R-78W3.3-0.5 RECOM POWER

C C S S O O R R E E M M T T P P R R L L I I E E A A V V N N N N T T Efficiency up to 96%, no need for heatsinks Features Build-in diode protection circuit DC/DC Converter Low profile (LxWxH= 11.5 x 8.5 x 17.5mm) Continuous short circuit protection Switching RoHS compliant Regulator IEC/EN60950 certified R-78W-0.5 Description 0.5 Amp The R-78W series offers wired 0.5A switching regulators which are ideally suited to offer a stable 3 SIP3 Wired voltage supply without the need for a PCB for applications like high power LED lighting, battery powered systems, cooling systems, or fans. Due to the high efficiencies of up to 96% there is no need for a heat sink. The compact modules feature fully protected outputs and draw only 1mA under Single Output no load conditions. Selection Guide Part Input Output Output Efficiency Max. Capacitive (1) Number Voltage Range Voltage Current min Vin Load VDC VDC A % F R-78W3.3-0.5 6.5 - 32 3.3 0.5 88 220 R-78W5.0-0.5 6.5 - 32 5.0 0.5 93 220 R-78W9.0-0.5 11 - 32 9.0 0.5 95 220 R-78W12-0.5 15 - 32 12.0 0.5 96 220 Notes: Note1: Max. Cap Load is tested at nominal input and full resistive load 6800F with <1sec start-up time 2+ RoHS REACH compliant compliant 10 from 10 Model Numbering IEC60950-1 certified EN60950-1 certified R-78W -0.5 Output Voltage Output Current Specifications (measured at Ta= 25C, full load, nominal input voltage and after warm-up) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. Input Voltage Range nom. Vin = 24VDC 6.5VDC 24VDC 32VDC Quiescent Current 5mA 7mA 0.4W Internal Power Dissipation (2) 0% Minimum Load Internal Operating Frequency 280kHz 330kHz 380kHz (3) Output Ripple and Noise 20MHz BW limited 50mVp-p 75mVp-p Notes: Note2: Operation under no load will not harm the converter, but specifications may not be met A minimum load of 6mA is recommended Note3: Measurements are made with a 100nF MLCC across output (low ESR) www.recom-power.com REV.: 4/2021 I-1 O O P P C C R R O O M M D D O O U U C C C C E E T T R R S SR-78W-0.5 DC/DC Converter Series Specifications (measured at Ta= 25C, full load, nominal input voltage and after warm-up) REGULATIONS Parameter Condition Type Value Output Accuracy all models 2% typ. / 3% max. 3.3VDC, 5VDC 0.2% typ. / 0.4% max. Line Voltage Regulation low line to high line, full load 9VDC, 12VDC 0.1% typ. / 0.2% max. 3.3VDC, 5VDC 0.4% typ. / 0.6% max. Load Voltage Regulation 10% to 100% load 9VDC, 12VDC 0.25% typ. / 0.4% max. 50% - 100% Load, Io/t 25mA/s 75mV typ. Transient Response all models 10% - 100% Load, Io/t 25mA/s 100mV max. PROTECTIONS Parameter Type Value Short Circuit Protection (SCP) continuous, automatic recovery Reverse Current Protection internal structure Controller +V +V IN OUT GND GND An internal blocking diode can prevent reverse current flow backwards into the output, as this can damage the converter when it is powered down. ENVIRONMENTAL Parameter Condition Value Operating Temperature Range with derating natural convection 0.1m/s (see graph) -40C to +85C Maximum Case Temperature +100C Temperature Coefficient -40C to +85C ambient 0.015%/C Thermal Impedance 0.1m/s, vertical 70C/W typ. Operating Altitude 2000m Operating Humidity non-condensing 95% RH max. Pollution Degree PD2 3 MTBF according to MIL-HDBK-217F, G.B. + 25C 9368 x 10 hours Derating Graph 100 90 80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 71 85 Ambient Temperature C www.recom-power.com REV.: 4/2021 I-2 Output Load %