DALI

• Reduced system complexity with high performance MCUs
• High efficiency power conversion
• Low power consumption from the MCU (for bus power devices)
• Cost optimized

System notes

Controller side:

• The LPC1100XL (up to 50 MHz - 45 DMIPS) offers enough performance to integrate DALI message coding/decoding and PWM generation in a single chip
• Industry-leading low active power consumption of 110 uA/MHz for bus-powered devices
• Storage of scene settings in non-volatile memory using EEPROM emulation in flash, or integrated EEPROM in LPC11E00 series
• Up to four 16-bit and 32-bit timers, generating up to 11 PWM signals to control and dim the ballast
• Reduced development complexity - software can be written in C
• Reduced bill of materials - significant cost savings through Cortex-M0 architecture, plus many built-in peripherals to interface with lighting drivers and network in LPC1100XL

Power stage:

• LED dimming using the PWM input of the NXP UBA3070 DC-to-DC LED driver with up to 98% efficiency
• SSL4101 provides mains isolation for both the RGB LED power stage and the DALI wires
• Low component count and high efficiency through integrated PFC and flyback control functionality
• GreenChip TEA1721 buck converter supplies LPC1100XL with high efficiency; no-load power consumption levels <10 mW

Implementation example (OM13026 board):

• Contains isolated physical layer for the DALI bus with a Cortex M0 LPC111x microcontroller for the DALI protocol handling, and many I/O functions to steer external lighting drivers for solid state or compact fluorescent lighting applications
• Schematics, gerbers and BOM also available to speed up development
• Up to four PWM signals available to independently drive different lighting units
• Frequency and resolution of the signals is software programmable
• ON_OFF signal can be used independently from the PWM signals to switch a lighting driver into an OFF or ON state
• I2C-bus pins can be used to externally connect other devices like EEPROM or a temperature sensor
• Analog A/D input is available via pin 8
• IO signal is left open for the end user
• UART, I2C and A/D converter functionality not included in the software release

Download installer: LPC11xx_LPC13xx_DALI_DevKit.zip

The installer contains:

• AN11174 - Describes how to create a DALI slave device with the OM13026 LPC111x DALI slave board
• AN11175 - Describes the use of the NXP LPC134x Cortex-M3 microcontroller to create a DALI master
• UM10553 - Explains how to get started with the LPC1343 DALI to USB master demo board and the LPC111x DALI slave demo board using a DALI control application from NXP Semiconductors for Windows
• Software package – DALI master and slave implementation for LPCXpresso toolchain and Windows .NET GUI
• Schematics, Gerber files and BOM List