LEDC003 USER GUIDE Performance: • • • • • • Color Temperature range: 2900K-8300K Viewing angle: 120° Maximum drive current: 350mA Thermal resistance: 5°C/W Max. junction temperature: 150°C Electrically neutral thermal path The PCB construction is a single layer of printed copper. There is a solid aluminium backing for heat dissipation. The material used [1] is Aismalibar Cobritherm™ or similar, 1.5mm Al, 110µm dielectric and 35µm copper. It features 4 holes for M2.5 fixings if required. The board is fitted with a male 6-pin input connector. This mates with any of the Diodes Zetex Evaluation boards which are fitted with a suitable socket. At the opposite end, a female connector is fitted, to allow multiple LED extensions as shown in the schematic below. Ordering Information Order Number LEDC003 Description A jumper link is used to allow connection of the LED as the NEXT or LAST in the chain. A further jumper link is provided to select whether the thermistor on the board is connected (position TH), or whether the connection is passed to a board further down the chain (PASSTH). This demonstration circuit consists of a simple connectable printed circuit board carrying a ® CREE MX-6 lamp, a thermistor and switching links. It allows the evaluation and testing of attachable Zetex LED driver circuits with varying numbers of series connected LEDs. Further information can be obtained from: http://www.cree.com/products/pdf/XLa mpMX-6.pdf Issue 1 – January 2010 www.diodes.com © Diodes Incorporated 2010 1 of 4 LEDC003 Schematic D1 IN- LuxeonK2 A THOUT JP2 1 2 3 OUT- TH JP1 Select Thermistor PL1 ININTHIN THC IN+ IN+ PASSTH 6 5 4 3 2 1 3 2 1 R1 10k THIN THC NEXT LAST Select LED OUT+ 6 5 4 3 2 1 OUTOUTTHOUT THC OUT+ OUT+ SK1 PCB Layout Top Side USAGE There are two circuits on the board: the LED circuit and the thermistor circuit. The input (PL1) and output (SK1) connector pins 1+2 and 5+6 are used for the LED, and 4 and 5 are used for the thermistor. LED circuit If only one LED board is being used, or is the last in a chain of several boards, the jumper JP1 should be inserted in the 'LAST' position. This connects the LED directly across pins 1+2 and 5+6 of input connector PL1. If several boards are being used in a chain, and the board concerned is not in the last position, the jumper JP1 should be inserted in the 'NEXT' position. This connects the LED in series between pins 5+6 on the input connector PL1 and pins 5+6 on the output connector SK1. It is not possible to configure the board for multiple LEDs in parallel. Issue 1 – January 2010 www.diodes.com © Diodes Incorporated 2010 2 of 4 LEDC003 Thermistor circuit In cases where the thermistor is not required, the position of JP2 is irrelevant but it should be removed if any other connections are made to pins 4 and 5 of PL1 or SK1. If the thermistor is required, and only one LED board is being used, the jumper JP2 should be inserted in the 'TH' position. This connects the thermistor directly across pins 3 and 4 of the input connector PL1, thus making the thermistor 'active'. If several boards are being used in a chain, the board on which the thermistor is required to be active should be set with JP2 in the 'TH' position. All the other boards should be set with JP2 in the 'THPASS' position. This disconnects the other thermistors and creates a direct link between pin 4 on the input connector PL1 and pin 4 on the output connector SK1. It is not possible to configure the board for multiple thermistors in parallel. Parts List Count Designator Description Package Manufacturer 1 D1 Cree MX-6 X-lamp - Cree MX6AWT 1 R1 10kΩ Thermistor 0805 Vishay 2381 615 2 JP1, JP2 3- way headers for links - Samtec TSM-103-02-L-SV ® ® Part Number ® Input/ Output Count Designator Description 1 PL1 6 pin Input power connector (male) Horizontal header 1 SK1 Output connector (female) Function Connection to LED driver or to previous LED demonstration board in series Allows connection for new demonstration board to be added in series Manufacturer Part Number Samtec TSM-106-03L-SH Samtec SSM-106-LSH Recommended Operating Conditions Symbol VF Parameter Typ Max Units Forward Voltage at IIF = 300mA 3.3 3.8 V Forward current - 350 mA IF [1] Cobritherm is a trademark of the Aismalibar Corporation Cree is a registered trademark of Cree, Inc. ® Specifications given which relate to Cree devices are provided in good faith, but may be changed ® without notice, and should be verified with Cree before use. 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