Page 1
LIGHTLINE
DC/DC-Converter
with 5 year Warranty
RCD-24/PL
● SMD Constant Current LED Driver
● Built-in Class A or Class B EMC Filter
● Wide Input and Output Voltage Range
● Digital PWM and Analogue Voltage Dimming
● Short Circuit and Overtemperature Protected
● Low Cost
● EN/RAILWAYS Certified
● 5 Year Warranty
Features
Regulated
Converters
Selection Guide
Input Voltage (absolute maximum) 40VDC max
Recommended Input Voltage 6V min. / 24V typ. / 36VDC max
Input Filter Suffix /A Capacitor
Suffix /B Class B with Pi Filter
RCD-24-1.00/PL/A Class A with Pi Filter
Output Current Accuracy (Vin=24V) 300-700mA ±2% typ, ±3% max
1000mA ±3% typ, ±5% max
Internal Power Dissipation Worst case load of 5 LEDs (300-700mA) 700mW max.
Worst case load of 8 LEDs (1000mA), Vin=36V 1.6W typ.
Output Current Stability Vin = 36V, Vout = 1-9 LEDs (300-700mA) ±1% max
Vin = 36V, Vout = 1-8 LEDs (1000mA) ± 1.5% max.
Output Ripple and Noise (20MHz BW) Vin=36V, Vout =1-9 LEDs (300-700mA)
Vin=36V, Vout =1-8 LEDs (1000mA) 300mVp-p max
Temperature Coefficient -40°C to +85°C ambient ±0.015%/°C max
Maximum Capacitive Load 100μF
Operating Frequency 300-1000mA 212kHz min/ 250kHz typ/ 280kHz max
Efficiency at Full Load 300-700mA 96% typ.
Vin=36V, Vout=8 LEDs (1000mA) 94% typ.
Short Circuit Protection Regulated at rated output current
Operating Temperature Range 300/350mA -40°C to +85°C
500mA -40°C to +80°C
600/700mA -40°C to +75°C
1000mA -40°C to +65°C
Storage Temperature Range -55°C to +125°C
Relative Humidity 5% to 95% RH, non-condensing
continued on next page
Specifications (typical at 25°C, nominal input voltage, rated output current unless otherwise specified )
Description
The RCD-24-xxx/PL series is a step-down constant current source designed for driving high power LEDs.
The converter uses a pinless SMD open frame design to reduce cost and size. Output currents available are
300mA, 350mA, 500mA, 600mA, 700mA and 1000mA with either Class A (Suffix /A) or Class B (suffix /B)
built-in EMC filtering. Despite its compact size, the RCD-PL series is fully featured with very high efficiency,
wide input voltage range, high ambient operating temperature and two means of LED dimming: PWM/digital
control and analogue voltage dimming. Both dimming controls are independent and can be combined. The
driver is also designed to be as reliable as the LEDs it is driving, even at the full ambient operating
temperature and is designed for strip lighting, wall washers and flourescent tube replacement designs, where
a low profile and narrow width are demanded.
Part Input Output Output Dimming Mounting
Number Range Current Voltage Control Style
(VDC) (mA) (Vmin-Vmax)
RCD-24-0.30/PL* 4.5-36V 0-300 2-35 Digital + Analogue Pinless SMD
RCD-24-0.35/PL* 4.5-36V 0-350 2-35 Digital + Analogue Pinless SMD
RCD-24-0.50/PL* 4.5-36V 0-500 2-35 Digital + Analogue Pinless SMD
RCD-24-0.60/PL* 4.5-36V 0-600 2-35 Digital + Analogue Pinless SMD
RCD-24-0.70/PL* 4.5-36V 0-700 2-35 Digital + Analogue Pinless SMD
RCD-24-1.00/PL/A 6-36V 0-1000 2-32 Digital + Analogue Pinless SMD
* /A for EMC Class A input Filter add -R for Tape and Reel Packaging e.g. RCD-24-0.35/PL/B-R
* /B for EMC Class B input Filter
Note: RCD-24-1.00/PL/A only available with Class A Filter
Output Current (mA)
700
60
20
40
100
300
Ambient Temperature (°C)
0
80
-20
-40
350
600
500
75
80
85
1000
Natural Convection
65
Constant
Current LED
Driver
EN-50121-3-2 Certified
EN-60950-1 Certified
UL-60950-1 Certified
RoHS
2011/65/EU
6/6
E358085
Refer to Application Notes
Derating-Graph
(Ambient Temperature)
www.recom-power.com L-9REV: 0/2015
Page 2
RCD-PL
1
0
PWM Digital Control Signal
Output Current (LED appears dim)
200Hz
Typ.
LIGHTLINE
DC/DC-Converter
RCD-24-PL
Series
Specifications (typical at 25°C, nominal input voltage, rated output current unless otherwise specified )
Dimensions 31.0 x 11.4 x 6.6mm
Weight 1.9g
Packing Quantity 12 pcs per Tube / 400 pcs per Reel
Reflow Soldering Profile 265°C/10 sec max
MTBF 25°C >600 khours
(using MIL HDBK 217F)
PWM Dimming and ON/OFF Control (Leave open if not used)
Remote ON/OFF DC/DC ON Open or 0V<Vr<0.6V
Threshold Voltages DC/DC OFF (Standby) 0.6<Vr<2.9V
DC/DC OFF (Full Shutdown) 2.9V<Vr<6V
Remote Pin Drive Current Vr=5V 1mA max
Quiescent Input Current in Shutdown Mode Vin=36V 200μA max
Recommended PWM Frequency For Linear Operation 200Hz
(measured 10%~90% Dimming) Maximum Frequency 1000Hz
Analogue Dimming Control (leave open if not used)
Input Voltage Range 300-1000mA -0.3V - 15V
Control Voltage Range Limits (see Graph) 300-1000mA / Full On 0.13V ± 50mV
300-700mA / Full Off 4.2V ± 150mV
1000mA / Full Off 4.35V ±100mV
Analogue Pin Drive Current 300-1000mA / Vc=5V 0.2mA max.
Environmental
Shock / Vibration EN61373
EMC Railways EN50121-3-2:2006
Conducted Emissions 300-1000mA (/A Suffix) EN55022 Class A
300-700mA (/B Suffix) EN55022 Class B
Radiated Emissions EN55022 Class B
ESD EN61000-4-2 Criterion A
Radiated Immunity EN61000-4-3 Criterion A
Fast Transient EN61000-4-4 Criterion A
Conducted Immunity EN61000-4-6 Criterion A
Analogue Dimming
Digital Dimming
Output Current (LED appears bright)
PWM Digital Control Signal
1
0
200Hz
Typ.
Typical Characteristics
Efficiency (%)
100
20
10
Output Voltage (V)
50
30
0
Vin = 24V, Iout = 300~1000mA
Efficiency (%)
100
20
10
Output Voltage (V)
50
30
0
Vin = 32V, Iout = 300~1000mA
Voltage Control (0-15V max)
Output Current
100%
0%
1V 2V 3V 4V
0.13V
Analogue Input Voltage
10V
300-700mA
4.2V
1000mA
4.35V
Note:
1. All LED Drivers may not be used without a load. They must be switched on the primary side only.
Noncompliance may damage the LED or reduce its lifetime.
2. It is not possible to parallel the drivers to increase the current.
L-10 www.recom-power.comREV: 0/2015
Page 3
RCD-PL
LIGHTLINE
DC/DC-Converter
RCD-24-PL
Series
Package Style and Pinning
XX.X ± 0.5 mm
XX.XX ± 0.25 mm
Pad Connections RCD-24-PL Series
Pad # Out Comments
1 +Vin DC Supply
2 Analogue Dimming Leave open if not used
3 PWM/ON/OFF Leave open if not used
4 GND Do not connect to -Vout
5 -Vout LED Cathode Connection
6 +Vout LED Anode Connection
Bottom View
PCB Layout Top View
6
5
1
3
2
4
Class A Version
Class A (1.00A-Version)
Class B Version
2.54
2 x 2.5 SMT Pad x 6
6.6
2.54
25.4
31.00
11.4
7.6
1.9
1mm half Via x 6
6.6
9.0
www.recom-power.com L-11REV: 0/2015
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit
written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
Page 4
1200
300
1000
Ambient Temperature Range (°C)
Output Current (mA)
-40 0 20 40 50 80 100
350
500
700
80
50
75
Natural Convection
60
60
RCD-48
RCD-48
LIGHTLINE
DC/DC-Converter
with 5 year Warranty
Constant
Current
Buck LED
Driver
Selection Guide
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
Input Voltage Range 5V typ. / 10V max.
Threshold Voltage Device ON 0.5V max.
Device OFF 2.0V min.
PWM Frequency For Linear Operation 200Hz max.
Frequency Limit 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 analogue dimming function.
Analogue Pin Drive Current Vc=5V 0.2mA max.
Vref Version Vref Voltage 4.95V
Vref Output Current 0.5mA
Vref Output Short Circuit Current 2mA typ.
Ambient Temperature 350mA -40°C to +80°C
(free air convection) 500mA -40°C to +80°C
700mA -40°C to +75°C
1000mA -40°C to +60°C
1200mA -40°C to +50°C
Analogue and PWM Dimming Control Note: Leave open if not used - do not tie to +Vin continued on next page
Specifications (typical at 25°C, nominal input voltage, rated output current unless otherwise specified)
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).
● 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
Features
LED DRIVER
Part Input Output Output Dimming Efficiency
Number Range Current Voltage Control Typ.
(VDC) (mA) (VDC) (%)
RCD-48-0.35* 9-60 0-350 2-56 Digital + Analogue 96
RCD-48-0.50* 9-60 0-500 2-56 Digital + Analogue 96
RCD-48-0.70* 9-60 0-700 2-56 Digital + Analogue 96
RCD-48-1.00* 9-60 0-1000 2-56 Digital + Analogue 96
RCD-48-1.20/M 9-60 0-1200 2-56 Digital + Analogue 96
*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.
EN-50121-3-2 Certified
EN-60950-1 Certified
UL-60950-1 Certified
E224736
RoHS
2011/65/EU
6/6
Refer to Application Notes
Derating-Graph
(Ambient Temperature)
L-12 www.recom-power.comREV: 0/2015
Page 5
0.60
27.94
0.50
11.10
16.65
4.10
Bottom View
5
4
3
2
1
6
7
4x2.54
10.16
2.54
2.54
1.00+0.15/-0
32.60
10.16
Top View
5
15
Tc
RCD-48
RCD-48
Series
Specifications (typical at 25°C, nominal input voltage, rated output current unless otherwise specified
Package Style and Pinning
Unit: mm
Tolerance:
XX.X ± 0.5 mm
XX.XX ± 0.25 mm
Pin Connections RCD-48-x.xx
Pin# Function Comments
1 +Vin DC Supply
2 GND Do not connect to -Vout
3 Vref Vref Voltage 5V typ.
4 PWM/ON/OFF Leave open if not used
5 Analogue Dimming Leave open if not used
6 -Vout LED Cathode Connection
7 +Vout LED Anode Connection
Storage Temperature -55°C to +125°C
Case Thermal Impedance 10°C/W typ.
Soldering Temperature 265°C / 10sec. max.
Relative Humidity 95% RH
Input Filter Capacitor only
Short Circuit Protection Continuous, Auto Recovery
Case Material Non Conductive Black Plastic
Metal Case
Potting Material Silicone Potting Material (UL94V-0)
Case Dimensions Plastic Case 32.6 x 16.65 x 11.10 mm
Metal Case 32.6 x 16.0 x 11.2 mm
Package Weight Pinned (Plastic Case) 13g
Wired (Plastic Case) 16g
Pinned (Metal Case) 16g
Packing Quantity Pinned (Plastic/Metal Case) 29 pcs.
Wired (Plastic Case) 12 pcs.
MTBF (using MIL-HDBK217F) +25°C 1700 x 10³ hours
(Nominal Vin at Full Load) Note: Detailed Information see Application Notes chapter “MTBF“
Safety Shock / Vibration EN61373
EMC RAILWAYS EN50121-3-2:2006
Conducted EN55011
Radiated EN55011
ESD EN61000-4-2
Radiated Immunity EN61000-4-3
Fast Transient EN61000-4-4
Surge EN61000-4-5
Conducted Immunity EN61000-4-6
Through Hole Case (Plastic)
LIGHTLINE
DC/DC-Converter
Available Operating Area
60
40
20
10
30
50
70
10 20 30 40 50 60 70
Output Voltage (V)
Input Voltage (V)
Safe Operating Area
Through Hole Case (Metal)
0.60
27.94
0.60
11.20
16.00
4.10
Bottom View
5
4
3
2
1
6
7
4x2.54
10.16
2.54
2.54
1.00+0.15/-0
32.60
10.16
Note:
1All LED Drivers may not be used without a load.
They must be switched on the primary side only.
Noncompliance may damage the LED or reduce
its lifetime.
www.recom-power.com L-13REV: 0/2015
Page 6
RCD-48
RCD-48
Series
LIGHTLINE
DC/DC-Converter
Package Style and Pinning
EMI Filter Suggestions
Wire Connections RCD-48-x.xx/W
Pin# Function Wire color
1 +Vin Red
2 GND Black
3 Vref Yellow
4 PWM/ON/OFF Blue
5 Analogue Dimming Green
6 LED- Brown
7 LED+ Yellow
Wires: UL/CSA approved (22AWG/300V)
Wired Version (Plastic)
(Yellow) 7
(Brown) 6
2 (Black)
1 (Red)
3
4
5
27.94
32.60
Bottom View
10.16
16.56
11.10 93.0 3
10.0
1.60
0.75
Unit: mm
Tolerance:
XX.X ± 1.0 mm
XX.XX ± 0.25 mm
RCD-48
Class B
DC
IN
C1 C2
C3
C6
C5
C7
C8
C9
LOAD
1
2
PWM4Analog
5
6
7
C4
Vref
3
Vin
LED+
LED-
+
-
Top Layer
L1
C1
C4
C5
LED+
LED-
C9
C3
Bottom Layer
C2
C7
C8
5
4
3
2
1
6
7
Filter Suggestion
L1 1mH (e.g. WE744272102)
C1 10μF
C2 1μF
C3 100nF close to Pins
C4 - C9 10nF
L-14 www.recom-power.comREV: 0/2015
Page 7
OFF
OFF
OFF
ON
ONON
200Hz
H
L
Max
0
PWM
Io
RCD-48
AC/DC
Constant
Voltage
RCD-48-0.35
+
_
96% Efficiency
RCD-48-0.50 RCD-48-0.70/W
+
_
Vref
An.
Pot.
+
_
+
_
LED1 LED2 LED1 ---- LED15
LED
ARRAY
48VDC Bus
96% Efficiency
96% Efficiency
95% Efficiency
Standard Application
Single String Application
PWM Dimming Controlled
0
1.0
2.0
3.0
4.0
5.0
050
100
ON
Analog Voltage
Output Current (%)
Analog Voltage (V)
Lighting/Backlighting Wall Application
High Efficiency Lighting
Dimming Controlled by Analog Voltage
RCD-48-x.xx
Last
LED
First
LED
Vin
GND
Analogue
PWM ON/OFF
LED-
LED+
Vref
RCD-48-x.xx
Last
LED
First
LED
Vin
GND
Analogue
Vref
LED-
LED+
I2I1
LED1
LED2
PWM ON/OFF
LIGHTLINE
DC/DC-Converter
RCD-48
Series
Note:
It is not possible to parallel the drivers to increase the current.
www.recom-power.com L-15REV: 0/2015
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit
written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
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