3W, Wide input voltage, isolated & regulated single output DC/DC converter FEATURES Patent Protection RoHS Remote On/Off WRF_MT-3W series are isolated 3W DC-DC products with 2:1 input voltage. They feature efficiency up to 79%, 3000VDC isolation, operating temperature of -40 ~+85, output short-circuit protection, which make them widely applied in battery power supplies, industrial control, electricity, instruments, communication fields. Selection Guide Part No. Compact SMD Package Efficiency up to 79% Wide input voltage range (2:1) Operating temperature range: -40 to +85 Isolation voltage: 3.0K VDC Short circuit protection (self-recovery) Low no-load power consumption Input Voltage (VDC) Output Efficiency Nominal Output Voltage Output Current (%,Min./Typ.) Max.* (Range) (VDC) (ma)(max./min.) @ Full Load Max. Capacitive Load 4 (µf) WRF1205MT-3W 12 5 600/30 74/76 2200 20 WRF1212MT-3W (9-18) 12 250/12 77/79 680 WRF2405MT-3W WRF4803MT-3W 24 (18-36) 48 (36-75) Notes:* Exceeding the maximum input voltage may cause permanent damage. Input Specifications 40 5 600/30 75/77 2200 80 3.3 909/45 72/74 2700 Input Current (full load / no-load) Reflected Ripple Current Input impulse Voltage (1sec. max.) Starting Voltage Input Filter Ctrl function* Hot Plug 12VDC input -- 322/20 338/30 24VDC input -- 162/7 167/10 48VDC input -- 84/7 87/10 12VDC input -- 30 -- 24VDC input -- 110 -- 48VDC input -- 45 -- 12VDC input -0.7 -- 25 24VDC input -0.7 -- 50 48VDC input -0.7 -- 100 12VDC input 4.5 -- 9 24VDC input 11 -- 18 48VDC input 24 -- 36 Models ON Models OFF Note: *Please refer to "Design Considerations" as the direction for use of Ctrl. Output Specifications Capacitor filter Ctrl open or be insulated ma VDC Connect high level voltage,and ensure the current into Ctrl to be 5-10mA Unavailable Output Voltage Accuracy 5%-100% load -- ±1 ±3 No load output Voltage Accuracy Input voltage range -- ±1.5 ±5 Line Regulation Full load, the input voltage is from low to high -- ±0.2 ±0.5 Load Regulation 5%-100% load -- ±0.2 ±0.8 Transient Recovery Time 25% load step change -- 0.5 3 ms % 2016.01.19-A/4 Page 1 of 5
Transient Response Deviation -- ±2.5 ±5 % Temperature Coefficient Full load -- ±0.02 ±0.03 %/ Ripple& Noise* 20MHz bandwidth -- 45 100 mv p-p Short circuit Protection Continuous Note: *Ripple and noise are measured by parallel cable method, please see DC-DC Converter Application Notes for specific operation. General Specifications Isolation Voltage Input-output, with the test time of 1 minute and the leak current lower than 1mA 3000 -- -- VDC Isolation Resistance Input-output, isolation voltage 500VDC 1000 -- -- MΩ Isolation Capacitance Input-output, 100KHz/0.1V -- 35 45 pf Operating Temperature Derating when operating temperature up to 85 (see Fig. 1) -40 -- 85 Storage Temperature -55 -- 125 Pin Welding Resistance Temperature Welding spot is 1.5mm away from the casing, 10 seconds -- -- 300 Storage Humidity Non-condensing -- -- 95 %RH Switching Frequency PFM Mode -- 250 -- KHz MTBF MIL-HDBK-217F@25 1000 -- -- K hours Reflow Soldering Temperature Peak temp. 240, maximum duration time 60s at 217. For ac tual application, please refer to IPC/JEDEC J-STD-020D.1. Physical Specifications Dimension Weight Cooling Method 19.20*12.90*8.50mm 4.8g (Typ.) Free convection EMC Specifications EMI EMS CE CISPR22/EN55022 CLASS B (see Fig.3-2 for recommended circuit) RE CISPR22/EN55022 CLASS B (see Fig.3-2 for recommended circuit) ESD IEC/EN61000-4-2 Contact ±4KV perf. Criteria B RS IEC/EN61000-4-3 10V/m perf. Criteria A EFT IEC/EN61000-4-4 ±2KV (see Fig.3-1 for recommended circuit) perf. Criteria B Surge IEC/EN61000-4-5 ±2KV (see Fig.3-1for recommended circuit) perf. Criteria B CS IEC/EN61000-4-6 3 Vr.m.s perf. Criteria A Voltage dips, short interruptions and voltage variations immunity IEC/EN61000-4-29 0-70% perf. Criteria B Product Characteristic Curve Output Power Percentage(%) Temperature Derating Curve 120 100 80 60 Safe Operating Area 40 20 0-40 0 40 85 105120 Operating Temperature( ) Fig. 1 2016.01.19-A/4 Page 2 of 5
Design Reference 1.Recommended circuit All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery. If a further decrease of the input and output ripple is required, properly increase the input & output of additional capacitors Cin and Cout or select capacitors of low equivalent impedance,and ensure the capacitance should be lower than the max. Vin GND Cin DC Fig. 2 DC Cout +Vo 0V Vin(VDC) Cin(µF) Cout(µF) 12 100 10 24 100 10 48 10~47 10 2.EMC solution-recommended circuit Vin GND FUSE MOV C0 1 + C1 LDM1 2 Ctrl C2 CY1 D1 R Cd 3 Vin +Vo DC/DC Ctrl GND 0V C3 LOAD Fig. 3 Note: 1. Part 1 in the Fig. 3 is for EMS test, part 2 is for EMI filtering; parts 1 and 2 can be added based on actual requirement; 2. If there is no recommended parameters, the model no require the external component; 3. VC is the voltage to GND from Ctrl, VD is the forward conduction voltage drop of D1, IC is the current through Ctrl pin which is normally 5-10mA, the external circuit of Ctrl is as shown in figure3-3. 2016.01.19-A/4 Page 3 of 5
Parameter description Model Vin:12V Vin:24V Vin:48V FUSE Choose according to actual input current MOV S14K20 S20K30 S14K60 C0 680uF/50V 330μF/50V 330μF/100V C1 4.7μF/50V 4.7μF/100V LDM1 12μH C2 4.7μF/50V 4.7μF/100V CY1 D1 1nF/3KV RB160M-60/1A -V -1.0 C D R Follows: R = - 300 IC Cd C3 V 47nF/100V Refer to the Cout in Fig.2 3.Ctrl Terminal When open or high impedance, the converter works well.when this pin is high,the converter shut down. It should be note that the input current should be between 5-10mA,exceeding the maximum 20mA will cause permanent damage to the converter. The value of R can be derived as follows: V R = C -V I D C -1.0-300 For detailed parameter, please refer to EMC solution-recommended circuit. 4.Output load requirements When using, the minimum load of the module output should not be less than 5% of the nominal load. In order to meet the performance parameters of this datasheet, please connect a 5% dummy load in parallel at the output end, the dummy load is generally a resistor, please note that the resistor needs to be used in derating. 5.Input current When the electricity is provided by the unstable power supply, please make sure that the range of the output voltage fluctuation and the ripple voltage of the power supply do not exceed the indicators of the modules. Input current of power supply should afford the flash startup current of this kind of DC/DC module(see Fig. 5). Generally: Vin=12V series lave =630mA Vin=24V series lave =311mA Vin=48V series lave =162mA Input Current(A) Iave Input Voltage scope Input Voltage (V) Fig. 5 6.It is not allowed to connect modules output in parallel to enlarge the power 7. For more information about Mornsun EMC Filter products, please visit www.mornsun-power.com to download the Selection Guide of EMC Filter 2016.01.19-A/4 Page 4 of 5
Dimensions and Recommended Layout Notes: 1. Packing information please refer to Product Packing Information which can be downloaded from www.mornsun-power.com. Horizontal Packing Bag Number : 58210035; 2. Recommend to use module with more than 5% load, if not, the ripple of the product may exceeds the specification, but does not affect the reliability of the product; 3. The maximum capacitive load offered were tested at nominal input voltage and full load; 4. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25, humidity<75%rh with nominal input voltage and rated output load; 5. All index testing methods in this datasheet are based on our Company s corporate standards; 6. The performance parameters of the product models listed in this manual are as above, but some parameters of non-standard model products may exceed the requirements mentioned above. Please contact our technicians directly for specific information; 7. We can provide product customization service; 8. Specifications are subject to change without prior notice. Mornsun Guangzhou Science & Technology Co., Ltd. Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, P. R. China Tel: 86-20-38601850-8801 Fax: 86-20-38601272 E-mail: info@mornsun.cn 2016.01.19-A/4 Page 5 of 5