SP6686EB Datasheet, PDF (1/4 Pages) Sipex Corporation – Evaluation Board Manual

SP6686EB
Evaluation Board Manual
ƒ 2.7V to 5.5V Input Range
ƒ Typical 150mA Torch or 400mA
Flash Output Current
ƒ High Efficiency in 1X mode, high
V_OUT in 2X mode
ƒ Small 3x3mm 10-Pin DFN Package
ƒ 2.4MHz Switching Frequency
Enables Small Components
ƒ Integrated Design with Minimal
Components.
ƒ 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
Cin ^CF
1 4.7uF .47uF
2
3
SP6686
1
Vin
10
VOUT
2 _C1
PGND ⁹
3 _C2
SGND ⁸
4 _FLASH
IFB ⁷
5 _EN
ISET ⁶
Cout
2.2uF
R EN
SW1
10K
R SET
106K
D1
1W LED
Vfb=50mV Torch 150mA
132mV Flash 400mA
R FB
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