Segmented starting method, system, medium and device for automobile LED boost chip

Abstract

The invention provides a segmented starting method, system, medium and device for an automobile LED boost chip. An automobile LED circuit comprises the boost chip, a switching tube connected with theboost chip, a boost output end connected with the switching tube and a buck chip. The method comprises the following steps of setting the boost chip to be in a first-phase working mold; setting the turn-off time value of the boost chip as a first value; starting the boost output of the boost chip in the first-phase working mold; receiving a voltage value boosted and outputted by the boost chip andmonitored by the buck chip in real time, and starting a second-phase working mold of the boost chip after judging that the voltage value reaches an expected voltage value; and setting the turn-off time value of the boost chip as a second value. According to the invention, through the segmented starting of the boost chip, the overshoot of voltage and current is suppressed, and the realization moldis simple.

Description

technical field [0001] The invention belongs to the field of automotive LED signal lamp control, and relates to a multi-stage starting method for a boost chip, in particular to a multi-stage starting method, system, medium and equipment for an automotive LED boost chip. Background technique [0002] At present, the boost chips of many companies are often used in the multi-output OneForAll scheme of raising first and then lowering, and these boost chips are widely used in LED current drive modules with low price and high conversion efficiency. However, if the boost chip adopts more than two-phase working modes, when starting at the same time, compared with the single-phase working mode, the Boost boost chip will have twice or even higher instantaneous current, which will cause the input voltage to be pulled down instantaneously. It causes the system to restart, and causes the BCM (Body Control Module, Body Control Module) to detect overcurrent and give an alarm. [0003] The...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a multi-stage start-up method, system, medium and equipment for automotive LED booster chips, which are used to solve the problem that the prior art cannot use low-cost and easy-to-operate methods. Reduce the problem of overshoot of current doubling caused by the multi-stage startup of the boost chip

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