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INNOLINE
DC/DC-Converter
RCD-24
EN-60950-1 Certified
UL-60950-1 Certified
Constant
Current LED
Driver
●UL Certified Constant Current LED Driver
●Wide Input and Output Voltage Range
●Digital PWM and Analogue Voltage Dimming
●Short Circuit and Overtemperature Protected
●Pin, Wire or Open Frame SMD Versions
●IP67 rated for /W Version
●96% Efficiency
Features
Regulated
Converters
Selection Guide
Input Voltage (absolute maximum) 40VDC max
Recommended Input Voltage 300mA-700mA 5V min. / 24V typ. / 36VDC max
1A-1.2A 6V min. / 24V typ. / 36VDC max
Input Filter Capacitor
Output Current Accuracy 300mA-700mA ±1% typ, ±3% max.
(Vin = 24DC) 1A-1.2A ±2% typ, ±5% max.
Internal Power Dissipation Worst case load of 5 LEDs 800mW max
Output Current Stability Vin=36V, Vout =1-9 LEDs ±1% max
Output Ripple and Noise (20MHz BW) 300mA-700mA 120mVp-p max
Vin=36V, Vout =1-9 LEDs 1A-1.2A 200mVp-p max
Temperature Coefficient -40°C~+85°C ambient ±0.015%/°C max
Maximum Capacitive Load 100μF
Operating Frequency 300mA-700mA 210kHz min/ 260kHz typ/ 300kHz max
1A-1.2A 350kHz min/ 450kHz typ/ 550kHz max
Efficiency at Full Load 96% max.
Short Circuit Protection Regulated at rated output current
continued on next page
Specifications
( typical at 25°C, nominal input voltage, rated output current unless otherwise specified )
Description
The RCD series is a step-down constant current source designed for driving high power white LEDs. Standard
output currents available are 300mA, 350mA, 500mA, 600mA, 700mA, 1A and 1.2A to make this driver
compatible with a wide range of LEDs from many different manufacturers without the need for any external
components. Despite its compact size, the RCD 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 operating temperature.
Options include an IP67 wired version (/W) and an open frame version with SMD pins (/SMD Option).
Part Input Output Output Dimming Mounting
Number Range Current Voltage Control Style
(VDC) (mA) (Vmin-Vmax)
RCD-24-0.30** 4.5-36V 0-300 2-35 Digital + Analogue SMD, Pins or Wired
RCD-24-0.35** 4.5-36V 0-350 2-35 Digital + Analogue SMD, Pins or Wired
RCD-24-0.50** 4.5-36V 0-500 2-35 Digital + Analogue SMD, Pins or Wired
RCD-24-0.60** 4.5-36V 0-600 2-35 Digital + Analogue SMD, Pins or Wired
RCD-24-0.70** 4.5-36V 0-700 2-35 Digital + Analogue SMD, Pins or Wired
RRCD-24-1.00** 6-36V 0-1000 3-33 Digital + Analogue Pins or Wired
RCD-24-1.20** 6-36V 0-1200 3-33 Digital + Analogue Pins or Wired
** No suffix is standard with PCB Pins.
** Add suffix /SMD/OF for open frame version with SMD solderpins (300mA ~ 700mA versions only)
** Add suffix /W for standard wired version without dimming control (four wires)
** Add suffix /W/X1 for wired version with analogue dimming control (five wires)
** Add suffix /W/X2 for wired version with PWM dimming control (five wires)
** Add suffix /W/X3 for wired version with both analogue and PWM dimming controls (six wires)
Derating Graph
(Ambient Temperature)
Output Current (mA)
700
60
20 40 100
300
Ambient Temperature (°C)
080
-20
-40
Natural Convection
350
600
500
71
75
80
85
1000
1200
800
900
1100
65
Refer to Application Notes
RoHS
2002/95/EC
6/6
E224736
RCD-24
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Voltage Control (0-15V max)
Output Current
100%
0%
1V 2V 3V 4V 15V
0.13V 4.5V
Analogue Input Voltage
10V
1
0
PWM Digital Control Signal
Output Current (LED appears dim)
50~
200Hz
Typ.
INNOLINE
DC/DC-Converter
RCD-24
Series
Specifications -Continued
Operating Temperature Range 300mA-350mA -40°C to +85°C
(free air convection) 500mA -40°C to +80°C
600mA -40°C to +75°C
700mA-1A -40°C to +71°C
1.2A -40°C to +65°C
Storage Temperature Range -55°C to +125°C
Overtemperature Shutdown Internal IC Temperature 150°C typ.
(Auto-restart after cool down) Temperature Hysteresis 20°C typ.
Maximum Case Temperature 100°C
Thermal Impedance Natural Convection 55°C/Watt
Case Material (Pinned or Wired Versions) Non Conductive Black Plastic
Potting Material (Pinned or Wired Versions) Epoxy (UL94-V0)
Dimensions Pinned or Wired Versions 22.1 x 12.6 x 8.5mm
SMD 21.0 x 11.4 x 10mm
Weight Pinned or Wired Versions 4.5g
SMD 1.9g
Soldering Profile Pinned or Wired Versions 265°C/10 sec. max
SMD 245°C/30 sec. max
Packing Quantities Pinned Versions 39pcs per Tube
SMD Versions 32pcs per Tube
(Refer to App Notes for Tube sizes) Wired Versions 5pcs per Bag
PWM Dimming and ON/OFF Control (Leave open if not used)
Remote ON/OFF DC/DC ON 300mA-700mA Open or 0V<Vr<0.6V
Threshold Voltages 1A-1.2A Open or 0V<Vr<0.8V
DC/DC OFF (Standby) 300mA-700mA 0.6<Vr<2.9V
1A-1.2A 1.4<Vr<2.2V
DC/DC OFF (Shutdown) 300mA-700mA 2.9V<Vr<6V
1A-1.2A 2.2V<Vr<15V
Remote Pin Drive Current Vr=5V 1mA max
Quiescent Input Current in Shutdown Mode Vin=36V 200μA max
Maximum PWM Frequency For Linear Operation 20 -200Hz
(measured 10%~90% Dimming) Maximum Frequency 2000Hz
Analogue Dimming Control (leave open if not used)
Input Voltage Range -0.3V - 15V
Control Voltage Range Limits Full On 0.13V ± 50mV
(see Graph) Full Off 4.5V ± 50mV
Analogue Pin Drive Current Vc=5V 0.2mA max.
Environmental
Relative Humidity 5% to 95% RH, non-condensing
/W Versions IP67
Conducted Emissions (all series, see note) EN55022 Class B
Radiated Emissions (all series except 700mA) EN55022 Class B
ESD (all series) EN61000-4-2 Class A
Radiated Immunity (all series) EN61000-4-3 Class A
Fast Transient (all series) EN61000-4-4 Class A
Conducted Immunity (all series) EN61000-4-6 Class A
MTBF (RCD-24-0.70, Nominal Vin, Full Load) +25°C 605 x 10³ hours
using MIL-HDBK 217F +71°C 516 x 10³ hours
Note: Requires an input filter to meet EN55022 ClassB conducted emissions - see next page
Analogue Dimming
Digital Dimming
Output Current (LED appears bright)
PWM Digital Control Signal
1
050~
200Hz
Typ.
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RCD-24
INNOLINE
DC/DC-Converter
RCD-24
Series
Recommended PCB Layout
for Pinned / SMD Versions
Class B Filter Suggestion
RCD-24-xxx
LED Driver
C1 =
2.2µF
Elect.
Low ESR
-Vin -LED
+LED
45
6
+Vin
L1
1
C2
2
C3
3
C4
C5
C6
C7
C8
C2*
RCD-24-0.30 - RCD-24-0.70
No dimming or PWM dimming only:
L1 = 47μH
C2 = C3 = 10nF MLCC
Other caps not required
Analogue Dimming used:
L1 = 120μH
C2 = C7 = 10nF MLCC
Other caps not required
RCD-24-1.00 - RCD-24-1.20
L1 = 220μH
C2 = 10nF MLCC
C3 = C5 = 2.2nF MLCC
C4 = C6 = C7 = C8 = 100nF MLCC
C2* = optional 2μ2 MLCC required only if L1
starts to resonate with the back ripple current.
L1
C1 C3
C5
C2
C4
C6
C8
C7 LED-
LED+
Vin+
Vin-
Pin
1
C2*
Top View
Typical Characteristics
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INNOLINE
DC/DC-Converter
RCD-24
Series
RCD-24
24VDC
Manual
Dimming
Control
RCD-24-xxx
LED DIMMER for up to 7 white LEDs
GND
1K Pot.
1st LED
Last LED
4k7
Application Examples
+Vin
Analogue
Dim
0-10VDC
RCD-24-xxx
On/Off
(Optional)
GND
3k3
2k4 1st LED
Last LED
0
1
Max*
0
PWM Digital Control Signal
Output Current
* Max output current can also be set using Analogue input
LED Temperature (°C)
Output Current
100%
0%
50 60 70 80
25 90
24VDC
RCD-24-xxx
Automatic LED Overtemperature Protection
GND
PTC
Thermistor
1st LED
Last LED
4k7
4k7
4V7
Zener
Analog
Dimming
Thermally connected
LED Temperature Monitoring
Typical Response Curve (PTC = 500 Ohm @ 70°C)
RGB Driver
RCD-24
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REV:0/2010
INNOLINE
DC/DC-Converter
RCD-24
Series
Package Style and Pinning
3rd angle
projection
Bottom View
Top View
6
1
3
2
45
2.54
2.54
1.90ø SMT Pad
6.6
3.380
2.54
17.8
21.00
1.8
1.0
11.42
7.6
1.9
Solderball
Pin after
Reflow
1.90
3.180
SMD Version
XX.X ± 0.5 mm
XX.XX ± 0.25 mm
XX.XXX ± 0.01 mm
Pin Connections RCD-24 SMD Series
Pin # 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
Due to the compact size of the Open Frame version, a product code label is used instead of the whole part number.
The product code consists of RCD xxxx (where xxxx is the datecode) followed by an 8 digit reference code, e.g.
= RCD-24-0.35/SMD/OF, manufactured in Week 1 of 2010.
The reference codes for standard parts are:
RCD-24-0.30/SMD/OF = 80999199
RCD-24-0.35/SMD/OF = 80999186
RCD-24-0.50/SMD/OF = 80999200
RCD-24-0.60/SMD/OF = 80999201
RCD-24-0.70/SMD/OF = 80999202
Other custom or semi-custom parts may have different reference codes.
RCD 1001
80999186
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text
INNOLINE
DC/DC-Converter
RCD-24
Series
Bottom View
Top View
6
1
3
2
45
Bottom View
/W Version
6
1
45
7.62
2.54
1.00 ø+0.15/0
0.6
8.50
12.55
4.1
2.54
17.5
22.10
7.6
17.5
Package Style and Pinning
3rd angle
projection
XX.X ± 0.5 mm
XX.XX ± 0.25 mm
Pin Tolerance ± 0.1 mm
Pin Connections RCD-24 Series
Pin # 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
Wire Connections RCD-24/W Series
Wire # Function Comments
1 (Red) +Vin DC Supply
4 (Black) GND Do not connect to -Vout
5 (Brown) -Vout LED Cathode Connection
6 (Yellow) +Vout LED Anode Connection
Wire length = 100mm + 10mm stripped & tinned = 110mm total
Wire outside diameter = 1.6mm
Wire core diameter = 0.75mm
Wire is UL/CSA listed/ 22AWG / 300V Rated
Wire Connections RCD-24/W/X Series
Wire # Function Comments
2 (Green) Ana Dimming /X1
3 (Blue) PWM Dimming /X2
2 + 3 (Green + Blue) Ana + PWM Dimming /X3
Wire length = 100mm + 10mm stripped & tinned = 110mm total
Wire outside diameter = 1.6mm
Wire core diameter = 0.75mm
Wire is UL/CSA listed/ 22AWG / 300V Rated
Bottom View
/W/X1 Version
6
1
45
2
Bottom View
/W/X2 Version
6
1
45
3
Bottom View
/W/X3 Version
6
1
45
3
2
7.6
17.5
7.6
17.5
7.6
17.5
Leave 1 mm space arround case on PCB
Recommended Footprint Details
Pinned and Wired Versions