Features Regulated Converters Rev.1 INNOLINE Constant Current Output Power LED Driver Wide Input Voltage Range PWM/Digital Dimming and Analogue Voltage Dimming Short Circuit Protected 96% Efficiency DC/DC-Converter RCD-24 Series 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 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 of 85C. Selection Guide Part Number Input Range (VDC) Output Current (mA) Output Voltage (V) Dimming Control Efficiency max. (%) RCD-24-0.30 4.5-36V 0-300 2-32 Digital + Analogue 96 RCD-24-0.35 4.5-36V 0-350 2-32 Digital + Analogue 96 RCD-24-0.50 4.5-36V 0-500 2-32 Digital + Analogue 96 RCD-24-0.60 4.5-36V 0-600 2-32 Digital + Analogue 96 RCD-24-0.70 4.5-36V 0-700 2-32 Digital + Analogue 96 Constant Current Single Output Specifications ( typical at 25C, nominal input voltage, rated output current unless otherwise specified ) Input Voltage (absolute maximum) 36VDC max. Recommended Input Voltage 5V min. / 24V typ. / 36VDC max. Input Filter Capacitor Output Voltage Range Vin=36V 2V min. / 32V max. Output Current Range Vin - Vout >1.5~4V Output Current Accuracy 300mA-700mA 300mA-700mA 2% typ. Internal Power Dissipation Load of 5 LEDs Output Current Stability Vin=36V, Vout =2~32V 700mW Output Ripple and Noise (20MHz limited) Vin=36V, Vout =2~32V Temperature Coefficient -40~+85C ambient 1% max 120mVp-p max 0.015%/C max. Maximum Capacitive Load 100F Efficiency at Full Load Short Circuit Protection Operating Temperature Range (free air convection) 96% max. Regulated at rated output current 300mA/350mA -40C to +85C 500mA -40C to +80C 600mA -40C to +75C 700mA -40C to +71C Storage Temperature Range -55C to +125C Maximum Case Temperature 100C Thermal Impedance Case Material Natural Convection 55C/Watt Non Conductive Black Plastic Potting Material Dimensions Epoxy (UL94-V0) 22.1 x 12.6 x 8.5mm Weight Wave Soldering Profile Derating Graph 210 kHz min/ 260kHz typ./ 300kHz max 4.5g Max. 265C/10 sec. (Ambient Temperature) RCD-24-0.35/0.70 700 Output Current (mA) Operating Frequency 71 600 75 500 80 350 300 Natural Convection 85 -40 -20 0 20 40 60 80 100 Ambient Temperature (C) continued on next page www.recom-international.com 2008 137 RCD-24 Series INNOLINE DC/DC-Converter Specifications -Continued PWM Dimming and ON/OFF Control (Leave open if not used) Vin = 24V, Iout = 300-700mA DC/DC ON Open or 0V<Vr<0.6V DC/DC OFF (Standby) 0.6<Vr<2.9V DC/DC OFF (Shutdown) 2.9V<Vr<6V Remote Pin Drive Current Vr=5V Quiescent Input Current in Shutdown Mode Vin=36V, Vr>2.9V 100 1mA max. 50 200A max. Maximum PWM Frequency for Linear Operation (measured 10%~90% Dimming) Efficiency (%) Remote ON/OFF 200Hz Analogue Dimming Control (leave open if not used) Input Voltage Range 0 - 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. 0 10 20 30 Output Voltage (V) Vin = 32V, Iout = 300-700mA Environmental 100 (all series, see note) (all series except 700mA) (all series) (all series) (all series) (all series) 5% to 95% RH, non-condensing EN55022 Class B EN55022 Class B EN61000-4-2 Class A EN61000-4-3 Class A EN61000-4-4 Class A EN61000-4-6 Class A MTBF (RCD-24-0.70, Nominal Vin, Full Load) +25C 605 x 10 hours using MIL-HDBK 217F +71C 516 x 10 hours 50 Efficiency (%) Relative Humidity Conducted Emissions Radiated Emissions ESD Radiated Immunity Fast Transient Conducted Immunity 0 10 20 30 Output Voltage (V) Note: Requires an input filter to meet EN55022 ClassB conducted emissions, see below. Class B Filter Suggestion +Vin 47H (not dimmed) or 120H (dimmed) 1 2.5F Elect. +LED RCD-24-xxx LED Driver 10nF Cer. -Vin 6 4 2 5 -LED 10nF, Cer. (only if Analogue Dimming is not used) 10nF, Cer. (only if Analogue Dimming is used) 138 C1 or C2 2008 www.recom-electronic.com RCD-24 Series INNOLINE DC/DC-Converter Analogue Dimming Control and Application Circuit Examples 100% LED DRIVER with 0-10V Interface Analogue Input Voltage Output Current +Vin RCD-24-xxx GND Analogue Dim 0-10VDC 0% 0.13V 1V 2V 3V 4V 4.5V 15V 1st LED 2k4 3k3 Last LED On/Off (Optional) Voltage Control (0-15V max) LED DIMMER for up to 7 white LEDs 24VDC RCD-24-xxx GND 4k7 1st LED Manual 1K Pot. Dimming Control Last LED Digital Dimming Control PWM Digital Control Signal PWM Digital Control Signal 1 1 0 0 Output Current Output Current (LED appears dim) PWM Digital Control Signal 1 0~ 200Hz 0 0~ 200Hz Output Current (LED appears bright) Max* 0 * Max output current can also be set using Analogue input www.recom-international.com 2008 139 RCD-24 Series INNOLINE DC/DC-Converter Package Style and Pinning Through Hole Case Style 3rd angle projection 22.10 12.55 8.50 Pin Connections Pin # Out Comments 1 +Vin DC Supply 2 Analogue Dimming 3 PWM/ON/OFF Leave open if not used Recommended Footprint Details 4 GND Do not connect to -Vout 1.00 o+0.15/0 5 -Vout LED Cathode Connection 6 +Vout LED Anode Connection 4.1 0.6 7.62 17.5 Leave 1 mm space arround case on pcb RCD-24 Series 5 4 3 Bottom View 2 6 1 Leave open if not used XX.X 0.5 mm XX.XX 0.25 mm Pin Tolerance 0.1 mm 2.54 Top View 2.54 Standard Application Circuits LED DRIVER +Vin RCD-24-xxx GND 1st LED Analogue Dim Last LED PWM Dim/ On/Off MULTIPLE LED DRIVER (up to 20 LEDS) +Vin RCD-24-0.70 0.5~1.0 Ohm GND 1st LED Analogue Dim PWM Dim/ On/Off Last LED Driving Two Strings of 350mA LEDs with one 700mA Driver. 140 2008 www.recom-electronic.com