SP6652LED SIPEX | Alldatasheet
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Date: 05/15/06 RevA SP6652LED Evaluation Board Manu al Copyright 2006 Sipex Corporation DESCRIPTION AND BOARD SCHEMATIC The SP6652LED Evaluation Board is a compact circuit that was built on SP6652 and c an provide a stable drive current for a 1W or 3W Luxeo n type light source. The SP6652 is an integrated synchronous buck regulator configured to provide constant output current for this application. The evaluation board is a completely a ssembled and tested surface mount board which provides easy probe access points to all SP66 52 inputs and outputs so that the user can quickly connect and measure electrical characteristics and waveforms. /square4 3V to 5.5V Input Range /square4 Accurate 350mA or 900mA Output Current /square4 High Efficiency /square4 Small 10-Pin MSOP Package /square4 1.2MHz Switching Frequency Enables Small Components /square4 Integrated Design with Minimal Components. /square4 Use 4 cell alkaline, NiCad, NiMH, or 1 cell Lithium Ion Battery or 3.3V or 5V Logic supply LMV321 OUT Rb1 L1 4.7uH Vref Rb2 100mOhm 140K R4 Open: 1W R4 Short: 3W 0.75V COUT 10uF SP6652 U1 5 6
10 PGND
10.0 J1 R1 10K SHDN 1W or 3W Luxeon Cc 10nF VOUT VIN=3.0~5.5 V CVIN 1.0uF Rz 100 SP6652LED Evaluation Board Manual
Date: 05/15/06 RevA SP6652LED Evaluation Board Manu al Copyright 2006 Sipex Corporation Page 2 of 4 USING THE EVALUATION BOARD 1) Powering Up the SP6652LED Circuit The SP6652LED Evaluation Board can be powered from 4 cell alkaline, NiCad, NiMH, or 1 cell Lithium Ion Battery or 3.3V or 5V Logic supply. Connect with short leads directly to the “VIN” and “GND” posts. Plug the 1W Luxeon I or 3W Luxeon III between the “VOUT” and “Vref” posts. 2) Using the J1 Jumper for ON/OFF Control When the hat is put on 1 & 2 position, the SHDN pin is connected to Vin. When the hat is put on 2 & 3 position, the SHDN pin is tied to ground and the part will be in shutdown mode. 3) Select from 1W or 3W Application The board was set up for 1W application as default. In this application, R4 was open. When the customer need to use this board to drive Luxeon III, short R4 by using a 0 Ohm resistor. POWER SUPPLY DATA For the standard evaluation board, the following ch art shows the efficiency data for different applications. SP6652LED 3 or 4 Cell to 1W LumiLEDs 100 Vin (V) Efficiency (%) 100 150 200 250 300 350 400 Iout (mA) 1W Efficiency 1W Iout SP6652LED 3 or 4 Cell to 3W LumiLEDs 100 Vin (V) Efficiency (%) 100 200 300 400 500 600 700 800 900 1000 Iout (mA) 3W Efficiency 3W Iout Fig. 1 Efficiency data of the SP6652LED evaluation board
Date: 05/15/06 RevA SP6652LED Evaluation Board Manu al Copyright 2006 Sipex Corporation Page 4 of 4 TABLE1: SP6652LEDEB LIST OF MATERIALS Ref. Des. Qty. Manufacturer Part Number Layout Size Comp onent Vendor LxWxH U1 1 Sipex Corp. SP6652 MSOP-10 High Efficiency Current Mode Buck Regulator Sipex 978-667-8700 U2 1 National Semi LMV321M5 SOT23-5 Rail-to-Rail Output Operational Amplifiers National Semi C1N, COUT 2 TDK Corp C2012X5R0J106M 0805 10uF/6.3V/X5R/ Ceramic TDK 847-803-6100 CVIN 1 TDK Corp C1608X5R1A105K 0805 1uF/10V/X5R/ Ceramic TDK 847-803-6100 Cc 1 TDK Corp C1608X7R1H103K 0805 10nF/50V/X7R/ Ceramic T DK 847-803-6100 D 1 LumiLEDs Luxeon I and III Open LumiLEDs Rb1 1 Vishay CRCW0603R047F 0603 0.047 Ohm 1/16W 1% 0603 SM www.vishay.com Rb2 NU RVIN 1 Panasonic 0603 10 Ohm 1/16W 1% 0603 SM 800-Digi-K ey Rz 1 Panasonic 0603 100 Ohm 1/16W 1% 0603 SM 800-Digi-Ke y R1 1 Panasonic 0603 10K Ohm 1/16W 1% 0603 SM 800-Digi-Ke y R2 1 Panasonic 0603 140K Ohm 1/16W 1% 0603 SM 800-Digi-K ey R3 1 Panasonic 0603 280K Ohm 1/16W 1% 0603 SM 800-Digi-K ey R4 1 Panasonic 0603 Open 800-Digi-Key RI, RF 2 Panasonic 0603 Open 800-Digi-Key J1 1 3-Pin Jumper 800-Digi-Key SP6652LEDEB List of Materials
ORDERING INFORMATION
Model Temperature Range Package Type