PO170

Typical applications

Direct replacement CdS LDR;

Adjust background light,such as television,PDA,Cameras,LCD/LEDdisplays and mobile phones,etc.;

Control toys and lighting equipment.

Characteristic

Special filter epoxy encapsulation,spectral response characteristicssimilarto the human eys;

Linear output with light changes;

Have certain temperature stability;

Low dark current,low intensity of illumination;

RoHS.

Structure diagram(unit:mm)

Limit parameters Ta-25℃

Photoelectric Characteristic

Photoelectric Characteristic Curve

Test Principle Diagram

Applied Examples

Optical Lamp Principle Diagram

Above for optical streetlights during the day, street lamp extinguishes circuit automatically litlamps at night. Figure, capacitance C1,C2,R3 and diode D1 and regulator tube Dw,

composition simple capacitance step-down, switch on the power rectifier circuit for the DCvoltage 12V or so.Transistor BG, environmental light detectors PO170 and bidirectionalthyristor, photoelectric switch circuit composed.

During the day, environmental light detectors PO170 by light show low resistance, BGpipe base potential fell, the BG deadlines, no voltage output resistance R1, so bidirectionalthyristor SCR at shutoff state, bulb technologies not bright.

When night falls, environmental light detectors P0170because there is no light its darkresistance increases, make BG base potential rise and conductivity, the output voltage triggeron R1 conduction, streetlights SCR silicon to electric light. Adjust potentiometer W, adjustableheight, namely BG base potential adjust the sensitivity of the mastery of light.

Note

1,Don't exceed the product specification limits in use;

2, Specification mentioned for reference only, the applied circuit in practical applicationaccording to the specific needs to circuit design and adjustment parameters;

3, Welding temperature and time can't exceed rated range, the welding process of or weldingcomplete avoid external force in pins, don't repeat welding;

4,This product meet the RoHS requirement;

5,Product surface damage and pollution can affect current, avoid too in damp environment anduse;

6, The product standard packaging for 3,000pcs packaging.

Limit parameters Ta-25℃

Photoelectric Characteristic

Photoelectric Characteristic Curve