WRB-YT-1W Series 1W, WIDE INPUT, ISOLATED & REGULATED SINGLE OUTPUT DC/DC CONVERTER SELECTION GUIDE order code Input Input Voltage Current Output Current Output (VDC)* (mA) Voltage (mA) Effciency MTTF (%) (kHrs) (VDC) Nominal 0%Load 100%Load 100%Load Min. Typ. FEATURES WRB0505YT-1W 5 25 320 05 200 60.5 62 921 ◆Efficiency from 60.5% WRB0512YT-1W 5 30 300 12 83 63.5 67 1118 ◆Operating temperature: -40°C ~ +85°C WRB0515YT-1W 5 60 320 15 66 60.5 63 869 ◆1000VDC isolation WRB1205YT-1W 12 10 110 05 200 68.0 73 1281 ◆UL94V-0 package material WRB1212YT-1W 12 12 130 12 83 65.0 66 1175 ◆No external component required WRB1215YT-1W 12 15 120 15 66 65.0 67 1283 WRB2405YT-1W 24 6 120 05 200 65.0 70 1379 WRB2412YT-1W 24 8 60 12 83 65.0 68 1278 WRB2415YT-1W 24 9 60 15 66 65.0 67 1223 Typ. Max. ◆Internal SMD construction ◆MTBF>1,400,000 hours ◆ RoHS Compliance * Input voltage can not exceed this value, or will cause the permanent damage. ◆ Lead frame technology ◆5V,12V&24V Input ◆5V,12V&15V Output COMMON SPECIFICATIONS ◆ Power density 0.7W/cm3 Item ◆ Multi layer ceramic capacitors Input voltage MODEL SELECTION WR WRB B①12②05③Y④ T⑤-1W⑥ ①Product Series ②Input Voltage ③Output Voltage ④Wide (2:1) Input Range ⑤SMD14 Package Style ⑥Rated Power Test conditions Min. WRB05XXYT-1W types 10V WRB12XXYT-1W types 17.5V WRB24XXYT-1W types 40V Minimum load See graph Lead temperature 1.5mm from case for 10 seconds Cooling Free air convection 245 15s Case material Epoxy Resin (UL94-V0) ℃ 30 Case temperature rise above ambient See derating graphs Storage DESCRIPTION ℃ Free air convection Short circuit protection Operation Units -40 85 -50 130 All specifications typical at TA=25ºC, nominal input voltage and rated output current unless otherwise specified. The WRB-YT-1W 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 ≤1000VDC); 3) Where the regulation of the output voltage and the output ripple noise are demanded. INPUT CHARACTERISTICS Item voltage range Reflected ripple current Test conditions Min. Typ. Max. Units Continuous operation, 5V input types 4.5 Continuous operation, 12V input types 9 5 9 V 12 18 Continuous operation, 24V input types 18 24 V 36 V See graph 12 mA p-p 1.5mm from case for 10 seconds 6 mA p-p Free air convection 6 mA p-p MICRODC reserves the copyright http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 5 WRB-YT-1W Series TEMPERATURE DERATING ISOLATION SPECIFICATIONS Item Test Conditions Min. Isolation voltage Tested for 1 minute and 1mA max 1000 Isolation resistance Test at 500VDC 1 Isolation capacitance Typ. Max. Units WRB2405YT-1W VDC 10 GΩ 25 pF *Supply voltage must be discontinued at the end of short circuit duration. OUTPUT SPECIFICATIONS Item Test Conditions Min. Typ. Max. Units Output power Refer to products program 1 W Voltage set point accuracy With external input/output capacitors ±1 ±2 % Load regulation 10% load to 100% load, with external input/output capacitors 0.1 1 % Line regulation Low line to high line 0.2 1 % ±10 %/℃ 150 mVp-p 700 kHz Voltage trim range Ripple & noise 0.1 -10 20MHz Bandwidth,all output types Switching frequency 100 50 WRB2412YT-1W APPLICATION NOTE ISOLATION VOLTAGE “Hi Pot Test”,“Flash Tested”,“Withstand Voltage”, “Proof Voltage”, “Dielectric Withstand Voltage” & “Isolation Test Voltage” are all terms that relate to the same thing, a test voltage, applied for a specify time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. WRB-YT-1W series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” For a part holding no specific agency approvals, such as the WRB-YT-1W series, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry WRB2415YT-1W according to safety standard requirements. REPEATED HIGH-VOLTAGE ISOLATION TESTING It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials, construction and environment. The WRB-YT-1W series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specify test voltage. This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further insulation system of physical spacing or barriers. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 5 WRB-YT-1W Series TEMPERATURE DERATING WRB0505YT-1W WRB0512YT-1W WRB0515YT-1W WRB1205YT-1W WRB1212YT-1W WRB1215YT-1W WRB12XXYT-1W WRB24XXYT-1W MINIMUM LOAD WRB05XXYT-1W http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 5 WRB-YT-1W Series APPLICATION NOTES Recommended input&output capacitors Although these converters will work without external capacitors, they are Value necessary in order to guarantee the full parametric performance over the full Cin Cout 10μF, 200V 22μF, 16V good low esr capacitor good low esr capacitor line and load range. All parts have been tested and characterized using the following values and test circuit. Test circuit, 5V, 12V and 15V output ON/OFF Pin This provides an OFF function, which puts the converter into a low power mode. When the pin is un-connected, the converter is on. The circuit used must be able to sink a peak current of 50mA to guarantee turning the converter off. The circuit should be an open collector arrangement, an example circuit is shown below. Voltages should not be applied directly to the ON/OFF pin. The BC547 should be fited close to the WRB-YT-1W ON/OFF pin to prevent the addition of excess wiring capacitance. CONTROL PIN CIRCUIT INPUT VOLTAGE VCONTROL Min. Max. Units Module ON 0 0.2 V Module OFF 1.6 30 V Output voltage adjustment The trim resistor equations are: Where: G L K WRB0505YT-1W 30100 1.24 3.76 WRB1205YT-1W,WRB2405YT-1W 100000 1.24 3.76 WRBXX12YT-1W 38300 2.5 9.5 WRBXX15YT-1W 49900 2.5 12.5 TRIM UP TRIM DOWN When the output voltage is trimmed up, output current must be derated so that the maximum output power is not exceeded. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 5 WRB-YT-1W Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT All dimensions in inches ±0.02 (mm ±0.5mm). TUBE OUTLINE DIMENSIONS All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch Weight: 2.8g FOOTPRINT DETAILS Pin Function Pin Function 1 -Vin 14 NA 3 +Vin 16 TRIM 5 NA 18 NA 9 NA 22 ON/OFF 11 -Vo 24 NA 13 +Vo 26 NA All dimensions in inches ±0.02 (mm±0.5). NA:Not available for electrical connection. Tube length: 18.70±0.079 (475±2.0). Tube Quantity : 25 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. Only typical models listed, other models may be different, please contact our technical person for more details. 6. In this datasheet, all the test methods of indications are based on corporate standards. 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 5 of 5