WRA-YMT-2W&WRB-YMT-2W Series 2W, WIDE INPUT, ISOLATED & REGULATED SINGLE/DUAL OUTPUT DC/DC CONVERTER SELECTION GUIDE Input order code Output Voltage Voltage(VDC) Efficiency Current(MA) (%,Typ.) (VDC) Nominal Range Max* Max. Min. FEATURES WRA1205YMT-2W 12 9-18 22 ±5 ±200 ±20 74 ◆Wide (2:1) input range WRA1212YMT-2W 12 9-18 22 ±12 ±83 ±8 78 ◆Operating temperature: -40°C ~ +85 °C WRA1215YMT-2W 12 9-18 22 ±15 ±67 ±7 78 ◆1500VDC isolation WRB1203YMT-1W6 12 9-18 22 3.3 500 50 70 ◆No heat sink required WRB1205YMT-2W 12 9-18 22 5 400 40 74 ◆Internal SMD construction WRB1209YMT-2W 12 9-18 22 9 222 22 76 ◆MTBF>1,000,000 hours WRB1212YMT-2W 12 9-18 22 12 167 16 78 WRB1215YMT-2W 12 9-18 22 15 133 13 79 WRA2405YMT-2W 24 18-36 40 ±5 ±200 ±20 74 WRA2412YMT-2W 24 18-36 40 ±12 ±83 ±8 78 WRA2415YMT-2W 24 18-36 40 ±15 ±67 ±7 78 WRB2403YMT-1W6 24 18-36 40 3.3 500 50 72 WRB2405YMT-2W 24 18-36 40 5 400 40 76 WRB2409YMT-2W 24 18-36 40 9 222 22 78 WRB2412YMT-2W 24 18-36 40 12 167 16 80 WRB2415YMT-2W 24 18-36 40 15 133 13 80 ◆Short circuit protection(Automatic recovery) ◆Industry standard pinout ◆RoHS Compliance MODEL SELECTION ① ② ③ ④ ⑤ ⑥ WR B 24 12 Y MT -2W WRB ①Product Series ②Input Voltage ③Output Voltage ④Wide (2:1) Input Range ⑤Mini package style ⑥Rated Power *Input voltage can't exceed this value, or will cause the permanent damage. COMMON SPECIFICATIONS Item Test conditions Min. Typ. Storage humidity range DESCRIPTION The WRA_YMT-2W & WRB_YMT-2W Series are specially designed for applications where a wide range input voltage power supplies are isolated from the input power supply in a distributed power supply system on a circuit board. These products apply to: 1) Where the voltage of the input power supply is wide range ( voltage range ≤2:1 ) ; 2) Where isolation is necessary between input and output (Isolation Voltage ≤1500VDC); 3) Where the regulation of the output voltage and the output ripple noise are demanded. Max. Units 95 % Operating temperature -40 85 ℃ Storage temperature -55 125 ℃ Temp. rise at full load Lead temperature 1.5mm from case for 10 seconds Continuous, automatic recovery Free air convection Cooling Epoxy Resin (UL94-V0) Package material 1000 Weight K hours 5.2 MICRODC reserves the copyright http://www.microdc.cn ℃ 300 Short circuit protection MTBF ℃ 15 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 3 g WRA-YMT-2W&WRB-YMT-2W Series TYPICAL CHARACTERISTICS ISOLATION SPECIFICATIONS Test Conditions Min. Isolation voltage Item Tested for 1 minute and 1mA max. 1500 Isolation resistance Test at 500VDC 1000 Isolation capacitance Input/Output, 100KHz/1V Typ. Max. Units VDC MΩ 85 pF *Supply voltage must be discontinued at the end of short circuit duration. OUTPUT SPECIFICATIONS Item Test Conditions Min. Typ. Max. Units Output power See above products program 2 W Positive voltage accuracy Refer to recommended circuit 0.2 ±1 ±3 % Negative voltage accuracy Refer to recommended circuit ±3 ±5 % Load regulation From 10% to 100% load ±0.5 ±1* % Line regulation Input voltage from low to high ±0.2 ±0.5 % Temperature Drift (Vout) Refer to recommended circuit ±0.03 %/℃ Output ripple& noise** 20MHz Bandwidth 35 150 mVp-p Switching frequency 100% load, nominal input voltage 300 KHz *Dual output models unbalanced load: ±5%. **Test ripple and noise by “Parallel cable”method. See detailed operation instructions at Testing of Power Converter section, application notes. RECOMMENDED CIRCUIT APPLICATION NOTE Requirement On Output Load In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified range of input voltage is not exceeded, the minimum output load no less than 10% load. If the actual load is less than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra loading, or contact our company for other lower output power products. Recommended Circuit All the WRA_YMT-2W & WRB_YMT-2W Series have been tested according to the following recommended testing circuit before leaving factory. This series should be tested under load. (See Figure 1). If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1). General: Cin: 12V 100µF 24V&48V 10µF-47µF Cout: 10µF/100mA Input Current When it is used in unregulated power supply, be sure that the fluctuating range of the power supply and the rippled voltage do not exceed the module standard. Input current of power supply should afford the flash startup current of this kind of DC/DC module. (Figure 2) General: Ip ≤1..4*Iin-max No parallel connection or plug and play http://www.microdc.cn Output External Capacitor Table (Table 1) Single Vout (VDC) Cout Dual Vout Cout (μF) (VDC) (μF) 3.3 2200 ±5 680 5 1000 ±9 470 9 680 ±12 330 12 470 ±15 220 15 330 - - Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 3 WRA-YMT-2W&WRB-YMT-2W Series OUTLINE DIMENSIONS & PIN CONNECTIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT(TOP VIEW) DUAL/SINGLE OUTPUT TUBE OUTLINE DIMENSIONS Note: Unit:mm[ inch] Pin section tolerances:±0.10mm[±0.004inch] General tolerances:±0.25mm[±0.010inch] FOOTPRINT DETAILS Pin Single Dual 1 GND GND 7 NC NC 8 NC 0V 9 +Vo +Vo General tolerances: ±0.50mm[±0.020inch] 10 0V -Vo L=530mm[20.866inch] Tube Quantity: 21pcs 16 Vin Vin L=220mm[8.661inch] Tube Quantity: 8pcs Note: Unit :mm[inch] NC: No connection Note: 1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically. 2. Operation under 10% load will not damage the converter; However, they may not meet all specification listed. 3. Capacitor MAX load tested at input voltage range and full load. 4. All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 5. In this datasheet, all the test methods of indications are based on corporate standards. 6. Only typical models listed, other models may be different, please contact our technical person for more details. RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/Pb soldering systems. Microdc Professional Power Module,Inc. Tel:0086-20-86000646 REACH COMPLIANT INFORMATION E-mail:[email protected] Website:http://www.microdc.cn http://www.microdc.cn This series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval. Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 3