WRA-YD-2W&WRB-YD-2W Series 2W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER SELECTION GUIDE Input Order code Output Voltage(VDC) Voltage (VDC) Current(mA) Efficiency (%,Typ) Nominal Range Max.* Max. Min. WRA1205YD-2W 12 9-18 22 ±5 ±200 ±20 75 WRA1212YD-2W 12 9-18 22 ±12 ±83 ±8 78 WRA1215YD-2W 12 9-18 22 ±15 ±67 ±7 78 WRB1203YD-2W 12 9-18 22 3.3 455 45 70 ◆2:1 wide input voltage range WRB1205YD-2W 12 9-18 22 5 400 40 74 ◆Operating temperature: -40℃to +85℃ WRB1209YD-2W 12 9-18 22 9 222 22 76 WRB1212YD-2W 12 9-18 22 12 167 16 78 WRB1215YD-2W 12 9-18 22 15 133 13 78 ◆No heat sink required WRA2405YD-2W 24 18-36 40 ±5 ±200 ±20 76 ◆No external component required WRA2412YD-2W 24 18-36 40 ±12 ±83 ±8 78 WRA2415YD-2W 24 18-36 40 ±15 ±67 ±7 79 FEATURES ◆Miniature DIP package ◆1500VDC isolation ◆Industry standard pinout WRB2403YD-2W 24 18-36 40 3.3 455 45 72 ◆Internal SMD construction WRB2405YD-2W 24 18-36 40 5 400 40 76 ◆Short circuit protection(automatic recovery) WRB2409YD-2W 24 18-36 40 9 222 22 78 ◆RoHS Compliance WRB2412YD-2W 24 18-36 40 12 167 16 80 WRB2415YD-2W 24 18-36 40 15 133 13 79 *Input voltage can ' t exceed this value, or will cause the permanent damage. MODEL SELECTION ① ② ③ ④ ⑤ ⑥ WRB 24 05 Y D -2W ①Product Series ③Output Voltage ⑤DIP package style ②Input Voltage ④Wide (2:1) Input Range ⑥Rated Power OUTPUT SPECIFICATIONS Parameter Test conditions Min. Typ. Storage humidity APPLICATIONS The WRA_YD-2W&WRB_YD-2W Operating temperature -40 Storage temperature -55 Temp. rise at full load series are Lead temperature specially designed for applications where a wide No-load power consumption range input voltage power supplies are isolated from Cooling the input power supply in a distributed power supply Short circuit protection system on a circuit board. These products apply to: Case material 1) Where the voltage of the input power supply is wide 1.5mm from case for 10 seconds Units 95 % 85 ℃ 125 ℃ ℃ 15 300 0.2 ℃ W Free air convection Continuous, automatic recovery Plastic(UL94-V0) MTBF 1000 Weight range (voltage range≤2:1); Max. K hours 4.8 g 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. ISOLATION SPECIFICATIONS Parameter Test conditions Min. Isolation voltage Tested for 1 minute and 1 mA max 1500 Isolation resistance Test at 500VDC 1000 Isolation Capacitance Input/Output, 100KHz/1V Typ. Max. VDC MΩ 85 MICRODC reserves the copyright http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Units Page 1 of 3 pF WRA-YD-2W&WRB-YD-2W Series TYPICAL CHARECTERISTICS COMMON SPECIFICATIONS Parameter 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 Refer to recommended circuit ±0.03 %/℃ Ripple & Noise** 20MHz Bandwidth 50 100 mVp-p Switching frequency 100% load, input voltage range 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 1) 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. 2) Recommended Circuit All the WRA_YD-2W & WRB_YD-2W series have been tested according to the following recommended testing circuit before leaving factory (Figure 1). This series should be tested under load. 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 10µF~47µF Cout: 10µF/100mA 3) 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 startup current of this kind of DC/DC module (Figure 2) General: Ip ≤1.4*Iin-max: 4) No parallel connection or plug and play http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 3 WRA-YD-2W&WRB-YD-2W Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT(TOP VIEW) TUBE OUTLINE DIMENSIONS 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. All specifications measured at Ta=25℃, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 4. In this datasheet, all the test methods of indications are based on corporate standards. 5. Only typical models listed, other models may be different, please contact our technical person for more details. RoHS COMPLIANT INFORMATION Microdc Professional Power Module,Inc. This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C Tel:0086-20-86000646 E-mail:[email protected] for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Website:http://www.microdc.cn Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are Microdc Professional Power module,Inc.makes no representation that backward compatible with Sn/Pb soldering systems. the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or REACH COMPLIANT INFORMATION future patent rights. Specifications are subject to change without notice. This series has proven that this product does not contain harmful chemicals, it also has harmful chemical ©2010 substances through the registration, inspection and approval. Microdc Professional Power Module, Inc. Guangzhou http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 3