WRA-ZD-3W＆WRB-ZD-3W Series 3W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER SELECTION GUIDE FEATURES Input ◆Wide (4:1) Input Range Output Efficiency ◆Short Circuit Protection(automatic recovery) Order code ◆Five sided metal shielding ◆No external component required ◆Internal SMD construction No-load Voltage Current(mA) (%.Typ.) Nominal Range Max* (mA)(typ) (VDC) Max. Min. WRA2405ZD-3W 24 9-36 40 16 ±5 ±300 ±30 76 WRA2412ZD-3W 24 9-36 40 16 ±12 ±125 ±12 81 WRA2415ZD-3W 24 9-36 40 16 ±15 ±100 ±10 83 WRB2403ZD-900 24 9-36 40 16 3.3 900 90 76 ◆1500VDC Isolation ◆Operating Temperature: -40℃～﹢85℃ Voltage(VDC) WRB2403ZD-3W 24 9-36 40 16 3.3 909 91 74 ◆RoHS Compliance WRB2405ZD-3W 24 9-36 40 16 5 600 60 76 ◆MTBF>1000Khours WRB2412ZD-3W 24 9-36 40 16 12 250 25 81 WRB2415ZD-3W 24 9-36 40 16 15 200 20 81 WRA4805ZD-3W 48 18-72 80 8 ±5 ±300 ±30 85 WRA4812ZD-3W 48 18-72 80 8 ±12 ±125 ±12 83 WRA4815ZD-3W 48 18-72 80 8 ±15 ±100 ±10 85 WRB4803ZD-3W 48 18-72 80 8 3.3 909 91 74 WRB4805ZD-3W 48 18-72 80 8 5 600 60 78 WRB4812ZD-3W 48 18-72 80 8 12 250 25 80 WRB4815ZD-3W 48 18-72 80 8 15 200 20 80 Typ. Max. Units 95 % MODEL SELECTION WRB①24②12③Z④ D⑤-3W 3W(250) (250)⑥ ①Product Series ②Input Voltage ③Output Voltage ④Wide (4:1) Input Range ⑤DIP Package Style ⑥Rated Power(Output current) APPLICATIONS The WRA_ZD-3W&WRB_ZD-3W 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≤4:1); 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. COMMON SPECIFICATIONS Parameter Conditions Min. Storage humidity Operating temperature -40 85 ℃ Storage temperature -55 125 ℃ Lead temperature Free Air Convection Short circuit protection Continuous,automatic recovery Steel,nickel plated, plastic Isolation voltage Tested for1 minute and 1mA max 1500 Isolation resistance Test at 500VDC 1000 MΩ 1000 Weight http://www.microdc.cn VDC 1000 Isolation Capacitance MTBF ℃ 300 1.5mm from case for 10 seconds Cooling Case material MICRODC reserves the copyright ℃ 15 Temp. rise at full load Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 pF K hours 15 g page 1/3 WRA-ZD-3W＆WRB-ZD-3W Series TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Output power See below products program 0.3 Positive voltage accuracy Refer to recommended circuit Negative voltage accuracy TYPICAL CHARACTERISTICS Typ. Max. Units 3 W ±1 ±3 % Refer to recommended circuit ±3 ±5 % Load regulation Form 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 %/℃ Ripple** 20MHz Bandwidth 75 150 mVp-p Noise** 20MHz Bandwidth 75 150 mVp-p Switching frequency 100% load, input voltage range 300 KHz Temperature Derating Graph RECOMMENDED CIRCUIT * Dual output models unbalanced load: ±5%. Output Graph ** Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power Converter section, application notes. 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_ZD-3W&WRB_ZD-3W 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 should not be too high, or may cause start-up problem. General: Cin: 24V＆48V 10μF-47μF Cout: 10μF/100mA Input current Output External Capacitor Table(Table 1) 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≤1.4*Iin-max No parallel connection or plug and play http://www.microdc.cn Single Vout Cout Dual Vout Cout (VDC) (μF) (VDC) (μF) 3.3 2200 ±5 680 5 1000 ±12 330 12 470 ±15 220 15 330 -- -- Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 page 2/3 WRA-ZD-3W＆WRB-ZD-3W Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT RECOMMENDED FOOTPRINT Top view grid:2.54mm(0.1inch) diameter:1.00mm(0.039inch) Note: Unit:mm[inch] Pin section tolerances:±0.10mm[±0.004inch] General tolerances:±0.25mm[±0.010inch] TUBE OUTLINE DIMENSIONS FOOTPRINT DETAILS Pin Single Dual 2、3 GND GND 9 NC 0V 10、15 NC NC 11 NC -Vo 14 +Vo +Vo 16 0V 0V 22、23 Vin Vin NC:No connection When the environment temperature is higher than 71 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: Note: Unit :mm[inch] General tolerances:±0.50mm[±0.020inch] L=530mm[20.866inch] Tube Quantity: 15pcs L=220mm[8.661inch] Tube Quantity: 6pcs 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 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. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 page 3/3