LED Bulb
( 1 ) Accuracy PWM generation, and duty cycle control, and precision dead zone, in order to LED Bulb achieve the power level more efficient and high-performance control . Advanced PWM provides a very accurate color output and generates dimming level capabilities. For example, by 16 PWM outputs , the microcontroller can independently control up to 16 individual LED strings.
( 2 ) provide up to 4.6M samples / s sampling and conversion speed ADC. A / D module with PWM combination enables engineers to create a tight feedback loop system to changing working conditions and surroundings react quickly .
( 3 ) built-in fail-safe mechanism to deal with overcurrent and overvoltage conditions . PWM fault tripping zone allows the system to unexpected system conditions, bypassing the CPU and use a pre-set state alternative PWM signal , thereby preventing damage to the system .
(4) I2C, SPI, UART, USB and CAN peripheral has been production-ready firmware drivers , to meet the connectivity needs of most LED applications .
Texas Instruments C2000Piccolo platform is designed for LED lighting integrated microcontroller example ( Figure 4 ) .32 -bit microcontroller core provides TMS320C28x device in digital signal processing , an arithmetic operation with optimized for interrupt-driven real-time control architecture, and can respond to change events programmable flexibility. TI's integrated CLA ( control regulations tooth accelerator ) is an independent core, without increasing the cost or overhead MCU only the second premise , to achieve the dual-core operation. CLA can be run independently C28xDSP , which is designed to perform highly efficient parallel processing.