DEMO MANUAL DC2218A LT3965EFE 8-Switch Matrix LED Dimmer DESCRIPTION Demonstration circuit DC2218A is a matrix LED dimmer system featuring the LT3965 8-switch matrix LED dimmer IC. There are 16 500mA LEDs that can be individually turned on, off, or PWM dimmed with two 8-switch LED dimmer LT3965 ICs. The two strings of LEDs are driven with two buck LED driver outputs of the LT3797 triple LED controller IC. The third channel of the LT3797 serves as a 30V pre-boost voltage regulator to provide a proper input voltage to the two buck LED driver channels. DC2218A can be driven from a 9V to 30V input and can survive transients up to 36V. A pre-programmed DC2026C Linduino™ One demo circuit is attached to the DC2218A matrix LED dimmer shield to create a full matrix LED dimmer system. With the Linduino One attached as an under-shield microcontroller board, the entire system can be powered from either a 9V to 36V lab power supply or battery connected to the EMIVIN banana jacks or from a 12V 4A+ AC/DC converter connected to the J7 barrel jack connector. PERFORMANCE SUMMARY PARAMETER DC2218A can be operated by connecting 12V power to the input and selecting 7 pre-programmed patterns with rotary switch S1. When connected to a PC through a USB cable, an eighth setting of S1 (position 7) allows DC2218A to be operated with a graphical user interface (GUI). The LT3965 data sheet gives a complete description of the part, operation and applications information. The data sheet must be read in conjunction with this demo manual for demonstration circuit DC2218A. The LT3965EFE is assembled in a 28-lead plastic TSSOP (FE) package with a thermally enhanced ground pad. Proper board layout is essential for maximum thermal performance. See the data sheet section Layout Considerations. Design files for this circuit board are available at http://www.linear.com/demo/DC2218A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Linduino and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C CONDITIONS Input Voltage (EMIVIN or J7 Barrel Connector) MIN TYP 8 MAX 36 UNITS V RTCLK Switching Frequency Set by LTC6900 350 kHz PWM Dimming Frequency Switching Frequency Divided by 2048 170 Hz ILED 16 LEDs, 8 LEDs Each LT3965 500 mA 30VOUT LT3797 CH3 Pre-Boost Voltage 30 V I2C Serial Communications Frequency 400 kHz 2.1 mm ID Barrel Jack Connector Size (for 12V 4A+ Supply) PJ-002AH Power Jack Connector J7 dc2218af 1 DEMO MANUAL DC2218A QUICK START PROCEDURE How to Operate Pre-Programmed Patterns 0-6 (S1) 6. Change the Pattern Select rotary switch to positions 0-6 to observe different patterns. Demonstration circuit DC2218A is easy to set up to evaluate the performance of the LT3965 matrix LED dimming system and its pre-programmed patterns. 7. Press the Reset button S2 to start over again. NOTE: The included DC2026C Linduino One is preprogrammed to work with DC2218A. If the .ino code is mistakenly changed or overwritten, new .ino code must be uploaded from Linear’s website. Demonstration circuit DC2218A can be connected with a PC via USB cable and controlled with a GUI. NOTE: An acrylic shield has been assembled over the LEDs to protect the user’s eyes from extremely bright light. Please make sure that the shield is in place and any necessary protective eyewear is worn before looking directly at the bright LEDs and their patterns. Follow the procedure below: 1. Set the PATTERN SELECT rotary switch S1 to any position between 0 and 6. Position 7 is reserved for use with the GUI (graphical user interface). 2. Connect 12V power to either the EMIVIN and GND banana jacks or to the J7 2.1mm (inside diameter) barrel jack. 3. Observe the red LED indicator light (D32). When it begins flashing, then the board is ready to start up. How to Operate with Graphical User Interface (GUI) NOTE: The included DC2026C Linduino One is preprogrammed to work with DC2218A and to interface with the LT3965 GUI. If the .ino code is mistakenly changed or overwritten, new .ino code must be uploaded from Linear’s website. NOTE: An acrylic shield has been assembled over the LEDs to protect the user’s eyes from extremely bright light. Please make sure that the shield is in place and any necessary protective eyewear is worn before looking directly at the bright LEDs and their patterns. Follow the procedure below: 1. If never done before, download and install QuikEval™ from Linear’s website under design tools and software at http://www.linear.com/designtools/software/#Data QuikEval is your link to receiving the latest LT3965 GUI software and to run the GUI. Installation of QuikEval properly initializes the serial port driver on the computer to work with the Linduino One USB connection. If QuikEval is already installed, skip step 1, or update QuikEval to get the LT3965 GUI. 4. When the red LED (D32) is flashing, push the Push to Start button S3. 5. Observe the LED patterns and adjust the speed, brightness and pattern of the LEDs with the manual blue potentiometer R14. dc2218af 2 DEMO MANUAL DC2218A QUICK START PROCEDURE 2. Remove power and the USB cable from the DC2218A inputs. 8. Observe the GUI program starts at ALL CHANNEL MODE screen and the LEDs on the PCB are all off. 3. Turn the PATTERN SELECT rotary switch S1 to position 7 for the GUI. 9. Start creating and testing I2C commands with ALL CHANNEL MODE, SINGLE CHANNEL MODE, BROADCAST, DIGITAL WRITE, READ REGISTERS, and LED SETTINGS pages. 4. Connect 12V power to either the EMIVIN and GND banana jacks or to the J7 2.1mm (inside diameter) barrel jack. 5. Connect a USB cable between a PC and the USB connector on the under-shield DC2026C (which arrives included in the DC2218A package and pre-programmed with DC2218A .ino code). NOTE: An LT3965 GUI user guide is posted on the Linear blog site. It contains the GUI commands and details. Please contact Linear support for help with the GUI and User Guide. 6. Launch the LT3965 GUI from QuikEval. 7. Click Connect to DC2218A to connect to the DC2218A with the GUI. dc2218af 3 DEMO MANUAL DC2218A QUICK START PROCEDURE Figure 1. DC2218A Test Setup Photo dc2218af 4 DEMO MANUAL DC2218A QUICK START PROCEDURE VIN 12V DC + – OKAY TO NOT CONNECT THESE TURRETS OR 2.1mm INSIDE DIAMETER BARREL JACK J7 BANANA JACKS DC2026C LINDUINO ONE PRE-PROGRAMMED AND INSTALLED UNDER DC2218A USB CABLE CONNECTION UNDER PCB FOR GUI R14 POTENTIOMETER MANUAL INTERACTION WITH S1 PATTERNS 0-6 S3 PUSH TO START WHEN RED LED D32 IS FLASHING S2 RESET BUTTON TO RESET MICRO S1 PATTERN SELECT ROTARY SWITCH Figure 2. DC2218A Top Silkscreen and Component Reference Drawing dc2218af 5 DEMO MANUAL DC2218A PRE-PROGRAMMED PATTERNS STARTS WITH ALL LEDS OFF AND USES PUSH BUTTON START CONNECT POWER LT3797 STARTUP (PWM LOW) CHARGE PUMP LT3965 ON LINDUINO STARTUP PULL PWM OFF PRESS RESET SCM WRITES TO ALL CHANNELS – TURN LEDS OFF, 1 LED OPEN AND SHORT WAIT FOR START PUSH BUTTON Blinking indicates ready to start. PWM ON, CONNECT LED STRING LEDs are OFF, LT3965 SWITCHES are ON. High Beam Blank MAIN LOOP INTERACTIVE KNOB WAIT FOR ALERT FLAG Side-to-Side Steer 2 1 Wave Comet Side Bend Steer 4 3 CHECK ROTARY SWITCH POSITION 0 7 5 PWM All 16 6 Fade Wave GUI PROGRAMMED IN EMBEDDED C++ AND PRE-LOADED ON DC2026C (LINDUINO ONE) Figure 3. DC2218A Attached Linduino One Pre-Programmed Software Flow-Chart S1 Pattern Select Position 0. Comet: A comet of light runs around the sixteen LEDs changing PWM dimming brightness quickly increasing and decreasing at rates that look like a ball of fire zipping around the LEDs. The interactive potentiometer controls the speed of the comet. 1. Wave: A wave of light from right to left and from left to right changing PWM dimming brightness quickly increasing and decreasing at rates that look like a wave running from one side of the LEDs to the other. The interactive potentiometer controls the speed of the wave. 2. Side-to-Side Steer: Center headlight LEDs stay on to face directly forward while the right and left side LEDs turn on with brightness proportional to the amount that the steering wheel (interactive potentiometer) is turned. 3. High Beam Blank: While the low beam Is on 100% brightness, the sections of the high beam turn OFF. Although the blank spots would be controlled by a sophisticated camera detecting an object in front of a car to determine which high beam LEDs to turn off or dim, the section on DC2218A is controlled by turning the interactive potentiometer. 4. Side Bend Steer: All sixteen LEDs adjust PWM dimming duty cycle and brightness based upon the position of the steering wheel (interactive potentiometer). This pattern represents a light that bends around the side of a car, projecting a turning headlight pattern that is linked to the steering wheel. 5. PWM All 16: All sixteen LEDs have the same PWM dimming and brightness level that is set by the interactive potentiometer. They range from OFF to ON In increments of 1/256 PWM dimming. 6. Fade Wave: Using the PWM dim WITH FADE commands, a wave of light is created by fading the LED brightnesses up and down. WITH FADE option uses the logarithmic fade function of the LT3965 and allows the brightness to fade from low to high or from high to low with a single I2C bus command. This pattern has low bus traffic. 7. GUI: GRAPHICAL USER INTERFACE position setting – Use this position when connecting to the GUI. See details above for downloading and connecting to the GUI via the USB cable connection of DC2026C. dc2218af 6 DEMO MANUAL DC2218A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER LT3965 Matrix LED Dimmer Circuit Components 1 2 C1, C2 CAP., 0.1µF, X7R, 50V, 10%, 0402 MURATA, GRM155R71H104KE14D 2 2 C3, C6 CAP., 1µF, X7R, 50V, 10%, 0805 MURATA, GRM21BR71H105KA12L 3 0 C42-C59(OPT) CAP., OPTION, 0402 4 2 D4, D5 SCHOTTKY, RECTIFIER, 60V, 1A, SOD-123F NXP., PMEG6010CEH, 115 5 2 D12, D13 SCHOTTKY, RECTIFIER, 40V, 1A, SOD-123F NXP., PMEG4010CEH, 115 6 16 D15-D30 DIODE, PMEG4010CEJ SOD-323 NXP., PMEG4010CEJ, 115 7 2 Q4, Q5 TRANSISTOR, SOT-23 DIODES INC., FMMT593TA 8 2 R1, R2 RES., 49.9k, 1/10W, 1% 0603 VISHAY, CRCW060349K9FKEA 9 2 R3, R5 RES., 9.09k, 1/10W, 1%, 0603 VISHAY, CRCW06039K09FKEA 10 7 R4, R6, R7, R8, R18, R19, R83 RES., 10k, 1/16W, 1% 0402 VISHAY, CRCW040210K0FKED 11 2 R44, R47 RES., 1k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA 12 2 U1, U2 I.C. LT3965EFE TSSOP28 LINEAR TECH., LT3965EFE#PBF LT3797 Boost-then-Dual-Buck LED Driver Circuit Components 1 4 C4, C5, C12, C17 CAP., 0.1µF, X7R, 100V, 10%, 0603 MURATA, GRM188R72A104KA35D 2 1 C9 CAP., 22nF, X7R, 25V, 10%, 0402 MURATA, GRM155R71E223KA61D 3 2 C19, C37 CAP., 2200pF, X7R, 25V, 10%, 0402 MURATA, GRM155R71E222KA01D 4 2 C20, C21 CAP., 22µF, X5R, 10V 20%, 0603 MURATA, GRM188R61A226ME15D 5 1 C22 CAP., 1000pF, C0G, 25V, 5%, 0402 MURATA, GRM1555C1E102JA01D 6 1 C23 CAP., ALUM., 33µF, 50V, 6.3X7.7 PANASONIC, EEHZA1H330XP 7 1 C24 CAP., 4.7µF, X7R, 50V 10%, 1210 MURATA, GRM32ER71H475KA88L 8 7 C25-C30, C39 CAP., 10µF, X5R, 50V 10%, 1206 MURATA, GRM31CR61H106KA12L 9 1 C31 CAP., 1µF, X7R, 50V, 10%, 0805 MURATA, GRM21BR71H105KA12L 10 2 C32, C33 CAP., 1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C105KA12D 11 1 C34 CAP., 0.22µF, X5R, 10V 10%, 0603 MURATA, GRM188R61A224KA01D 12 1 C35 CAP., 0.1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C104KA01D 13 1 C36 CAP., 10µF, X5R, 10V, 10%, 0603 MURATA, GRM188R61A106KE69D 14 1 C38 CAP., 0.1µF, X7R, 50V, 10%, 0402 MURATA, GRM155R71H104KE14D 15 0 C40, C41(OPT) CAP., 0805 16 2 D1, D2 DIODE, DFLS260, POWER-DI-123 DIODES/ZETEX, DFLS260-7 17 1 D3 DIODE, PDS360, POWER-DI-5 DIODES/ZETEX, PDS360-13 18 6 D6-D11 DIODE, PMEG6010CEJ SOD-323 NXP., PMEG6010CEJ, 115 19 1 FB1 BEAD, CHIP, 742792150 WURTH ELEKTRONIK, 742792150 20 2 L1, L2 INDUCTOR, 33µH, WURTH ELEKTRONIK, 7447789133 21 1 L3 INDUCTOR, 15µH WURTH ELEKTRONIK, 7443551151 22 1 L4 IND., 47µH, SD SERIES, IND-SD25 EATON BUSSMANN, SD25-470-R 23 1 L6 INDUCTOR, 10µH WURTH ELEKTRONIK, 7443251000 24 2 M1, M2 N-CH MOSFET, Si7308DN, POWERPAK-1212-8 VISHAY, Si7308DN-T1-GE3 25 1 M3 N-CH MOSFET, Si7850DP, POWERPAK SO8 VISHAY, Si7850DP-T1-GE3 26 2 M4, M5 P-CH MOSFET, Si7611DN, POWERPAK-1212-8 VISHAY, Si7611DN-T1-GE3 (LEAD-FREE #) dc2218af 7 DEMO MANUAL DC2218A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 27 1 R10 RES., 47.5k, 1/16W, 1% 0402 VISHAY, CRCW040247K5FKED 28 2 R11, R12 RES., 5.6k, 1/16W, 5% 0402 VISHAY, CRCW04025K60JNED 29 1 R13 RES., 15k, 1/16W, 5% 0402 VISHAY, CRCW040215K0JNED 30 1 R15 RES., 0.02Ω, 0.5W, 1% 1206 SUSUMU, RL1632R-R020-F 31 2 R16, R17 RES., 0.05Ω, 0.5W, 1% 1206 SUSUMU, RL1632R-R050-F 32 2 R25, R26 RES., 0.5Ω, 0.5W, 1% 1206 SUSUMU, RL1632R-R500-F 33 2 R28, R31 RES., 44.2k, 1/16W, 1% 0402 VISHAY, CRCW040244K2FKED 34 3 R29, R30, R35 RES., 1M, 1/10W, 1% 0603 VISHAY, CRCW06031M00FKEA 35 1 R32 RES., 43.2k, 1/16W, 1% 0402 VISHAY, CRCW040243K2FKED 36 3 R33, R38, R39 RES., 10k, 1/10W, 1% 0603 VISHAY, CRCW060310R0FKEA 37 1 R40 RES., 249k, 1/16W, 1% , 0402 VISHAY, CRCW0402249KFKED 38 1 R41 RES., 38.3k, 1/16W, 1% , 0402 VISHAY, CRCW040238K3FKED 39 2 R42, R43 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA 40 1 R45 RES., 100k, 1/16W, 1% , 0402 VISHAY, CRCW0402100KFKED 41 1 U3 I.C., LT3797EUKG QFN(52)(UKG)-7MMX8MM LINEAR TECH., LT3797EUKG#PBF Additional Demo Board Circuit Components 1 1 DC2026C LINDUINO DEMO BOARD 2 2 C7, C8 CAP., 0.1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C104KA01D 3 3 C10, C11, C13 CAP., 1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C105KA12D 4 1 C14 CAP., 0.22µF, X5R, 6.3V 10%, 0402 MURATA, GRM155R60J224KE01D 5 1 C15 CAP., 1µF, X7R, 50V, 10%, 0805 MURATA, GRM21BR71H105KA12L 6 1 C16 CAP, 22µF, X7R, 6.3V, 20%, 1206 MURATA, GRM31CR70J226KE19L 7 1 C18 CAP, 22pF, NPO, 5% 50V, 0402 MURATA, GRM1555C1H220JA01D 8 1 D14 LED, GREEN, DIFFUSED, 0805 AVAGO, HSMG-C170 9 1 D31 LED, YELLOW, DIFFUSED, 0805 AVAGO, HSMY-C170 10 1 D32 LED, RED WURTH ELEKTRONIK, 150080SS75000 11 1 L5 IND, 33µH TOKO, A914BYW-330M=P3 12 16 LED1-LED16 LED, XLAMP XP-E2 SERIES CREE INC., XPEBWT-L1-0000-00D50 13 3 Q1, Q2, Q3 TRANSISTOR, MOSFET, N-CH 60V, 150mA, SOT-23 DIODES INC., VN10LFTA 14 1 R9 RES., 57.6k, 1/10W, 1%, 0603 VISHAY, CRCW060357K6FKEA 15 1 R14 POT., 10k, 10%, 1 TURN BOURNS, 91A1A-B28-A15L 16 3 R20, R21, R48 RES., 1k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA 17 1 R22 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA 18 1 R23 RES., 604k, 1/16W, 1% , 0402 VISHAY, CRCW0402604KFKED 19 1 R24 RES., 200k, 1/16W, 1% , 0402 VISHAY, CRCW0402200KFKED 20 1 R27 RES., 100Ω, 1/10W, 5% 0603 VISHAY, CRCW0603100RJNEA 21 3 R34, R36, R37 RES., 5.1k, 1/10W, 5% 0603 VISHAY, CRCW06035K10JNEA 22 1 R46 RES., 2.49k, 1W, 5% 2512 VISHAY, CRCW25122K49FKEG 23 4 R49, R50, R51, R52 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 24 2 R53, R54 RES., 0Ω, 1/16W, 0402 VISHAY, CRCW04020000Z0ED dc2218af 8 DEMO MANUAL DC2218A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION 25 MANUFACTURER/PART NUMBER 0 R55, R81, R82(OPT) RES., OPTION, 0603 26 0 R56-R79(OPT) RES., OPTION, 0402 27 0 R80(OPT) RES., OPTION, 2512 28 1 U4 I.C., LTC6900, TSOT-23-5 LINEAR TECH., LTC6900CS5#PBF 29 1 U5 I.C., LT6656 TSOT-23-6 LINEAR TECH., LT6656ACS6-3#PBF 30 1 U6 I.C., LT3470AEDDB, DFN8DDB LINEAR TECH., LT3470AEDDB#PBF Hardware: For Demo Board Only 1 6 E1-E6 TESTPOINT, TURRET, 0.094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0 2 6 E7-E12 TESTPOINT, TURRET, 0.064" MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0 3 10 JP1(4 ea), JP2(4 ea), JP3, JP4 HEADER, 3 PIN 0.079" SINGLE ROW WURTH ELEKTRONIK, 62000311121 4 10 xJP1(4 ea), xJP2(4 ea), xJP3, xJP4 SHUNT, 0.079" CENTER 5 0 J1, J3, J12, J13(OPT) 6 0 J2 (OPT) R ANGLED HEADER, 2X10, 0.1" WURTH ELEKTRONIK, 61302021021 7 1 J4 HEADER, 10PIN, 0.100 SINGLE ROW WURTH ELEKTRONIK, 61301011121 8 2 J5, J9 HEADER, 8PIN, 0.100 SINGLE ROW WURTH ELEKTRONIK, 61300811121 9 0 J6 (OPT) R ANGLED SOCKET HEADER, 2X10, 0.1" WURTH ELEKTRONIK, 613020243121 10 1 J7 THROUGH HOLE CONNECTOR, POWER JACK, 2.1mm CUI INC., PJ-002AH 11 1 J8 HEADER, 6PIN, 0.100 SINGLE ROW WURTH ELEKTRONIK, 61300611121 12 2 J10, J11 CONNECTOR, BANANA JACK KEYSTONE, 575-4 13 8 MH1-MH8 STAND-OFF, NYLON, 22.2mm WURTH ELEKTRONIK, 702938000 14 2 ACRYLIC-SHIELD ACRYLIC-SHIELD, 1/8" THICK, SMOKE (GRAY COLOR) JB MACHINING, 2074 15 6 STANDOFF NYLON, 0.75" KEYSTONE, 1903D 16 6 SPACER NYLON, 0.5" KEYSTONE, 886 17 6 SCREW NYLON, 1.25" KEYSTONE, 9340 18 1 S1 SWITCH, ROTARY, 8 POSITIONS APEM, PT65526 19 1 S2 SWITCH, PUSHBUTTON, MINIATURE WURTH ELEKTRONIK, 434111025826 20 1 S3 SWITCH, B3SL SERIES OMRON, B3SL-1002P WURTH ELEKTRONIK, 60800213421 dc2218af 9 DEMO MANUAL DC2218A SCHEMATIC DIAGRAM dc2218af 10 DEMO MANUAL DC2218A SCHEMATIC DIAGRAM dc2218af Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 DEMO MANUAL DC2218A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation dc2218af 12 Linear Technology Corporation LT 1215 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2015