TSL2671

DIGITAL PROXIMITY DETECTOR

TAOS118 − JANUARY 2011

21

The LUMENOLOGY

r Company

r

r

Copyright

E 2011, TAOS Inc.

www.taosinc.com

APPLICATION INFORMATION: HARDWARE

If the hardware application requires more than 100 mA of current to drive the LED, then an external transistor

should be used. Note, R2 should be sized adequately to bias the gate voltage given the LDR current mode

setting. See Figure 15.

TSL2671

1

mF

SCL

SDA

INT

R1

LDR

LED

R2

1

mF

Figure 15. Application Hardware Circuit for Proximity Sensing with External LED Driver Using P-FET

Transistor

PCB Pad Layout

Suggested PCB pad layout guidelines for the Dual Flat No-Lead (FN) surface mount package are shown in

Figure 16.

400

2500

400

1000

1700

650

1000

650

Note: Pads can be

extended further if hand

soldering is needed.

NOTES: A. All linear dimensions are in micrometers.

B. This drawing is subject to change without notice.

Figure 16. Suggested FN Package PCB Layout