SP6652LED Datasheet, PDF (2/4 Pages) Sipex Corporation – Evaluation Board Manual

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 chart shows the efficiency data for different
applications.
SP6652LED 3 or 4 Cell to 1W LumiLEDs
100
400
350
95
300
90
250
85
200
80
1W Efficiency
150
1W Iout
100
75
50
70
0
2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0
Vin (V)
100
95
90
85
80
75
70
2.8
SP6652LED 3 or 4 Cell to 3W LumiLEDs
3W Efficiency
3W Iout
3.2 3.6 4.0 4.4 4.8 5.2 5.6
Vin (V)
1000
900
800
700
600
500
400
300
200
100
0
6.0
Fig. 1 Efficiency data of the SP6652LED evaluation board
Date: 05/15/06 RevA
SP6652LED Evaluation Board Manual
Page 2 of 4
Copyright 2006 Sipex Corporation