RCDE-48 Datasheet

_T_|—_
Constant
Current
Buck
LED Driver
RCDE-48
DC/DC Converter
www.recom-power.com REV.: 0/2020 L-1
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Description
The RCDE-48 series is a step-down constant current source designed for driving high power LED
applications from 12V, 24V or 48V nominal input voltages. 350, 700 or 1050mA output currents are
available as standard. The input voltage range is from 6V up to 60VDC with UVLO. These high efficiency
buck drivers have digital PWM and/or analog voltage dimming control which is capable of being
controlled by 3.3V logic. The dimming input can also be used as an CTRL pin. Typical application is a
48V powered lighting solution for up to 15 high brightness LEDs in series.
Features
dimmable
LED
Driver
• Low cost buck LED driver
• 6-60V input
• Constant current output (350, 700 or 1050mA)
• Digital PWM and analog voltage dimming
• High efficiency up to 97%
• No internal E-Caps
• RoHS2 conform
Selection Guide
Part Input Output Output Efficiency Dimming
Number Voltage Range Voltage Range Current typ. (1) Control
[VDC] [VDC] [mA] [%]
RCDE-48-0.35 6-60 3-52 0-350 97 Analog and PWM
RCDE-48-0.70 6-60 3-52 0-700 97 Analog and PWM
RCDE-48-1.05 6-60 3-52 0-1050 97 Analog and PWM
Model Numbering
Output Currentnom. Input Voltage
RCDE-48-
R
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C
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M
C
O
N
V
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T
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R
S
C
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M
P
L
I
A
N
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D
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C
T
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RoHS
RoHS
2
2
+
+
compliant
compliant
10 from 10
10 from 10
R
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O
M
C
O
N
V
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S
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P
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N
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REACH
REACH
compliant
compliant
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.
Ordering Examples
RCDE-48-0.70 6-60 Vin 3-52Vout 0-700mA Analog and PWM Dimming
Notes:
Note1: Efficiency is tested at nominal input and 15 LEDs (15 x VF 3VDC = 45VDC) at +25°C ambient
Elliciency [Wu] Elliciency [Wu]
www.recom-power.com REV.: 0/2020 L-2
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
BASIC CHARACTERISTICS
Parameter Condition Min. Typ. Max.
Internal Input Filter capacitor
Input Voltage Range nom Vin= 48VDC 6VDC 48VDC 60VDC
Under Voltage Lockout (UVLO) nom. Vin= 48VDC DC-DC ON
DC-DC OFF
5.6VDC
5.3VDC
Standby Current nom. Vin= 48VDC DC-DC OFF 5mA
Internal Operating Frequency 210kHz 550kHz
Output Ripple Current 20MHz BW
RCDE-48-0.35
RCDE-48-0.70
RCDE-48-1.05
100mAp-p
200mAp-p
320mAp-p
Output Ripple Noise 20MHz BW
RCDE-48-0.35
RCDE-48-0.70
RCDE-48-1.05
200mVp-p
300mVp-p
400mVp-p
Reflected Back Ripple Current 50mAp-p
Dropout Voltage refer to “DROPOUT VOLTAGE”
for detailed information
RCDE-48-0.35
RCDE-48-0.70
RCDE-48-1.05
1VDC
1.5VDC
2VDC
3VDC
continued on next page
Efficiency vs. Load
RCDE-48-0.35
RCDE-48-0.70 Efficiency vs. Load
Dropout Voltage vs. Load
Dropout Voltage vs. Load
Output Load [Number of Diodes]
3.0
2.0
1.0
2.5
1.5
0.5
0
Dropout Voltage [VDC]
2 3 4 5 7 8 10 12
15
6 9 11 13 14
Output Load [Number of Diodes]
3.0
2.0
1.0
2.5
1.5
0.5
0
Dropout Voltage [VDC]
2 3 4 5 7 8 10 12
15
6 9 11 13 14
0 1 2 3 4 5 7 8 10 12 156 9 11 13 14
Output Load [Number of Diodes]
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
0 1 2 3 4 5 7 8 10 12 156 9 11 13 14
Output Load [Number of Diodes]
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
www.recom-power.com REV.: 0/2020 L-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
DROPOUT VOLTAGE
REGULATIONS
Parameter Condition Value
Output Current Accuracy ±7.0% max.
Output Current Stability ±2.0% typ.
Deviation vs. Load RCDE-48-0.35
7
3.5
0
-3.5
5.25
1.75
-1.75
-5.25
-7
Deviation [%]
0 1 2 3 4 5 6 8 107 9 12
11 1513 14
Output Load [Number of Diodes]
Efficiency vs. Load Dropout Voltage vs. Load
Output Load [Number of Diodes]
3.0
2.0
1.0
2.5
1.5
0.5
0
Dropout Voltage [VDC]
2 3 4 5 7 8 10 12
15
6 9 11 13 14
0 1 2 3 4 5 7 8 10 12 156 9 11 13 14
Output Load [Number of Diodes]
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
RCDE-48-1.05
Dropout voltage is the smallest difference between a regulators input and its
output voltage, which is required to maintain regulation and enable the regulator
to provide rated output voltage or current.
LED++V
in
LED--V
in
Vin Vout
Vdropout
RCDE-48-xx
Vout max. = Vin - Vdropout
Vin min. = nLED x VF max. + Vdropout
Vin min. =11 x 3 + 3
Vin min. = 36VDC
Example:
Vin = input voltage
Vout = output voltage
Vdropout = dropout voltage
nLED = number of LEDs
VF max. = forward voltage
Vdropout = 3VDC max.
nLED = 11 LEDs
VF max. = 3VDC
REEDM TE SEED 52:5
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DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
ANALOG DIMMING CONTROL (leave open if not used - do not tie to +Vin)
Parameter Condition Value
Input Voltage Limits low line, DC-DC OFF
high line, DC-DC ON
0VDC to 0.3VDC
3VDC to 12VDC
Control Voltage Range 20% to 100% 0.3VDC to 2.5VDC
Pin Drive Current Analog Vc= 5VDC 1mA max.
Deviation vs. Load
RCDE-48-0.70 RCDE-48-1.05
7
3.5
0
-3.5
5.25
1.75
-1.75
-5.25
-7
Deviation [%]
0 1 2 3 4 5 6 8 107 9 12
11 1513 14
Output Load [Number of Diodes]
Output Current [%]
Analogue Dimming Control [VDC]
0 0.3 0.9 1.5 2.10.6 1.2 1.8 2.4 2.5
100
80
60
40
90
70
50
30
20
10
0
7
3.5
0
-3.5
5.25
1.75
-1.75
-5.25
-7
Deviation [%]
0 1 2 3 4 5 6 8 107 9 12
11 1513 14
Output Load [Number of Diodes]
Analog Dimming
Analog Dimming Application 1-10VDC
LED++V
in
Dim/CTRL
LED--V
in
DLEDn
DLED1
+Vin
VDim
RCDE-48-xx
R1
R2
GNDGND
VDim R1R2
1 - 10VDC 20kΩ10kΩ
REEDM g 22:5 555 E 22.5 525
www.recom-power.com REV.: 0/2020 L-5
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
PWM DIMMING AND ON/OFF CTRL (leave open if not used - do not tie to +Vin)
Parameter Condition Value
Input Voltage Limits low line, DC-DC OFF
high line, DC-DC ON
0VDC to 0.3VDC
3VDC to 12VDC
Dimming Voltage Range 0% to 100% 0% - 100%, duty cycle
Pin Drive Current ON/OFF CTRL Vc= 5VDC 1mA max.
PWM Frequency for linear operation
frequency limit
200Hz - 1kHz
10kHz max.
PWM Dimming
Output Current [%]
PWM Dimming [%]
0
100
80
60
40
90
70
50
30
20
10
0
10 20 30 40 50 60 70 80 90 100
200Hz
1kHz
10kHz
Output Current [%]
PWM Dimming [%]
0
6
4
5
3
2
1
0
12345
200Hz
1kHz
10kHz
PROTECTIONS
Parameter Type Value
Over Temperature Protection (OTP) case temperature 115°C typ., ±10°C
ENVIRONMENTAL
Parameter Condition
Value
Operating Temperature Range @ natural convection 0.1m/s refer to “Derating Graph”
Maximum Case Temperature 105°C
Temperature Coefficient 0.06%/K typ.
Thermal Impedance 32K/W
Operating Altitude 5000m
Operating Humidity non-condensing 95% RH
MTBF according to MIL-HDBK-
217F, G.B.
+25°C
+40°C
1830 x 10³ hours
1730 x 10³ hours
continued on next page
REEDM 2.5 EELS «=35 3.5 .5:an 55:9 "(EH E259 55:9
www.recom-power.com REV.: 0/2020 L-6
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
SAFETY AND CERTIFICATIONS
Certificate Type (Safety) Report Number Standard
RoHS2+ RoHS 2011/65/EU + AM2015/863
Condition
Standard / Criterion
Limits and Methods of Measurement of Radio Disturbance Characteristics
of Electrical Lighting and Similar Equipment
with external filter EN55015
-40 -20 0 20 40 7060-30 -10 10 30 50
55
80 90 100
1050
400
600
500
800
700
900
300
200
100
0
Output Current [mA]
Ambient Temperature [°C]
Derating Graph
(@ Chamber and natural convection 0.1m/s)
RCDE-48-1.05
-40 -20 0 20 40 7060-30 -10 10 30 50 80 90 100
400
200
250
300
350
150
100
50
0
Output Current [mA]
Ambient Temperature [°C]
-40 -20 0 20 40 7060-30 -10 10 30 50 80 90 100
800
400
500
600
700
300
200
100
0
Output Current [mA]
Ambient Temperature [°C]
RCDE-48-0.35 RCDE-48-0.70
L—J
www.recom-power.com REV.: 0/2020 L-7
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin and 15 LEDs (15*3V=45V) unless otherwise stated)
RCDE-48
Series
DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter Type Value
Material
case, baseplate
potting
PCB
non-conductive black plastic, (UL94 V-0)
silicone, (UL94 V-0)
FR4, (UL94 V-0)
Dimension (LxWxH) 32.1 x 20.6 x 12.3mm
Weight 16.0g typ.
20.6
8.0
10.5
12.3
0.75
3.86
32.1
31.5 20.0
2.54
Bottom View
1
1
11
1114
14
12
1213
13
2
224
24
22
22
23
23
15.24
2.21
0.60+0.10/-0.05
12.00
1.95
Top View
2.54
tc
Dimension Drawing (mm)
Recommended Footprint Details
Pin Connections
# Function Description
1, 2 -Vin -DC supply
11, 12 LED- LED cathode connection
13, 14 LED+ LED anode connection
22 Dim/CTRL leave open if not used
23, 24 +Vin +DC supply
tc= case temperature measuring point
Tolerance: xx.x= ±0.5mm
xx.xx= ±0.25mm
PACKAGING INFORMATION
Parameter Type
Value
Packaging Dimension (LxWxH) tube 512.9 x 22.2 x 20.9mm
Packaging Quantity 14pcs
Storage Temperature Range -55°C to +125°C
Storage Humidity non-condensing 95% RH max.
INSTALLATION AND APPLICATION
The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer.
The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or
cause
loss of life, inflict bodily harm or damage property. The applicant 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.
Connection
LED++V
in
Dim/CTRL
LED--V
in
DLEDn
DLED1
-Vin
+Vin
SW1
SW2
VDim
RCDE-48-xx
Notes:
Note2: Do not connect LED+ with +Vin and LED- with -Vin