The Mobile Application is used to connect to the demo board through Bluetooth protocol. The load used for semo purposes is 30 V / 275 mA. Every string has a different white color temperature (warm/cool). The LED load used on this demo contains 20 LEDs two interlaced strings of 10 LEDs in parallel. It also retains the last set of values in flash memory which are used as default values on power up. The Microcontroller PIC16F15313 receives the data from Bluetooth module and controls the color temperature and intensity of the LED load according to the values set by user in the Mobile Application.
#Digital pipe fitter activation serial
RN4871 Transparent UART seamlessly transfers serial data from its UART over a Bluetooth Low Energy connection and vice versa, providing an end-to-end data pipe between microcontroller and smartphone. This service simplifies serial data transfers over Bluetooth Low Energy (BTLE) devices. The RN4871 introduces a private GATT service named as “Transparent UART”. Bluetooth Low Energy (BLE) is a technology optimized for ultra-low power consumption instead of increasing the data rates available, making it the least power consuming wireless technology. The demo uses RN4871 Bluetooth Low Energy (BLE) module which integrates Bluetooth 4.2 baseband controller, on-board Bluetooth stack, digital and analog I/O and RF power amplifier into one solution. This control IC does not produce a peak-to-average error, and therefore greatly improves accuracy, line and load regulation of the LED current without any need for loop compensation or high-side current sensing.
#Digital pipe fitter activation driver
The demo uses the HV9961 buck LED Driver which is an average current mode control LED driver IC operating in a constant off-time mode. It provides a PFC of at least 0.9 at 120Vac and 0.85 at 230Vac. The demo offers an implementation of passive Power Factor Correction (PFC). This demo can be supplied from a wide input range 50Vac to 265Vac. This is followed by a 3.3V Low-Dropout (LDO) Regulator MCP1703. The microcontroller and the BLE module is supplied offline, directly from the grid at 120/230Vac, by means of a bridge rectifier and a depletion Field-Effect Transistor DN2470.
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