WRA-YMD-12W＆WRB-YMD -12W Series 12W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER SELECTION GUIDE FEATURES Ultrawide 2:1 Input Range 18–36 VDC and ◆ Order code Input voltage range Output voltage Output current max. Efficiency typ. WRB2403YMD-2400 18－36 VDC 3.3 VDC 2400 mA 78 % WRB2412YMD-12W 18－36 VDC 12 VDC 1000 mA 84 % WRB2415YMD-12W 18－36 VDC 15 VDC 800 mA 84 % WRA2412YMD-12W 18－36 VDC ± 12 VDC ± 500 mA 84 % WRA2415YMD-12W 18－36 VDC ±15 VDC ± 400 mA 84 % WRB4803YMD-2400 36－72 VDC 3.3 VDC 2400 mA 80 % WRB4812YMD-12W 36－72 VDC 12 VDC 1000 mA 84 % WRB4815YMD-12W 36－72 VDC 15 VDC 800 mA 84 % Level A without external Components WRA4812YMD-12W 36－72 VDC ± 12 VDC ± 500 mA 84 % Indefinite Short-Circuit Protection WRA4815YMD-12W 36－72 VDC ±15 VDC ± 400 mA 84 % 36–72 VDC Input Filter meets EN 55022,Class A and FCC, ◆ ◆ Overvoltage Protection ◆ I/O-Isolation 1500 VDC ◆ 2" x 1" Metal Package Input Specifications Insulated Baseplate Input current(no load) ◆ ◆ 24 Vin models 40 mA typ. 48 Vin models MTBF>1000Khours ◆ Industry Standard Pin out ◆ 2 Year Product Warranty ◆ Input current(full load) MODEL SELECTION ① ② ③ ④ ⑤ ⑥ ⑦ WRB 24 12 Y M D -12W(1000) ①Product Series ②Input Voltage ③Output Voltage ④Wide (2:1) Input Range ⑤Metal Shield ⑥2" x 1"DIP Package Style ⑦Rated Power(Output current) Surge voltage(1 sec. max.) 20 mA typ. 24 Vin; 3.3 Vout models: 425 mA typ. 24 Vin; 5 & ±5 Vout models: 510 mA typ. 24 Vin; other output models: 600 mA typ. 48 Vin; 3.3 Vout models: 215 mA typ. 48 Vin; 5 & ±5 Vout models: 255 mA typ. 48 Vin; other output models: 300 mA typ. 24 Vin models 42 V max. 48 Vin models 84 V max. Reverse voltage protection 1.0 A max. Conducted noise (input) EN 55022 level A, FCC part 15, level A APPLICATIONS The WRA-YMD-12W ＆ WRB-YMD-12W Series series of DC/DC converters has been designed for a wide range of applications including communications, industrial systems and battery powered mobile equipments. Key features are high power density (12W in a 2“x1“x 0.4“ package) and ultrawide input ranges of 18–36 VDC and 36–72VDC. Other features of this converter are internal filtering according to EN55022, level A, safety approval to EN60950 and UL1950, wide operating temperature range and remote on/off (opt.). MICRODC RESERVES THE COPYRIGHT http://www.microdc.cn General Specifications Temperature ranges – Operating – 40℃～+ 60℃ – Case temperature + 95℃ max. – Storage – 40 ℃～+ 125 ℃ Derating above 60℃: 3% /℃ Humidity non condensing 95 % rel H max. Reliability, calculated MTBF MIL-HDBK-217 E > 700000 h @ +25℃ Isolation voltage Input/Output 1500 VDC Isolation capacity Input/Output 200 pF typ Isolation resistance Input/Output (500 VDC) Switching frequency fixed > 1000 M Ohm 400 kHz typ. (Pulse width modulation PWM) Remote ON/OFF (optional): This pin can be added arr-cording to customer’s need ON: 2.5～5.5 VDC or open circuit. OFF: 0～0.8 VDC or short circuit pin 2 and pin 6 OFF idle current: 10 mA max. Safety standards: UL 1950, EN 60950, IEC 60950 Compliance up to 60 VDC input voltage (SELV limit) Safety approvals: cUL/UL File E188913 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 3 WRA-YMD-12W＆WRB-YMD -12W Series TYPICAL CHARACTERISTICS Output Specifications Voltage set accuracy Regulation Ripple and noise ± 0.5 % max. – Load variation 10 – 90 % ± 0.5 % max. 20 MHz Bandwidth 50 mVpk-pk typ. Temperature coefficient ± 0.02 % /℃ Output current limitation – single output models >110% of Iout max. foldback Hiccup mode, indefinite automatic recovery) 470 µF max. – dual output models 100 µF max. Short circuit protection Capacitive load Temperature Derating Graph ±1% – Input variation Vin min. to Vin max. Physical Specifications Case material Steel chrome-nickel plated Baseplate Epoxy Potting material Silicon rubber (flammability to UL 94 V-0) Weight 30 g (1.2 oz) Soldering temperature max. 250℃ / 10 sec. RECOMMENDED CIRCUIT Output Graph 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_YMD-12W&WRB_YMD-12W 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: 10μF-47μF Cout: 10μF/100mA CTRL Terminal When open or high impedance,the converter work well; When this pin is ‘high’; the converter shutdown; It should be note that the input current (Ic) should between 5-10mA, exceeding the maximum 20mA will cause permanence damage to the converter. The value of R Can be derived as follows : Output External Capacitor Table(Table 1) Input current While using unstable power source,please ensure the output voltage and ripple voltage do not exceed indexes of the converter.The preceding power source must be able to provide for converter sufficient starting current Ip(Figure 2). General:Ip≤1.6*Iin-max No parallel connection or plug and play http://www.microdc.cn Single Vout Cout Dual Vout Cout (VDC) (μF) (VDC) (μF) 5 680 ±5 680 12 470 ±12 330 15 330 ±15 220 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 3 WRA-YMD-12W＆WRB-YMD -12W Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT Note: Unit:mm[inch] Pin section tolerances:±0.10mm[±0.004inch] General tolerances:±0.25mm[±0.010inch] RECOMMENDED FOOTPRINT Top view,grid:2.54mm(0.1inch) diameter:1.00mm(0.039inch) TUBE OUTLINE DIMENSIONS FOOTPRINT DETAILS Pin Single Dual 1 GND GND 2 Vin Vin 3 +Vo +Vo 4 NC 0V 5 0V -Vo NC:No connection When the environment temperature is higher than 71℃, the product output power should be less then 60% of the rated power. No parallel connection or plug and play. Use dual output simultaneously,forbid pening output pin (0V) to use as single output. Note: Unit :mm[inch] General tolerances:±0.50mm[±0.020inch] L=230mm[9.055inch] Tube Quantity: 7pcs 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°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 4. In this data sheet, 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. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 3