Features • Efficiency up to 96%, no need for heatsinks! • Build-in Diode Protection Circuit • Low Profie (LxWxH= 11.5 x 8.5 x 17.5mm) • Continuous Short Circuit Protection • RoHS compliant • IEC/EN-60950 Certified Switching Regulator DC/DC Converter R-78W-0.5 Description The R-78W series offers wired 0.5A switching regulators which are ideally suited to offer a stable 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 no load conditions. 0.5 AMP SIP3 Single Output 3Y EAR 3 wa rranty Selection Guide Part Number R-78W3.3-0.5 R-78W5.0-0.5 R-78W9.0-0.5 R-78W12-0.5 Input Output Output Efficiency Max. Capacitive Voltage Range Voltage Current @ min. Vin Load (1) (VDC)(VDC) (mA) (%) (µF) 6.5 - 32 3.3 500 88 220 6.5 - 32 5.0 500 93 220 11 - 32 9.0 500 95 220 15 - 32 12.0 500 96 220 Notes: Note1: 6800µF with <1sec start-up time Specifications (measured at TA= 25°C, full load, nominal input voltage and after warm-up) BASIC CHARACTERISTICS Parameter Condition Input Voltage Range Min. Typ. 6.5VDC 24VDC Max. 32VDC 6mA Output Current (2) Quiescent Current 0% Load Switching Frequency 280kHz 500mA 5mA 7mA 330kHz 380kHz Efficiency see Selection Guide 0.4W Internal Power Dissipation 20MHz BW limited Output Ripple and Noise Notes: Note2: 50mVp-p 75mVp-p Operation under no load will not damage the device, however they may not meet all specifications. A minimum load of 6mA is recommended. IEC-60950-1 Certified EN-60950-1 Certified REGULATIONS Parameter Condition Output Voltage Accuracy Type Value all models ±2% typ. / ±3% max. Line Voltage Regulation low line to high line, full load 3.3V, 5V 9V, 12V ±0.2% typ. / ±0.4% max. ±0.1% typ. / ±0.2% max. Load Voltage Regulation 10% to 100% load 3.3V, 5V 9V, 12V ±0.4% typ. / ±0.6% max. ±0.25% typ. / ±0.4% max. 50% - 100% Load, ΔIo/Δt 25mA/µs 10% - 100% Load, ΔIo/Δt 25mA/µs all models ±75mV typ. ±100mV max. Transient Response Refer to Applications Notes www.recom-international.com REV.: 0/2015 PA-1 R-78W-0.5 DC/DC Converter Series Specifications (measured at TA= 25°C, full load, nominal input voltage and after warm-up) PROTECTIONS Parameter Type Value Short Circuit Protection (SCP) continuous, automatic recovery Reverse Current Protection: +VIN +VOUT Controlled IC -VIN -VOUT 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 -40°C to +85°C Maximum Case Temperature +100°C Storage Temperature Range -55°C to +125°C Temperature Coefficient -40°C to +85°C ambient 0.015%/°C Thermal Impedance surface of case 70°C/W typ. Humidity non-condensing 95%, RH max. 9368 x 103 hours MTBF Derating Graph Output Power (%) 100 80 60 40 20 0 -40 -20 0 10 20 30 40 50 60 70 71 Ambient Temperature (°C) 80 90 100 85 SAFETY AND CERTIFICATIONS Certificate Type Report / File Number IEC General Safety SPCLVD1407030-1 IEC-60950-1, 2nd Edition EN General Safety SPCLVD1407030-1 EN-60950-1, 3rd Edition PA-2 REV.: 0/2015 Standard www.recom-international.com R-78W-0.5 DC/DC Converter Series Specifications (measured at TA= 25°C, full load, nominal input voltage and after warm-up) DIMENSIONS and PHYSICAL CHARACTERISTICS Parameter Type Value Material Case Potting non-conductive black plastic UL94V-0, Epoxy Dimensions (LxWxH) 17.5 x 11.5 x 8.5mm Weight 4.8g typ. Packaging Dimensions (LxWxH) Cardboard Box 140 x 130 x 65mm Packaging Quantity (3) Cardboard Box 25pcs. Notes: Note3: 5 bubble packs each containing 5pcs in a cardboard box. Mechanical Dimensions (mm) 11.5 17.5 R-78W -xx0.5 10.0 ±2 105.0 ±5 xxxx 0.51 Bottom View 1 2 3 Wired Connections Front Wired Color Type 1, red UL-1430, AWG#22 2, black UL-1430, AWG#22 3, brown UL-1430, AWG#22 Tolerance: ±0.5mm Single +Vin GND +Vout 8.5 The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer 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. www.recom-international.com REV.: 0/2015 PA-3