WRB-YMD-15W Series Isolated 15W Single Output DC/DC Converter SELECTION GUIDE order code Nominal Input Voltage Input Voltage range Output Output Voltag Current Current Limit Efficiency MTTF 2 V e V A A(MIN.) A(MAX.) % 3.3 4.4 7.5 11 81 335 kHrs WRB2403YMD-15W 18-36VDC 24 FEATURES WRB2405YMD-15W 18-36VDC 24 5 3 5 7.5 84 286 WRB2412YMD-15W 18-36VDC 24 12 1.25 2.5 3.7 86 286 ◆RoHS compliant WRB2415YMD-15W 18-36VDC 24 15 1 2 3 87 281 WRB4803YMD-15W 36-72VDC 48 3.3 4.4 7.5 11 83 295 WRB4805YMD-15W 36-72VDC 48 5 3 5 7.5 85 301 WRB4812YMD-15W 36-72VDC 48 12 1.25 2.5 3.7 88 302 WRB4815YMD-15W 36-72VDC 48 15 1 2 3 89 296 Units ◆High efficiency to 89% 3 ◆Power density up to 2.4W/cm ◆UL 94V-0 package material ◆Industry standard pinout INPUT CHARACTERISTICS ◆Non latching current limit ◆Constant 350kHz frequency Parameter Conditions Min. Typ. Max. Voltage range Continuous operation, 24V input types 18 24 36 Continuous operation, 48V input types 36 48 72 Min. Typ. Max. ◆1.5kV input to output isolation V ◆Versatile control options ◆Continuous rating to 15W at 40℃ without Heatsink OUTPUT CHARACTERISTICS Parameter ◆Operation to zero load 50% load Units 0.5 Case temperature -40oC to 110oC ◆Protected against load faults Overall voltage error ◆Internal over temperature protection ◆Uses no electrolytic capacitors MODEL SELECTION WR WRB B①24②03③Y④ MD⑤-15 15W W⑥ ①Product Series ③Output Voltage ⑤Metal Shield ⑦Rated Power Conditions Voltage set point error ②Input Voltage ④Wide (2:1) Input Range ⑥DIP Package Style DESCRIPTION % Load 0% - 100% Input 2.5 specified range Temperature coefficient ppmoC of output voltage (slope 250 Deviation of output voltage Temperature MIN-MAX Line regulation Operating voltage range, 50% load Load Regulation 0% - 100% rated load Ripple rms 0.5 1 % 0.1 % 70 0.5 mV Typ. Max. ISOLATION CHARACTERISTICS The WRB-YMD-15W series of DC/DC converters combines ease of application with versatility. The pin pattern is based on the popular industry standard, but two additional pins may optionally be fitted to provide a variety of features not commonly found on units of this type. High efficiency enables full rating to be achieved in a small package without heats inking, and a high surge capability will provide for start-up and transient loads, whilst being thermally protected against sustained overload. Overload protection of the “constant current” type ensures start-up into complex load conditions. The copper case achieves efficient heat transfer and screening. The product range has been recognized by Underwriters Laboratory (UL) to UL 1950 for operational insulation, file number E179522 applies. Parameter Conditions Min. Units Isolation test Flash tested for 1 second 1500 VDC Resistance VISO = 500VDC 1 GΩ ABSOLUTE MAXIMUM RATINGS Input voltage, 24V input types -0.5V to 40V Input voltage, 48V input types -0.5V to 80V Output voltage -0.3V to regulated voltage Output trim control -1V to +30V Synchronisation/shutdown control ±15V relative to input return 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2. Absolute maximum value for 30 seconds. Prolonged operation may damage the product. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. MICRODC reserves the copyright http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 4 WRB-YMD-15W Series CONTROL CHARACTERISTICS Parameter Conditions MIN. Voltage trimming range At rated load, trim control at either output ±10 TYP. MAX. Remote switch input (voltage relative to Not operating -15 0 1.5 input negative)1 Operating, open circuit voltage 9 10 11 25 50 ms 440 KHz 395 KHz Units % V Time from application of valid input Start Delay voltage to output being in specification Synchronisation Specified drive signal 320 Switching frequency 330 350 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2. Absolute maximum value for 30 seconds. Prolonged operation may damage the product. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. TEMPERATURE CHARACTERISTICS MAX. Units Full load -40 110 ºC Absolute Max. internal temperature -40 125 Parameter Case temperature Storage Relative humidity Thermal protection Conditions MIN. TYP. Non condensing 85ºC 85 Operates at case temperature % 110 ºC THERMAL CHARACTERISTICS Max. permissable loads for a given ambient temperature for any WRB-15W model. Temperature (ºC) Power (W) Temperature (ºC) Power (W) 40 15 70 11.7 50 15 80 9.8 53 15 85 8.8 60 13.7 90 7.8 Max. power rating with case temperature maintained by external means (e.g. forced air cooling). Case Temperature Part Number Units 100ºC 105ºC 110ºC WRB2403YMD-15W 19 16 12 WRB2405YMD-15W 22 19 15 WRB2412YMD-15W 25 22 19 WRB2415YMD-15W 26 24 21 WRB4803YMD-15W 20 17 13 WRB4805YMD-15W 23 20 16 WRB4812YMD-15W 28 26 23 WRB4815YMD-15W 30 28 25 W W http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 4 WRB-YMD-15W Series THERMAL PERFORMANCE 24V Input 48V Input TECHNICAL NOTES 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 specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. MICRODC Power Solutions WR-YMD-15W series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1500 VDC for 1 second. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” The WR-YMD-15W series has been recognized by Underwriters Laboratory, 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 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. While manufactured parts can 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 specifi ed test voltage. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 4 WRB-YMD-15W Series PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS Pin Function 1 -VIN 2 +VIN 3* SS 4 +VOUT 5* TRIM 6 -VOUT * Optional pins The copper case is internally connected to the output (-VOUT) pin. Care is needed in the design of this circuit board on which the converter is mounted. Top side tracks must not contact the edge of the case or the ferrite core, visible on the underside of the unit. The case size may be (LXW)50.08mmX 25.4mm. Please note that from 2010 onwards you may receive either a blue or a black case finish. RECOMMENDED FOOTPRINT DETAILS All dimensions in inches ±0.01 (mm ±0.25mm) * Optional control pins 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 4 of 4