Avago Technologies ASMT-FG10-NFJ00 User Manual

Surface Mount Auto Focus Lamp

Design Guide

Avago Technologies ASMT-FJ10 and ASMT-FG10 are an
SMT (Surface Mount Technology) dome lamp. They use
an untinted, nondiused lens to provide a high luminous
intensity within a narrow radiation pattern. These devices
are made by encapsulating LED chips onto axial lead
frames to form molded epoxy lamp packages with six
bended leads for surfacing mounting.

The colors available for the SMT Lamp package is 530nm
Green and 605nm Orange.

This narrow angle SMT lamp package is designed for ap­plications which require long distance illumination and
narrow beam pattern such as auxiliary ash for auto­focus function in digital still camera.

This package is compatible with the Pb-free 2x reow
soldering process.

Features

• Smooth, consistent narrow radiation pattern

• 8° viewing angle for Orange,
6° viewing angle for Green.

• 4.8 L x 4.8 W X 5.33H mm package dimension

• Low power consumption with good intensity output,

typical 22cd for Orange and 40cd for Green at 20mA.

• RoHS compliant

Eye safety classication

The Orange and Green surface mount AF lamps are
used for camera applications. The Orange LED is safe
to operate under all driving conditions up to 50mA;
however the Green LED is limited by the current.

The LED lenses focus the divergent beam of light 10mm
from the front of the lens, If no collimating optics are
added to the optical path, the Orange LEDs placed in a
product, would create a Class 1 LED to IEC/EN 60825-1
(2001) under all conditions of operation and single fault
failure.

The Green LED is tested as Class 1 to IEC/EN 60825-1
(2001) under operation at 20mA. This LED is not recom­mended to drive beyond 20mA as part may fall in the
classication of Class 2M to IEC/EN 60825-1 (2001).

Avago’s Recommended AF LED Holder Design

The LED holder design is critical to position the LED to
focus the image. If the LED is tilted, the sensor will detect
the incorrect information which will aect the focal point
accuracy.

Two types of holder design are recommended: the “U”
type and “enclose” type

Applications

The images below are of digital still cameras with auto
focus function.

Recommended “U” type holder for Avago AF LED

2