● Constant Current Output
● Power LED Driver
● Wide Input Voltage Range
● PWM/Digital Dimming and Analogue
Voltage Dimming
INNOLINE
Features
DC/DC-Converter
Regulated
Converters
RCD-24
Series
● Short Circuit Protected
● 96% Efficiency
Rev.1
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 and 700mA 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 inde-
pendent 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 of 85°C.
Constant
Current
Selection Guide
Single Output
Part
Number
Input
Range
(VDC)
Output
Current
(mA)
Output
Voltage
(V)
Dimming
Control
Efficiency
max.
(%)
RCD-24-0.30
RCD-24-0.35
RCD-24-0.50
RCD-24-0.60
RCD-24-0.70
4.5-36V
4.5-36V
4.5-36V
4.5-36V
4.5-36V
0-300
0-350
0-500
0-600
0-700
2-32
2-32
2-32
2-32
2-32
Digital + Analogue
Digital + Analogue
Digital + Analogue
Digital + Analogue
Digital + Analogue
96
96
96
96
96
Specifications
( typical at 25°C, nominal input voltage, rated output current unless otherwise specified )
Input Voltage (absolute maximum)
Recommended Input Voltage
Input Filter
36VDC max.
5V min. / 24V typ. / 36VDC max.
Capacitor
Output Voltage Range
Vin=36V
2V min. / 32V max.
Output Current Range
Vin - Vout >1.5~4V
300mA-700mA
300mA-700mA
2% typ.
Output Current Accuracy
Internal Power Dissipation
Output Current Stability
Output Ripple and Noise (20MHz limited)
Temperature Coefficient
Maximum Capacitive Load
Operating Frequency
Load of 5 LEDs
700mW
Vin=36V, Vout =2~32V
Vin=36V, Vout =2~32V
-40~+85°C ambient
1% max
120mVp-p max
0.015%/°C max.
100μF
Derating Graph
(Ambient Temperature)
RCD-24-0.35/0.70
210 kHz min/ 260kHz typ./ 300kHz max
96% max.
Efficiency at Full Load
Short Circuit Protection
Operating Temperature Range
(free air convection)
Regulated at rated output current
300mA/350mA
-40°C to +85°C
-40°C to +80°C
-40°C to +75°C
-40°C to +71°C
500mA
600mA
700mA
700
600
500
71
75
Storage Temperature Range
Maximum Case Temperature
Thermal Impedance
Case Material
-55°C to +125°C
100°C
Natural Convection
55°C/Watt
80
Non Conductive Black Plastic
Epoxy (UL94-V0)
350
300
Potting Material
85
Natural Convection
Dimensions
22.1 x 12.6 x 8.5mm
4.5g
-40
0
20 40
-20
60 80 100
Weight
Ambient Temperature (°C)
Wave Soldering Profile
Max. 265°C/10 sec.
continued on next page
www.recom-international.com
2008
137