Real Color ZLL LED Light Bulb with
Contents
1. 3 2 AC Source Connector The AC Source Connector J4 connects to AC line which is a high voltage Pay attention DO NOT touch them for your safety when running the kit Table 3 5 AC Source Connector J4 Pin on AC Source Connector Name on the AC Source Connector L LIVE WIRE N NEUTRAL WIRE AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE 6 Al t el 42241A LED 02 2014 3 3 JTAG UART Header The Atmel AVR ATmega256RFR2 can be programmed and debugged via JTAG header Any tools which carry the JTAG interface can program and debug the kit JTAGICE3 is recommended for programming The definition of the JTAG interface can be found in Table 3 6 Table 3 6 AVRATmega256RFR2 Programming and Debugging Interface JTAG Pin on programming header Pin on AVR ATmega256RFR2 JTAG E PF4 TCK E SE GND 3 PF6 TDO ER E vec ES EES TMS 6 RSTN _nSRST 8 9 LEET mm 10 z GND The definition of the UART interface can be found in Table 3 7 Table 3 7 AVRATmega256RFR2 Universal Asynchronous Receiver Transmitter Interface UART Pin on programming header Pin on AVR ATmega256RFR2 UART 1 S ES 2 E _GND 4 S VCC 5 E f ER o PEO RXD 8 PEt _TXD H um ies The JTAG and UART interface uses the different pins at the same hea2. of the Atmel ATmega256RFR2 radio controller board e Atmel Studio 6 Atmel Studio 6 is a free Atmel IDE for development of C C and assembler code for Atmel microcontrollers e Atmel JTAGICE3 JTAGICE3 is a mid range development tool for Atmel AVR 8 and 32 bit microcontrollers with on chip debugging for source level symbolic debugging Nano Trace if supported by the device and device programming AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide Atmel APPLICATION NOTE 3 42241A LED 02 2014 2 Overview The Atmel AVR Real Color ZLL LED Light Bulb kit is intended to demonstrate the Atmel AVR Atmega256RFR2 single chip microcontroller and radio transceiver which is used in the Bulb application via ZigBee Light Link protocol The kit includes three circuit boards Power Supply Board MCU Control Board and LED String Board Power Supply Board contains the AC to DC switching power supply and the DC to DC circuit It supplies power for the whole system The board provides 9 3V and up to 850mA MCU Control Board contains the MCU ATmega256RFR2 antenna and the LED driver controller LED String Board is configured as three parallel LED strings two Green LEDs two Red LEDs and one Blue LED Figure 2 1 shows the available features on the board Figure 2 1 Overview of Real Color ZLL LED Light Bulb Connect to the Green LEDs string AC to DC power Supply 9V HeaderG G Antenna ATmegaRFR2 R G G 3 3V Hea
3. temperature sensor 100kKQ NTC connected to the ADC channel of the MCU The power is supplied by 3 3VDC The ADC reference is internal 1 6V reference voltage to reduce the error caused by external power Table 4 3 Temperature Sensor Connection Pin on AVR ATmega256RFR2 Temperature Sensor PF 1 NTC AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide APPLICATION NOTE 12 Al t mMm el 42241A LED 02 2014 5 Code Examples The example application is based on the Atmel Software Framework that is included in Atmel Studio 6 The Atmel Software Framework can also be found as a separate package online at http www atmel com tools avrsoftwareframework aspx For more information about the code example see the application note AT06482 Real Color ZLL LED Light Bulb Reference Design with ATmega256RFR2 Software User s Guide AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE 13 Al t e L 42241A LED 02 2014 Revision History Doc Rev REI Comments 42241A 02 2014 Initial document revision AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE 14 Al t e L 42241A LED 02 2014 Atmel Enabling Unlimited Possibilities Atmel Corporation Atmel Asia Limited Atmel Munich GmbH Atmel Japan G K 1600 Technology Drive Unit 01 5 amp 16 19F Business Campus 16F Shin Osaki Kangyo Building Sa
4. AND PROFITS BUSINESS INTERRUPTION OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice Atmel does not make any commitment to update the information contained herein Unless specifically provided otherwise Atmel products are not suitable for and shall not be used in automotive applications Atmel products are not intended authorized or warranted for use as components in applications intended to support or sustain life
5. ATmega256RFR2 Hardware User Guide Atmel APPLICATION NOTE 10 42241A LED 02 2014 4 3 ZigBee Transceiver The Atmel AVR ATmega256RFR2 device integrated a high performance RF CMOS 2 4GHz radio transceiver In the design only four components ATmega256RFR2 Balun Capacitance and Antenna consist of RF function circuit Figure 4 3 RF Function Circuit Antenna C RFP Y RFN ATmega256RFR2 In order to obtain high performance about the RF the PCB layout is very important How to design the PCB about the RF circuit refer to the application note Atmel AVR10004 RCB256RFR2 Hardware User Manual 4 4 LED String Board Pay attention DO NOT look at the LEDs directly when they are lit Otherwise LEDs may potentially harm the user s eyes In order to get the perfect feeling of mixed color two Green LEDs two Red LEDs and one Blue LED are used in the design and the LEDs should be well positioned in PCB layout Figure 4 4 Placement of the LEDs AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE 11 Al t el 42241A LED 02 2014 4 5 4 6 LED Indicator There is a LED available on the board that can be used to indicate the working condition of the kit The green LED can be activated by driving the connected I O line to VCC Table 4 2 LED Connections Pin on AVR ATmega256RFR2 LED PE Green LED Temperature Sensor The design is equipped with one
6. De Atmel APPLICATION NOTE AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide Atmel AVR 8 bit Microcontroller Description The reference design of the Real Color ZLL LED Light Bulb is developed to demonstrate ZLL ZigBee Light Link protocol functions The reference hardware includes four parts AC to DC power supply Atmel single chip RF MCU LED drive circuit and LED String board The LED string is controlled by application software on Tablet or Smartphone via the ZigBee Light Link protocol commands through the Atmel ATmega256RFR2 The Real Color ZLL LED Light Bulb supports to color switch tunable brightness and so on For this reference design the hardware design files schematic BOM and PCB Gerber and software source code can be downloaded from the Atmel website The provided hardware documentation can be used with no limitations to manufacture the reference hardware solution for the design Features e Atmel AVR ATmega256RFR2 microcontroller with 2 4GHz radio transceiver e Drives three parallel high power LED strings Red Green Blue e Up to 420mA current for each LED string with individual PWM e 1kHz PWM input for Dimming Duty Cycle e 8W AC to DC power supply e Over Temperature Detection e E27 Standard Lamp interface e Programming Debugging interface JTAG UART Figure 1 Real Color ZLL LED Light Bulb 42241A LED 02 2014 Table of Contents e RENONS EE 3 e e 4 2 2
7. EREECHEN 5 2 1 Preprogramming Firmware E 9 SEENEN 5 23 Programming he Kil seisena a r reie RAe aieri 5 z COE O E 6 3 1 LED Strings KEEN ege eebe Eeer 6 32 AC ele CONNECCION ae ence ee ne eee ene eee ance eee oriei ainiin 6 3 3 JTAG UART e Ee EN 7 3 4 9VDC Power HEADS EE T 35 33VDC Power E EEN T A PEPA EEN 9 4 1 ACto DC Switching Power Supply ss nnsnsnnsnsnnnnsnnnnsrensnrnnsnrrnsnrrnsrrresrrresrrnee 9 Aa E RE 10 4 2 1 Diode SSS CUO EE 10 4 3 ZigBee Transceiver ccccccssecccsscecescccesececsecensueeseueceeseeecsueessueesnsesensesensaees 11 4 4 LED String Board DEE 11 Aa LED CA OM E 12 4 6 Temperature Sensor nnnennnennnnieninnnrinrrernrrrsrirsnrrsrrrrrrnnnrennrrenrennrennrnenrnenee 12 9 Code Examples ee 13 AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide Atmel APPLICATION NOTE 2 42241A LED 02 2014 1 Related Items The following list contains links to the most relevant documents for the ZLL Bulb with Atmel ATmega256RFR2 e Atmel MCU Wireless Atmega256RFR2 Atmega128RFR2 Atmega64RFR2 Summary Datasheet The document contains complete and detailed description of all modules included in the Atmel MCU wireless microcontroller family e Atmel MCU Wireless Atmega256RFR2 Atmega128RFR2 Atmega64RFR2 Datasheet ATmega256RFRz2 is the microcontroller used in this solution e RCB256RFR2 Hardware User Manual The document describes the usage design and layout
8. der 3 4 9VDC Power Header The connectors J6 and J8 provide a connection of the 9VDC from the Power Supply Board to the MCU Control Board The header is polarity sensitive Table 3 8 9VDC Power Header Pin on 9VDC power header Name on the 9VDC power header 1 9 2 GND 3 5 3 3VDC Power Header The connectors J7 and J9 provide a connection of the 3 3VDC from the Power Supply Board to the MCU Control Board The header is polarity sensitive AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE H Al t el 42241A LED 02 2014 Table 3 9 3 3VDC Power Header Pin on 3 3VDC power header Name on the 3 3VDC power header AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE 8 Al t e L 42241A LED 02 2014 4 Peripherals Figure 4 1 shows the Real Color ZLL LED Light Bulb system block diagram Figure 4 1 Real Color ZLL LED Light Bulb System Block Diagram L 85 264VAC AC DC 9VDC 50 60Hz Power Supply N S SCH 3 3VDC Kg RF Antenna MCU a i the RFR2 Warning The kit has high voltages on the board that pose a shock hazard to the user Appropriate care should be taken when operating the board In addition to the high power LEDs are used on the LED String board Do not look directly at the LEDs when the board is active and or protect your eyes with dark glasses since the LEDs are very bright To turn on
9. der AC_L AC_N LED string Board Connect to the Red LEDs string LED Driver JTAG UART Interface AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide Atmel APPLICATION NOTE 4 42241A LED 02 2014 2 2 2 1 2 2 2 3 Components for Setup The components listed in Table 2 1 are necessary to perform all functions of the reference design Table 2 1 Components for Kit Setup Component Function Lamp with E27 Reference hardware Kit ZLL Bulb assembled with Power Supply Board MCU Control _ Board and LED String Board 8 Lamp Holder with E27 _ Supply 110V 220VAC and 50 60Hz frequency Power to the kit _ Programming Tool with JTAG interface __Debug and Programming 8 _ZLL Ethernet Gateway Communicate between the kit and Wi Fi Router Wi Fi Router Communicate between the Tablet or Smartphone and _ ZLL Ethernet Gateway Tablet or Smartphone based on the Android Control the kit using application software System Application Software Running on the Tablet or Smartphone to control the Kit Preprogramming Firmware The Atmel ATmega256RFR2 on the kit is programmed with the default firmware The detailed description of the firmware is available in the AT06482 Real Color ZLL LED Light Bulb with ATmega256RFR2 Software User Guide Power Supply The kit is powered from an AC line in the voltage range 85VAC and 264VA with 50 60Hz frequency The AC to DC
10. etween 8V to 30V and provides an externally adjustable output current of up to 1 2A via set by the sample resistance Rs The device includes the power switch and accepts either a DC voltage or a PWM dimming In this reference design the PWM dimming method is used In order to avoid the flicker of the LED the PWM frequency set to 1kHz in the design Note It is better that the voltage difference between the input supply and the LED string more than 2V Figure 4 2 shows the typical application circuit of the PT4115 Figure 4 2 Typical Application Circuit of the PT4115 Dc SZ LED el L VIN CSN DIM PT4115 PWM Dimming GND Table 4 1 PWM Dimming of the LED Strings Pin on AVR ATmega256RFR2 Function PE Dimming Red String LED _PE4 Dimming Blue String LED _ PES Dimming Green String LED 4 2 1 Diode Selection For maximum efficiency and performance the rectifier D should be a fast low capacitance Schottky diode with low reverse leakage at the maximum operating voltage and temperature It is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher than the maximum output load current It is very important to consider the reverse leakage of the diode when operating above 85 C Excess leakage will increase the power dissipation in the device and if close to the load may create a thermal runaway condition AT06412 Real Color ZLL LED Light Bulb with
11. n Jose CA 95110 BEA Tower Millennium City 5 Parkring 4 1 6 4 Osaki USA 418 Kwun Tong Road D 85748 Garching b Munich Shinagawa ku Tokyo 141 0032 Tel 1 408 441 0311 Kwun Tong Kowloon GERMANY JAPAN Fax 1 408 487 2600 HONG KONG Tel 49 89 31970 0 Tel 81 3 6417 0300 www atmel com Tel 852 2245 6100 Fax 49 89 3194621 Fax 81 3 6417 0370 Fax 852 2722 1369 2014 Atmel Corporation All rights reserved Rev 42241A LED 02 2014 Atmel Atmel logo and combinations thereof Enabling Unlimited Possibilities AVR and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries Other terms and product names may be trademarks of others Disclaimer The information in this document is provided in connection with Atmel products No license express or implied by estoppel or otherwise to any intellectual property right is granted by this document or in connection with the sale of Atmel products EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT INDIRECT CONSEQUENTIAL PUNITIVE SPECIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS
12. switching power supply can deliver 9 3V and up to 850mA The 9 3V is converted to proper voltage and supply to LED string It is also regulated down to 3 3V by an onboard DC DC regulator which provides power to the entire main board Programming the Kit The kit can be programmed from an external programming tool through the JTAG interface AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide APPLICATION NOTE 5 Al t mMm el 42241A LED 02 2014 3 Connectors The Real Color ZLL LED Light Bulb kit has several connectors and headers dedicated for difference purposes They are shown in Table 3 1 Table 3 1 Connector and Functions Connector Function Green LED String connector Blue LED String connector Red LED String connector AC source connector _ JTAG UART interface for programming and debug 9VDC power header J7 J9 3 3VDC power header 3 1 LED Strings Connector The J1 J2 J3 are the LED Strings connector It provides a connection from the MCU Control Board to the LED String Board The header is polarity sensitive Table 3 2 Green LED String Connector J1 Pin on Green LED String Connector Name on the LED Connector J a 2 eg Table 3 3 Blue LED String Connector J2 Pin on Blue LED String Connector Name on the LED Connector Table 3 4 Red LED String Connector J3
13. the board simply plug the power cord into an 85V to 264V and 50 60Hz frequency power source The LEDs light at application of power 4 1 AC to DC Switching Power Supply The AC to DC switching power supply the iw1706 is used to PWM controller The power supply uses a primary side control technology to eliminate the opto isolated feedback and secondary regulation circuits required in traditional designs The AC to DC power supply works at the fixed frequency Discontinuous Conduction Mode DCM operation at higher output load and switches to variable frequency operation at light output load for obtaining maximum efficiency In other words it uses adaptive multi mode PWM PFM control to dynamically change the BJT switching frequency for efficiency and EMI The AC to DC power supply build in fault protection features include overvoltage protection OVP output short circuit protection SCP and over current protection OCP The AC to DC power supply provides 9 3V and up to 850mA for system and input voltage range is 85V to 264VAC with 50 60Hz frequency AT06412 Real Color ZLL LED Light Bulb with ATmega256RFR2 Hardware User Guide mM i APPLICATION NOTE Al t el 42241A LED 02 2014 4 2 LED Driver The PT4115 device is used as LED driver It is a continuous conduction mode inductive step down converter designed for driving single or multiple series connected LED from a voltage source The device operates from an input power supply b
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