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LDU4860S250 Scheda tecnica(PDF) 4 Page - XP Power Limited

Il numero della parte LDU4860S250
Spiegazioni elettronici  Constant Current Output
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Produttore elettronici  XPPOWER [XP Power Limited]
Homepage  http://www.xppower.com
Logo XPPOWER - XP Power Limited

LDU4860S250 Scheda tecnica(HTML) 4 Page - XP Power Limited

  LDU4860S250 Datasheet HTML 1Page - XP Power Limited LDU4860S250 Datasheet HTML 2Page - XP Power Limited LDU4860S250 Datasheet HTML 3Page - XP Power Limited LDU4860S250 Datasheet HTML 4Page - XP Power Limited  
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21-Aug-14
+
-
+
-
+Vout
- Vout
C2
C3
C1
L1
LDU
Input Filter to meet Class B Conducted Emissions
+Vout
- Vout
Control LDU
-Vin
LDU
+Vout
- Vout
-Vin
GND
PWM
0V
1.25V
Control
LDU08 48
By connecting a variable resistor between control
and GND, simple dimming can be achieved.
Capacitor is optional for HF noise rejection.
Recommended value is 0.22 µF.
The output current can be determined using the equation:
Where the value of R is between 0 and 2 M
Ω,the
maximum adjustment range of output current is 25% to 90%
(For Vin-Vout, LDU08 & 24: <20 VDC, LDU48: <30 VDC )
Output Current Adjustment by Variable Resistor
Output Current Adjustment by DC Voltage
Output Current Adjustment by PWM
Directly driving control input
A Pulse Width Modulated (PWM) signal with duty cycle
DPWM can be applied to the control pin, as shown:
Application Notes
LDU
Control
+Vout
-Vout
+
-Vin
The output current is given by:
Control Voltage Range: 0.3 V to 1.25 VDC
Iout = Iout nom x Control
Iout = Iout nom x Dpwm (Dpwm = PWM duty cycle)
LDU08
LDU24
LDU48
C1
10 µF
10 µF
4.7 µF
C2
Not Fitted
Not Fitted
4.7 µF
C3
47 µF
47 µF
Not Fitted
L1
68 µH
68 µH
47 µH
Iout =
Iout nom x R
(R + 200 k)
Iout =
For LDU48
For LDU08-24
Iout nom x R
(R + 50 k)
1.25


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