WRA_LT-3W & WRB_LT-3W Series 3W, WIDE INPUT, ISOLATED & REGULATED SINGLE/DUAL OUTPUT DC/DC CONVERTER multi-country patent protection RoHS FEATURES PRODUCT PROGRAM Wide (2:1) input range Operating temperature: -40°C ~ +85°C 1500VDC isolation No heat sink required Internal SMD construction MTBF>1,000,000 hours Short circuit protection(Automatic recovery) Industry standard pinout RoHS Compliance Input Part Number Output Voltage (VDC) Efficiency (%, Typ.) Current (mA) Voltage (VDC) Max. Min. WRA1205LT-3W * ±5 ±300 ±30 76 WRA1212LT-3W * ±12 ±125 ±13 80 ±15 ±100 ±10 80 3.3 833 83 72 WRB1205LT-3W * 5 600 60 74 WRB1212LT-3W * 12 250 25 78 WRB1215LT-3W * 15 200 20 80 WRA2405LT-3W ±5 ±300 ±30 76 WRA2412LT-3W * ±12 ±125 ±13 80 WRA2415LT-3W * ±15 ±100 ±10 80 3.3 833 83 74 WRB2405LT-3W * 5 600 60 76 power supply system on a circuit board. WRB2412LT-3W * 12 250 25 80 These products apply to: WRB2415LT-3W * 15 200 20 80 1) Where the voltage of the input power supply is WRA4805LT-3W * ±5 ±300 ±30 76 WRA4812LT-3W * ±12 ±125 ±13 80 WRA4815LT-3W * ±15 ±100 ±10 80 APPLICATIONS The WRA_LT-3W & WRB_LT-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 wide range(voltage range≤2:1); 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 dem anded. Nominal Range Max.** WRA1215LT-3W * WRB1203LT-3W * WRB2403LT-3W * WRB4803LT-3W * 12 24 48 9-18 18-36 36-72 22 40 80 3.3 833 83 74 WRB4805LT-3W * 5 600 60 76 WRB4812LT-3W * 12 250 25 80 WRB4815LT-3W * 15 200 20 80 *Designing. **Input voltage can’t exceed this value, or will cause the permanent damage. MODEL SELECTION WRB2412LT-3W Rated Power Package Style Output Voltage Input Voltage Product Series COMMON SPECIFICATIONS Max. Units Storage humidity range Item Test conditions Min. 95 % Operating temperature -40 85 Storage temperature -55 Temp. rise at full load Lead temperature 1.5mm from case for 10 seconds °C 245 Continous, autom atic recovery Cooling Address: 2th floor 6th building, Huangzhou Industrial District, Guangzhou, China Tel: 86-20-38601850 Fax: 86-20-38601272 Http://www.mornsun-power.com 125 15 Short circuit protection MORNSUN Science & Technology co.,Ltd. Typ. Package material MTBF Weight The copyright and authority for the interpretation of the products are reserved by Mornsun Free air convection Epoxy Resin (UL94-V0) 1000 K hours 5.2 g Specifications subject to change without notice. WRA_LT_3W & WRB_LT_3W A/2-2009 Page 1 of 3 ISOLATION SPECIFICATIONS TYPICAL TEMPERATURE CUTVE Item Test conditions Min. Isolation voltage Tested for 1 minute and 1mA max. 1500 Isolation resistance Test at 500VDC Isolation Capacitance Input/Output Typ. Max. Units VDC 1000 MΩ 85 pF OUTPUT SPECIFICATIONS Item Test conditions Min. Output power See above products program 0.3 Positive voltage accuracy Refer to recommended circuit Typ. ±1 Max. Units 3 W ±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 (Vout) Refer to recommended circuit Negative voltage accuracy Refer to recommended circuit 100 ±3 Operating Temp.( C ) % Recommended Reflow P rofile 50 S ec M ax (>220 ℃) Peak.Tem p 235~ 245℃ 250 ±0.03 %/°C 220℃ Output ripple& noise** 20MHz Bandwidth Switching frequency 100% load, nominal input voltage 35 75 mVp-p 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. Tem peratur e (℃) 200 190℃ 90 Sec M ax (>190 ℃) 150 100 50 0 Time ( sec.) APPLICATION NOTE RECOMMENDED CIRCUIT 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. +Vout Vin Cin DC DC GND Single Output Vin Ci n +Vout DC DC 0V GND (Figure 1) Input Current(A) Recommended Circuit All the WRA_LT-3W & WRB_LT-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 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&48V 10μF~47μF Cout: 10μF/100mA 0V -Vout Ip Input Voltage Range Input Voltage (V) (Figure 2) 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 flash startup current of this kind of DC/DC module. (Figure 2) General: Ip ≤1.4*Iin-max: No parallel connection or plug and play The copyright and authority for the interpretation of the products are reserved by Mornsun Output External Capacitor Table(Table 1) Single Vout Cout Cout Dual Vout (VDC) (uF) (VDC) (uF) 3.3 2200 ±5 680 5 1000 ±9 470 9 680 ±12 330 12 470 ±15 220 15 330 - Specifications subject to change without notice. WRA_LT_3W & WRB_LT_3W A/2-2009 Page 2 of 3 OUTLINE AND SOLDER PAD DIMENSIONS RECOMMENDED FOOTPRINT 23.86[0.939] 16 2.54[0.100] 10 9 (Top View) 1 7 8 18.60[0 .732] 15.24[0.600] 13 .70[0.539] 3.04[0.120] 1 7 8 1.00[0.039] TUBE DUTLINE DIMENSIONS 20.70[0.815] 13.80[0.543] 11.30[0.445] Note: Unit:m m[inch] Pin section tolerances: ±0.10mm[ ±0.004inch] General tolerances: ± 0.25mm [± 0.010inch] 8 .80[ 0.3 46] 1.40[0.055] FOOTPRINT DETAILS Pin Single Dual GND GND 1 NC NC 7 NC 8 0V +Vo +Vo 9 10 0V -Vo 16 Vin Vin 10 9 2.54[0.100] 5° 0.25[0.010] 16 2.54[0.100] 0.50[0.020] 1 7.22[0.678] 1.02[0.040] DUAL/SINGLE OUTPUT 2 .10[0 .083] (Side View) 0.60[0.024] NC: No connection 14.40[0.567] 8.00[0.315] 7.50[0.295] MECHANICAL DIMENSIONS 10.00[0.394] Note: Unit :mm[inch] General tolerances: ±0.50mm[±0.020inch] L=530mm[20.866inch] Tube Quantity: 21pcs L=220mm[8.661inch] Tube Quantity: 8pcs Note: 1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically. 2. Operation under 10% load will not dam age 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. The copyright and authority for the interpretation of the products are reserved by Mornsun Specifications subject to change without notice. WRA_LT_3W & WRB_LT_3W A/2-2009 Page 3 of 3