LD48 datasheet(4/4 Pages) MPD

4 / 4 page

MicroPower Direct

We Power Your Success - For Less!

292 Page Street Ste D Stoughton, MA 02072

•

TEL: (781) 344-8226

•

FAX: (781) 344-8481

•

E-Mail: sales@micropowerdirect.com

www.micropowerdirect.com

Notes:

• All dimensions are typical in inches (mm)

• Tolerance x.xx = ±0.02 (±0.50)

• Pin 1 is marked by a “dot” or indentation on the top of the unit

Pin Connections

Color

LD48-xx-xxxW

Color

LD48-xx-xxxWA

Black

-VIN

-DC Supply

Black

-VIN

-DC Supply

White

No Wire

White

VADJ

PWM, On/Off

Blue

-LED LED Cathode Conn.

Blue

-LED LED Cathode Conn.

Yellow

+LED

LED Anode Conn.

Yellow

+LED

LED Anode Conn.

Red

+VIN

+DC Supply

Red

+VIN

+DC Supply

Mechanical Dimensions

Analog Output Current Control

The output current of the unit can also be set by

adjusting the voltage level on the VADJ input to a

value between 0.3V to 1.25V (IOUT will vary from

25% to 100% of rated output current). Care must

be taken not to exceed 1.25V on this input, or

the driver may be damaged.

A simple analog circuit using two low cost,

switching regulators is shown at left. Work-

ing from inputs that can range from 15 to 32

VDC,the top regulator (SR1) keeps the input to

the LED driver at 12 VDC.

The other regulator (SR2), driven off the same

input line maintains the control voltage (for the

VADJ input) at 5 VDC. The resister network of R1

and R2 can now be used to set the output cur-

rent level of the LED driver. This level is equal to:

ADJ

CTRL

In the second circuit, the 5 VDC regulator (SR2)

is replaced by the shunt regulator (D1) circuit

connected in parallel with the resistor network.

The regulator will maintain the voltage across R2

and R3 at 2.5 VDC, insuring that the 1.25 VDC

limit on the VADJ pin will not be exceeded. This

circuit will work for inputs between 7VDC and

approximately 36 VDC. For inputs between 36

VDC and 60 VDC, a zener diode (D2) has been

added.

When using the analog control input, the nominal

output current is equal to:

125

NOM

MAX

ADJ

The VADJ input should be left open if not used.

Grounding VADJ will shut the unit down. Connect-

ing VADJ to directly to +VIN may damage the unit.

Analog Output Current Control (7 - 36 VDC IN)

Analog Output Current Control (36 - 60 VDC IN)

LD48 датащи(PDF) 4 Page - MicroPower Direct, LLC

LD48 датащи(HTML) 4 Page - MicroPower Direct, LLC

Html Pages

1 2 3 4

датащи скачать

ссылки URL