R-78K-2.0(L)
8Pages

Features Switching Regulator • Efficiency up to 96%, no need for heatsinks • 4.5 - 36VDC wide input voltage • -40°C to +90°C ambient operation without derating • Pin compatible with 78 series regulators • Non isolated DC/DC converter • Undervoltage and short circuit protection Description The R-78K-2.0 series is a switching regulator module that has been designed to offer all the advantages of a switching regulator (high efficiency, wide input range, accurate output voltage regulation) but with a low cost for production quantities. Due to the R-78K-2.0’s high efficiency of up to 96% no heat-sink is required, and operation from -40 to 90°C is possible without derating. The compact TO-220 compatible SIP3 package measures only 11.5 x 8.5 x 17.5, so it saves precious board space. DC/DC Converter Selection Guide Efficiency @ min. Vin @ max. Vin [%] [%] 73 REACH compliant Input Voltage Range [VDC] Part Number Model Numbering IEC/EN62368-1 3rd Edition certified EN55032 compliant CB-Report Output Current Notes: Note1: add suffix “L” for 90° bent pins, e.g. R-78K5.0-2.0L Specifications (measured @Ta= -40°C to +90°C, V = 24VDC, full load and after warm-up unless otherwise stated) IN BASIC CHARACTERISTICS Parameter Input Under Voltage Lockout (UVLO) continued on next page www.recom-power.c

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V = 24VDC, full load and after warm-up unless otherwise stated) Maximum Input Voltage Slew Rate Internal Switching Frequency Minimum Load Output Ripple and Noise Notes: Note2: At higher slew rates or hard plugging, add 27µF E-Cap between +Vin and GND, especially when Vin is >18VDC Note3: Measurements are made with a 0.1µF MLCC & 10µF E-cap across output (low ESR) Power Dissipation vs. Load 1 Power Dissipation vs. Load 0.9 Output Load [%] Output Load [%] Output Load [%] Output Load [%] continued on next page www.recom-power.com

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V R-78K1.8-2.0 = 24VDC, full load and after warm-up unless otherwise stated) Power Dissipation vs. Load Output Load [%] Output Load [%] Power Dissipation vs. Load 1 Power Dissipation vs. Load Output Load [%] Output Load [%] Output Load [%] Output Load [%] continued on next page www.recom-power.com

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V R-78K5.0-2.0 = 24VDC, full load and after warm-up unless otherwise stated) Power Dissipation vs. Load Output Load [%] Output Load [%] Power Dissipation vs. Load 1.4 Power Dissipation vs. Load Output Load [%] Output Load [%] Output Load [%] www.recom-power.com continued on next page REV.: 1/2023

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V R-78K15-2.0 = 24VDC, full load and after warm-up unless otherwise stated) Power Dissipation vs. Load Output Load [%] Output Load [%] REGULATIONS Parameter Output Accuracy Line Regulation low line to high line, full load Load Regulation PROTECTIONS Parameter Short Circuit Protection (SCP) continuous, automatic recovery Short Circuit Input Current Optional Diode Protection Circuit Add a blocking diode to Vout if current can flow backwards into the output, as this can damage the converter when it is powered down. Parameter...

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V = 24VDC, full load and after warm-up unless otherwise stated) Derating Graph (@ Chamber and natural convection 0.1m/s) Output Load [%] Output Load [%] Output Load [%] Output Load [%] SAFETY AND CERTIFICATIONS Certificate Type (Safety) Report Number Audio/Video, information and communication technology equipment - Part 1: Safety requirements 3rd Ed. (CB Scheme) 085-220299301-100 Audio/Video, information and communication technology equipment - Part 1: Safety requirements 3rd Ed.

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V = 24VDC, full load and after warm-up unless otherwise stated) Condition with external filter Electromagnetic compatibility of multimedia equipment - Emission requirements Standard / Class EN55032, Class B EMC filtering suggestions according to EN55032 C4 L1 Component List DIMENSION AND PHYSICAL CHARACTERISTICS Parameter Dimension (LxWxH) Pinning Information Pin # Function 1 +VIN 2 GND 3 +VOUT embossed logo Bottom View Bottom View Recommended Footprint Details Recommended Footprint Details embossed logo with suffix “L” bent pins

DC/DC Converter Specifications (measured @ Ta= -40°C to +90°C, V = 24VDC, full load and after warm-up unless otherwise stated) PACKAGING INFORMATION Parameter Packaging Dimension (LxWxH) Type standard Storage Temperature Range Packaging Quantity Storage Humidity