Jun20-07

SP7680 Evaluation Board Manual

© 2007 Sipex Corporation

Page 1 of 6

___________________________________________________________________ DESCRIPTION

The SP7680EB Evaluation Board is a compact circuit including the SP7680 in 3x3mm QFN and 4

small 0402 or 0603 capacitors. This circuit can provide a stable drive current for backlight white

LEDs and with I

as the keypad. The evaluation board is a completely assembled and tested surface mount board

which provides easy probe access points to all SP7680 inputs and outputs so that the user can

quickly connect LEDs and measure electrical characteristics and waveforms.

_____________________________________________________________ BOARD SCHEMATIC

Complete Backlight Solution

Separate control for 4 main, 2 sub, and

keypad LEDs

Built-in 6-bit DAC for precise current setting

I

Data is stored in shutdown

1x and 1.5x mode operation with automatic

switchover

Very low dropout current sources: 200mV typ

2MHz switching frequency reduces external

components

Small 16-pin 3x3 QFN

Solved by

TM

SP7680

Evaluation Board Manual