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RP75H-11005SRW Datasheet(PDF) 8 Page - Recom International Power |
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RP75H-11005SRW Datasheet(HTML) 8 Page - Recom International Power |
8 / 15 page ENVIRONMENTAL Parameter Condition Value Operating Case Temperature Range Baseplate -40°C to +105°C Maximum Case Temperature 105°C Temperature Coefficient ±0.02%/°C max. Thermal Impedance vertical direction by natural convection (0.1m/s) without Heat-sink vertical direction by natural convection (0.1m/s) with Heat-sink 6.7°C/W 4.7°C/W Operating Humidity 5% - 95% RH Pollution Degree 24Vin, 48Vin 110Vin PD1 PD2 Shock according to EN61373 standard Thermal Shock according to MIL-STD-810F standard Vibration according to EN61373 standard Fire protection on railway vehicles according to EN45545-2, 2013 standard MTBF according to MIL-HDBK-217F standard, 25°C 336.2 x 103 hours continued on next page PB-8 REV.: 1/2016 www.recom-power.com DC/DC Converter Specifications (measured @ ta= 25°C, nominal input voltage, full load and after warm-up) RP75H-RW Series PROTECTIONS Parameter Condition Value Short Circuit Protection (SCP) below 100m Ω continuous, automatic recovery Over Voltage Protection (OVP) % of nom. Vout 115%-130%, Hiccup Mode Over Load Protection (OLP) % Iout rated 24Vin, 48Vin 110Vin 120%-150%, Hiccup Mode 150% typ. , Hiccup Mode Over Temperature Protection (OTP) +115°C Isolation Voltage 110Vin I/P to O/P I/P or O/P to Baseplate 3kVAC/1minute 1.5kVAC/1minute 24Vin, 48Vin I/P to O/P I/P or O/P to Baseplate 2.25kVDC/1minute 1.6kVDC/1minute Isolation Resistance 500 VDC 1G Ω min. Isolation Capacitance 2500pF max. Isolation Grade 24Vin, 48 Vin 110Vin Basic Insulation Reinforced Insulation Notes: Note4: An input fuse is required if the mains supply isn’t over-current protected. Recommended fuse: T30A slow blow. Thermal Calculation R thcase-ambient = 6.7°C/W (vertical) T case = Case Temperature R thcase-ambientHC = 4.7°C/W (vertical) T ambient = Environment Temperature P dissipation = Internal losses R thcase-ambient = T case - Tambient P IN = Input Power P dissipation P OUT = Output Power h = Efficiency under given Operating Conditions P dissipation = PIN - POUT = P OUTapp - P OUTapp R thcase-ambient = Thermal Impedance h Practical Example: Take the RP75H-2405SRW with 9V input Voltage and 50% load. What is the maximum ambient operating temperature? Use converter vertical in application without airflow. Eff min = 90% @ Vnom P OUT = 75W P OUTapp = 75 x 0.5 = 37.5W h = 92% (Efficiency vs. Load Graph) P dissipation = 37.5 - 37.5 = 3.26W 0.92 without Heat-sink with Heat-sink R th = T casemax - Tamb --> 6.7°C/W = 105-T amb R thHC = T casemax - Tamb --> 4.7°C/W = 105-T amb Pdissipation 3.26W Pdissipation 3.26W T amb = 83°C T ambHC = 89°C |
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