SP6686EB
Evaluation Board Manual
2.7V to 5.5V Input Range
Typical 150mA Torch or 400mA
Flash Output Current
High Efficiency in 1X mode, high
V
OUT
in 2X mode
Small 3x3mm 10-Pin DFN Package
2.4MHz Switching Frequency
Enables Small Components
Integrated Design with Minimal
Components.
Use with 1 cell Lithium Ion Battery
DESCRIPTION AND BOARD SCHEMATIC
The
SP6686EB Evaluation Board
is a compact circuit including the SP6686 in 3x3mm DFN
and 3 small 0603 capacitors which can provide a stable drive current for a 1W LED such as the
AOT White LED, Lumi-LEDs Luxeon I or PWF1 type light sources. The evaluation board is a
completely assembled and tested surface mount board which provides easy probe access
points to all SP6686 inputs and outputs so that the user can quickly connect and measure
electrical characteristics and waveforms.
SP6686EB Schematic
Vin: 3.0-4.2V
J2
SP6686
1
Vin
C1
C2
FLASH
EN
VOUT
PGND
SGND
IFB
ISET
10
9
8
7
6
CF
Cin
1
4.7uF .47uF
2
3
2
3
4
5
Cout
2.2uF
D1
1W LED
Vfb=50mV Torch 150mA
132mV Flash 400mA
R SET
106K
R FB
SW1
R EN
10K
0.33Ohm
Push ON
TO GET STARTED:
1. Connect VIN from VIN to GND (VIN range 2.7V to 4.2V).
2. Select mode between TORCH and FLASH by putting jumper into corresponding position.
3. Apply High to ON terminal to turn the LED on.
Rev 04/19/05
SP6686EB Evaluation Board Manual
Copyright 2005 Sipex Corporation
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