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LD24 データシート(PDF) 4 Page - MicroPower Direct, LLC

部品番号 LD24
部品情報  LD24
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メーカー  MPD [MicroPower Direct, LLC]
ホームページ  http://www.micropowerdirect.com
Logo MPD - MicroPower Direct, LLC

LD24 データシート(HTML) 4 Page - MicroPower Direct, LLC

  LD24 Datasheet HTML 1Page - MicroPower Direct, LLC LD24 Datasheet HTML 2Page - MicroPower Direct, LLC LD24 Datasheet HTML 3Page - MicroPower Direct, LLC LD24 Datasheet HTML 4Page - MicroPower Direct, LLC  
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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
Mechanical Dimensions - 16 Pin DIP
Analog Output Current Control
Analog Output Current Control (7 - 30 VDC IN)
Mechanical Dimensions - 14 Pin DIP
Pin Connections - 16 Pin DIP
Pin
Function
1-VIN
-DC Supply
9
+LED
LED Anode Conn.
2-VIN
-DC Supply
10
+LED
LED Anode Conn.
3VADJ
PWM, On/Off
15
+VIN
+DC Supply
7
-LED LED Cathode Conn.
16
+VIN
+DC Supply
8
-LED LED Cathode Conn.
Pin Connections - 14 Pin DIP
Pin
Function
1-VIN
-DC Supply
8
+LED
LED Anode Conn.
2VADJ
PWM, On/Off
14
+VIN
+DC Supply
7
-LED LED Cathode Conn.
In the second circuit, the input DC/DC has been changed to
the F2506RU. The 4:1 input of the converter allows for wider
input bus levels (in this case 24 VDC). The POL regulator
is also replaced by the shunt regulator (D1). The regulator,
connected in parallel with the resistor network, 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.
When using the analog control input, the nominal output
current is equal to:
.
II
x
V
125
NOM
MAX
ADJ
=
The VADJ input should be left open if not used. Grounding
VADJ will shut the unit down. Connecting VADJ to directly
to +VIN may damage the unit.
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.
The simple analog circuit at left uses the F2506RW,
a 30W, dual 15V output DC/DC converter. Operating
from an input line of 12 VDC, the converter sets the
input to the LED driver at 30 VDC.
The POL regulator, 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 current level of the LED
driver. This level is equal to:
V
RR
R
XV
12
2
ADJ
CTRL
=
+


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