Research on the Technology of Driving Low Voltage Drop Power Based on Headlights
With the development of driving safety and headlight design concepts,LED lights have gradually become the mainstream configuration of automotive signal lights.This article mainly studies a Sepic constant current output circuit with a relatively wide input operating voltage(voltage 9 V-16 V)designed based on the DC-DC controller TLD5099.At the same time,the peripheral circuit is used to change the reference voltage of TLD5099 to adjust the output current of the lamp,and thus to reduce the current and the power in the 6 V-9 V voltage range.The problem of high load and high loss caused by high current to the wiring harness,connectors,and switching power supply devices of the boost and buck system lamps at low voltages of 6 V-9 V has been solved.At the same time,combined with the system temperature control strategy,the current and power are reduced at high temperatures,ensuring the reliability of the system.This paper presents the hardware design principles and analysis of each module of the driving circuit.
constant current drivehigh temperature current reductionlow voltage current reduction
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