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Features
LED DRIVER
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70W Buck LED Driver
Constant Current Output (350 to 1200mA)
Digital PWM and Analogue Voltage Dimming
High Efficiency to 96%
EN, UL and RAILWAYS Certified
Metal or Plastic Case Version
IP67 Rated for /W, Plastic Case Version
5 Year Warranty
LIGHTLINE
DC/DC-Converter
with 5 year Warranty
Description
The RCD-48 series is a step-down constant current source designed for driving high power LED applications.
Four output currents are available. The maximum output voltage is 56V. The buck drivers have digital PWM
and/or analogue voltage dimming control and are special featured with very high efficiency. Typical applications
are 48V bus lighting solutions or high voltage LED arrays (e.g. high bay lights).
Constant
Current
Selection Guide
Part
Number
RCD-48-0.35*
RCD-48-0.50*
RCD-48-0.70*
RCD-48-1.00*
RCD-48-1.20/M
Input
Range
(VDC)
9-60
9-60
9-60
9-60
9-60
Output
Current
(mA)
0-350
0-500
0-700
0-1000
0-1200
Output
Voltage
(VDC)
2-56
2-56
2-56
2-56
2-56
Dimming
Control
Digital + Analogue
Digital + Analogue
Digital + Analogue
Digital + Analogue
Digital + Analogue
Efficiency
Typ.
(%)
96
96
96
96
96
Buck LED
Driver
*add suffix “/W“ for wired version with Vref output and analogue + PWM dimming control (seven wires)
Note:
Add suffix “/M“ for metal case (RCD-48-1.20/M only). No metal case with wires available.
Standard version (no suffix) and wired version (suffix /W) only in plastic case.
Specifications (typical at 25°C, nominal input voltage, rated output current unless otherwise specified )
RoHS
2011/65/EU
6/6
E224736
Operating Input Voltage Range 9-60VDC
Absolute Maximum Input Voltage 65VDC max.
Output LED String Voltage Range 2V min. / 56V max.
(depand on the input voltage, defined by the output impedance, see Safe Operating Area)
Input Filter Capacitor
Output Current Accuracy ±3% typ. / ±5% max.
Internal Power Dissipation 350mA 0.8W typ.
(Vin=60V, Vout=56V) 500mA 1.0W typ.
700mA 1.1W typ.
1000mA 1.3W typ.
1200mA 1.4W typ.
Output Current Stability Vin=60V, Vout=2-56V, Iout=350-1200mA ±1% max.
Output Ripple and Noise (20MHz BW) Vin=60V, Vout=2-56V, Iout=350-1200mA 300mVp-p max.
Maximum Capacitive Load 100μF max.
Switching Frequency 50kHz min. / 1000kHz max.
Efficiency at Full Load 96% typ.
PWM DIMMING CONTROL & REMOTE ON/OFF CONTROL
EN-50121-3-2 Certified
EN-60950-1 Certified
UL-60950-1 Certified
RCD-48
Derating Graph
Input Voltage Range 5V typ. / 10V max.
1200
50
Threshold Voltage Device ON 0.5V max.
Device OFF 2.0V min.
Frequency 100Hz min. / 1000Hz max.
ANALOGUE DIMMING CONTROL (Leave open if not used - do not tie to +V in )
Input Voltage Range 0V min. / 10V max.
Control Voltage Range 0V min. / 5.1V max.
Note: The analogue dimming range is from 0% to 100%, but the output can be unstable below 10%, when using the analo-
1000
700
500
350
300
Natural Convection
60
75
80
gue dimming function.
Vref Version
Vref Voltage
4.95V
-40
0
20
40
50 60 80
100
Vref Output Current
Vref Output Short Circuit Current
0.5mA
0.1μA typ.
Ambient Temperature Range (°C)
Ambient Temperature
(free air convection)
350mA
500mA
700mA
1000mA
-40°C to +80°C
-40°C to +80°C
-40°C to +75°C
-40°C to +60°C
1200mA
Analogue and PWM Dimming Control Note: Leave open if not used - do not tie to +Vin
L-12
-40°C to +50°C
continued on next page
REV: 1/2014
Refer to Application Notes
www.recom-power.com
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