DC/DC Converter URF1D_QB Series 50W/75W/100W, wide input voltage, isolated &regulated single output DC-DC converter Patent Protection Wide range of input voltage : 66-160V Efficiency up to 92% Low no-load power Isolation voltage 3000VDC Operating temperature range:-40℃~+100℃ Input under-voltage protection, output over-voltage, over-current, short circuit, over-temperature protection International standard: 1/4 brick Meets requirements of UL60950 and railway standard EN50155 URF1D_QB Series is a high performance product designed for the field of railway applications. Output power contains 50W/75W/100W, no min. load requirement, wide input voltage 66-160VDC, which allows the base plate temperature up to 100 ℃. Further product feathers include input under-voltage protection, output over-voltage protection, short circuit protection, over temperature protection, remote control and compensated, output voltage regulation functions. Meets the EN50155 railway standard and UL/EN60950 safety standards. Widely used in the railway system and associated equipment. Selection Guide Input Voltage (VDC) Nominal (Range) Output Current (mA)(Max./Min.) Efficiency (%, Typ) @ Full Load Note: *Absolute maximum rating without damage on the converter, but it isn't recommended. Input Specifications Item Operating Conditions Input Current (no-load / full load) Nominal input URF1D24QB-50W(H) Reflected Ripple Current Nominal input Input Surge Voltage (1sec. max.) Start-up Threshold Voltage Under-voltage Shutdown Voltage Start-up Time Input Filter Pi filter Module switch on Ctrl psuspended or connected to TTL high level (3.5-12VDC) Module switch off Input current when switched off Ctrl connected to -Vin or low level (0-1.2VDC) -- Note: * the voltage of Ctrl pin is relative to input pin -Vin. Output Specifications Item Operating Conditions Output Voltage Accuracy Line Regulation Full load, the input voltage is from low to high Load Regulation MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpr

DC/DC Converter URF1D_QB Series Transient Recovery Time 25% load step change Transient Response Deviation Temperature Drift Coefficient Full load Ripple & Noise * Output voltage Regulated range(Trim) Output voltage remote compensation(Sense) Output Over-voltage Protection Output Over-current Protection Input voltage range Output Short circuit Protection Note: * The measuring method of ripple and noise, please refer to Fig. 1 . General Specifications Item Operating Conditions Input-output Switching Frequency Input-output, insulation voltage 500VDC Isolation Capacitance Insulation Resistance and...

DC/DC Converter URF1D_QB Series EMC Specifications Item Test Conditions 30MHz-1GHz Class B (see Fig. 2 for recommended circuit) Electrostatic Discharge Radiation Immunity Conducted disturbance Immunity ±2KV(1.2μs/50μs 2Ω), (see Fig. 2 for recommended circuit) ±4KV(1.2μs/50μs 12Ω), (see Fig. 2 for recommended circuit) 150KHz-30MHz Class B (see Fig. 2 for recommended circuit) Radiated Emission Test Procedure Conducted Disturbance Surge Immunity Immunities of short interruption Efficiency Curves Efficiency Vs Output Load(Vin=110V) Efficiency Vs input Voltage (Full Load) Input Voltage(V) Output Current...

DC/DC Converter URF1D_QB Series URF1D24QB-75W Thermal Curves (Vin=110V) 70 No Heatsink Natural Convection Heatsink Natural Convection Output power(W) Output power(W) Ambient temperature(℃) 50 No Heatsink Natural Convection Heatsink Natural Convection Output power(W) Output power(W) Ambient temperature(℃) Ambient temperature(℃) Ambient temperature(℃) Sense of application and precautions 1. When Remote Sense is not used +Vo sens e+ Trim sens e0V The le ad as s ho rt as po ss ible Short at pin root Notes： 1) When remote sense is not used, make sure + Vo and Sense + are shorted, and that 0V and Sense-...

DC/DC Converter URF1D_QB Series Design Reference 1. Ripple & noise All the URF1D_QB-100W series have been tested according to the following recommended test circuit before leaving the factory (see Figure 1). Copper sheet C0 sens e-Vin Connect Oscillograph Probe (20MHz bandwidth) 2. Typical application If don’t use our company’s EMC models, please make sure the input of at least 33uF electrolytic capacitor in parallel to suppress the input terminal may produce surge voltage. If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors...

DC/DC Converter URF1D_QB Series 5. Thermal design The maximum operating temperature of base- plate TB is 100 ℃, as long as the user's thermal system keeps TB <100 ℃, the converter can deliver its full rated power. A power derating curve can be calculated for any heatsink that is attached to the base-plate of the converter. It is only necessary to determine the thermal resistance, Rth(B-A), of the chosen heatsink between the base-plate and the ambient air for a given airflow rate. This information is usually available from the heatsink vendor. The following formula can the be used to determine...

DC/DC Converter Dimensions and Recommended Layout (without heatsink) THIRD ANGLE PROJECTION-^- Aluminum Baseplate Mounting hole screwing torque: Max 0.4 N-m MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO..LTD. MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpret

DC/DC Converter URF1D_QB Series Note 1. Packing Information please refer to 'Product Packing Information'. Packing bag number:58010113(without heatsink), 58010112(with heatsink); 2. Recommended used in more than 5% load, if the load is lower than 5%, then the ripple index of the product may exceed the specification, but does not affect the reliability of the product; 3. The max capacitive load should be tested within the input voltage range and under full load conditions; 4. If the customer tests EMC, suggest to take our EMC module FC-CX3D. If the customer needs to meet the performance aspects...