The working principle of the electric vehicle lamp chip can be briefly summarized as follows:
Light source: Electric vehicle lights usually use LED (Light Emitting Diode) as the light source. An LED is a semiconductor device that emits light when an electric current is passed through an LED.
Driver circuit: The lamp chip contains a driver circuit that controls the brightness and light pattern of the LED. The drive circuit is mainly composed of a power manager, a current regulator, and control logic.
Control logic: The control logic in the light chip is responsible for receiving and processing signals from the vehicle, such as switching light modes, adjusting brightness, etc. The control logic can also automatically adjust the brightness and mode of the lights based on factors such as ambient light intensity or vehicle speed to provide better driving visibility and safety.
Dimming technology: Lamp chips can also use dimming techniques, such as pulse-width modulation (PWM) or current regulation, to control the brightness of LEDs. These technologies can adjust the magnitude of the current or change the frequency of the current according to the demand, so as to achieve the effect of different brightness of the headlights.
Huihai H5028L, support high and low bright, high and low beam, simple periphery, cost-effective, support 12V, 24V, 48V, 60V, 80V and other different electric vehicle voltages.
Product Description: The H5028L is a non-isolated constant current LED driver IC with simple peripheral circuits. The typical switching frequency of the H5028L is fixed at 130kHz, which allows for the use of smaller inductors in the application, which can effectively save space in the whole machine. The H5028L can switch between two functions by controlling the MODE port, MODE is high brightness mode, and MODE is low light mode with 50% load current when MODE is connected to high level.
The H5028L is available in an ESOP-8 package with a heatsink on the lower part of the chip.
Connected to the drain pin, the chip can effectively dissipate heat.
Product Features: l Wide voltage 8V-90V input range.
l Typical 130kHz switching frequency.
l High efficiency: up to 95%.
l The output current can be as high as 15a (the allowance should be left on the glass fiber board).
l Built-in intelligent temperature protection, high temperature current drop.
l Built-in 100V low internal resistance MOS
l Average current working mode.
l Integrated output short-circuit protection function.
Typical Applications. l DC or AC input LED driver.
l RGB backlight LED driver.
l Electric bicycle lighting.
l High power LED lighting.
l Automobile lighting, etc.