontrol logic needs to be optimized, and therefore, so that the research and development cost of a project is reduced.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a method for starting a flasher. Background technique [0002] With the rapid development of my country's road construction and the improvement of residents' living standards, motor vehicles have gradually become a necessity in people's lives, and with the rapid increase in the number of motor vehicles, road safety has also become a hot social topic. In the safety guarantee system of motor vehicles, the flashing light system is undoubtedly an important part. The flashing lights including turn signal and double flashing can send corresponding warning information to other vehicles, so it is very important to ensure that the flashing device of the vehicle can be turned on at any time. necessary. [0003] The circuit system of the flasher is relatively simple, and the overall circuit can be simplified into the following four parts: battery, IC, capacitor and light bulb, among which the ve...

AI Technical Summary

Problems solved by technology

[0006] This design can ensure that the chip is turned on quickly in the first cycle of power-on, but due to the high requirements for chip design and manufacturing, the chip needs a larger design area and better packaging, which increases the manufacturing cost of the chip. In today's increasingly fierce chip competition, such a design method may not be worth the candle

At the same time, due to the process deviation in the chip design, in order to ensure the yield rate of the chip, it is necessary to leave sufficient design margin, which further increases the design and manufacturing cost

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