SP6685EB Datasheet, PDF (1/4 Pages) Sipex Corporation – Evaluation Board Manual

SP6685EB
Evaluation Board Manual
ƒ 2.7V to 4.2V Input Range
ƒ Typical 200mA Torch or 700mA
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 SP6685EB Evaluation Board is a compact circuit including the SP6685 in 3x3mm DFN
and 3 small 0603 capacitors which can provide a stable drive current for a 1W LED such as the
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
SP6685 inputs and outputs so that the user can quickly connect and measure electrical
characteristics and waveforms.
SP6685EB Schematic
Vin: 2.7-5.5V
Cin
10uF CF
1uF
Flas h/Torch
EN ABL E
SP6685
1
VIN
10
VOUT
2 _C1
PGND ⁹
3
C2
8
SGND
4 _FLASH
FB ⁷
5
EN
6
RSET
Cout
4.7uF
RSET
88.7K
D1
PWF1
VFB = 50mV Torch 200mA
150mV Flash 700mA
RSENSE
0.22ohms
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 02/23/05
SP6685EB Evaluation Board Manual
Copyright 2005 Sipex Corporation