A motorcycle riding on a steering light fails to pose a danger to the motorcycle driver himself and other motor vehicle drivers on the road. The function of the turn signal light is to tell the other motor vehicle drivers on the road the direction of the motorcycle, giving them sufficient Time reacts to the direction of movement of the motorcycle. Therefore, in addition to providing the oscillation frequency, the turn signal flasher drive module must also provide a load connection disconnect prompt function. Each time one of the high-power bulbs is disconnected, the lamp flash frequency will be doubled to alert the driver that the turn signal has failed. For scooters with a displacement of less than 150cc, the most common lamp configuration is 2 10W bulbs per side + 1.7W bulbs; each 10W bulb is disconnected, the driving frequency is twice as high as in normal operation.
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There is no microcontroller for setting and controlling the flash frequency in this application because all functions are integrated into a chip with built-in power and logic stages, where the power stage supplies current to the load and the logic stage controls all modes of operation ( Normal flash frequency, if one of the main loads is disconnected, double the flash frequency).
In this configuration, the smart driver chip (IC) is connected between the battery positive terminal (VCC pin) and a turn signal to the left and right steering mechanical switch. When the series switch connects the OUT pin to the lamp, the drive begins to perform a 50% duty cycle switch operation. Powering the driver requires an external low-voltage capacitor to stabilize the internal regulator output voltage and set the drive oscillation frequency.
From the structural point of view, there is no need to connect directly to GND. This special topology provides designers with an accurate, robust and reliable solution that overcomes many design challenges. This article will explore how the innovative STMicroelectronics product VN5MB02 uses its patented technology to provide accurate load break detection, ensuring that drivers can quickly change lanes.
The normal operating voltage of the load disconnect indication function should be within the entire battery voltage range (9-16V), and the bulb voltage may vary (within +/-10.5%) taking into account the product aging effect distribution.
The low voltage inverter produced by FGI covers every automation application requirement in the industrial plant. This Low Voltage Converter is mainly used for controlling and adjusting the speed and torque of three-phase AC asynchronous motors. Using the latest technological advancements in AC motor speed control, the FGI high performance Low Voltage Drives meet the needs of smart machines by increasing system reliability, improving process control and minimizing total installed project costs.
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