WRA-ZMD-20W＆WRB-ZMD -20W Series 20 W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC 20W, DC--DC CONVERTER SELECTION GUIDE Order code Input voltage range Output voltage Output current max. Efficiency typ. WRB2403ZMD-5500 9 – 36 VDC 3.3 VDC 5500 mA 85 % WRB2405ZMD-20W 9 – 36 VDC 5 VDC 4000 mA 88 % WRB2412ZMD-20W 9 – 36 VDC 12 VDC 1670 mA 86 % WRB2415ZMD-20W 9 – 36 VDC 15 VDC 1330 mA 86 % WRA2405ZMD-20W 9 – 36 VDC ± 5 VDC ± 2000 mA 88 % WRA2412ZMD-20W 9 – 36 VDC ± 12 VDC ± 835 mA 87 % WRA2415ZMD-20W 9 – 36 VDC ± 15 VDC ± 665 mA 87 % WRB4803ZMD-5500 18 – 75 VDC 3.3 VDC 5500 mA 85 % –40℃ to +85℃ max. WRB4805ZMD-20W 18 – 75 VDC 5 VDC 4000 mA 88 % No minimum load required WRB4812ZMD-20W 18 – 75 VDC 12 VDC 1670 mA 87 % WRB4815ZMD-20W 18 – 75 VDC 15VDC 1330 mA 87 % I/O-isolation 1500 VDC WRA4805ZMD-20W 18 – 75 VDC ± 5 VDC ± 2000 mA 89 % Remote On/Off WRA4812ZMD-20W 18 – 75 VDC ± 12 VDC ± 835 mA 88 % WRA4815ZMD-20W 18 – 75 VDC ± 15 VDC ± 665 mA 88 % FEATURES High power density in 1" x 2" metal package ◆ Ultra wide 4 : 1 input range ◆ Extended operating temperature range ◆ ◆ ◆ ◆ Adjustable output voltage ◆ Industry standard footprint ◆ Shielded metal case with insulated baseplate ◆ Input Specifications Optional heatsink ◆ Lead free design - RoHS compliant ◆ Input current at no load 3-year product warranty ◆ Input current at full load MODEL SELECTION ① ② ③ ④ ⑤ ⑥ ⑦ WRB 24 12 Z M D -20W(1670) ①Product Series ②Input Voltage ③Output Voltage ④Wide (4:1) Input Range ⑤Metal Shield ⑥2" x 1"DIP Package Style ⑦Rated Power(Output current) APPLICATIONS 24 Vin models: 50 mA typ. 48 Vin models: 35 mA typ. 24 Vin models: 1000 mA typ. 48 Vin models: 500 mA typ. Surge voltage 24 Vin models: 50 V max. (100 msec. max.) 48 Vin models: 100 V max. 5 V / ms, max. Input voltage variation (dv/df) (complies to ETS 300 132 part. 4.4) Start-up voltage / under voltage 24 Vin models: 9 VDC / 7.5 VDC typ. lockout 48 Vin models: 18 VDC / 15 VDC typ. EN 55022 level A, FCC part 15, level A with Conducted noise(input) The WRA-ZMD-20W ＆ WRB-ZMD-20W Series is a family of high performance 20W DC/DC converter modules featuring ultra wide 4:1 input voltage ranges in a ultra compact 2“x1“ low profile package with industry-standard footprint. A very high efficiency al-lows an operating temperature range of –40°C to 85°C. Further standard features include remote On/Off, output voltage trimming,over voltage protection and short-circuit protection. Typical applications for these converters are battery operated equipment and distributed power architectures in communication and industrial electronics,everywhere where isolated, tightly regulated voltages are required. external capacitor (see application note) ESD (input) EN 61000-4-2, perf. criteria B Fast transient (input) EN 61000-4-4, perf. criteria B Surge (input) EN 61000-4-5, perf. criteria B General Specifications Reliability, calculated MTBF (MIL-HDBK-217F ground benign) Isolation voltage (60 sec.) – Input/Output 1500 VDC Isolation capacity – Input/Output 1500 pF max Isolation resistance – Input/Output >1000 M Ohm Switching frequency (fixed) 400 kHz typ. (pulse width modulation PWM) Vibration Remote On/Off MICRODC RESERVES THE COPYRIGHT Safety standards http://www.microdc.cn >560000 h @ + 25 °C 10-55Hz, 10G, 30 minutes along X,Y,Z – On: 3.0 to 12 VDC or open circuit. – Off: 0 to 1.2 VDC or short circuit pin 2 and pin 6 – Off idle current: 2.5 mA typ. UL 60950 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 3 WRA-ZMD-20W＆WRB-ZMD -20W Series Output Specifications Voltage set accuracy ±1 % Output voltage ±10 % by external resistor, see application note: (single output models only) adjustment http://www.microdc.cn/uploadfiles/WRA-ZMD-20W&WRB-ZMD-20W.pdf – Input variation Vin min. to Vin max. 0.2 % max. – Load variation 0 – 100%: Regulation single output models: dual output models: – Load cross variation 25 % / 100 % 0.5 % max. 1 % max. (balanced load) 5 % max. Temperature coefficient 0.02 % /K (20 MHz Bandwidth) Ripple and noise single output models: 75 mVpk-pk max. dual output models: 100 mVpk-pk max. Start up time (nominal Vin and constant resistive load) 20 ms typ. Transient Response (25% load step change) 20 ms typ. Transient Response (25% load step change) 250 µs typ. Short circuit protection indefinite (automatic recovery) Over load protection 150% of Iout max typ. 3.3 Vout models: 5 /±5 Vout models: Over voltage protection 15 / ±15 V 15 /±15 Vout models: 18 / ±18 V 5 Vout models / ± 5 Vout models: 9600 µF max. / ± 4800 µF max. 1600 µF max. / ± 800 µF max. 15 Vout models / ±15 Vout models: 1000 µF max. / ± 500 µF max. Physical Specifications – Operating –40 °C to +85 °C – Case temperature +105 °C max. – Storage –55 °C to +125 °C Humidity (non condensing) 18’000 µF max. 12 Vout models / ±12 Vout models: General Specifications Temperature ranges 6.2 / ±6.2 V 12 /±12 Vout models: 3.3 Vout models: Capacitive load 3.9 V 95 % rel H max. Case material copper, nickel plated Baseplate material non conductive FR4 Potting material epoxy (UL 94V-0 - rated) Weight 27 g (0.95 oz) Soldering temperature max. 265 °C / 10 sec. 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_ZMD-20W&WRB_ZMD-20W 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 apacitance 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 : 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 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 3 WRA-ZMD-20W＆WRB-ZMD -20W Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSION 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) FOOTPRINT DETAILS Pin Single Dual 1 GND GND 2 Vin Vin 3 +Vo +Vo 4 NC 0V 5 0V -Vo TUBE OUTLINE DIMENSIONS 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 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 of 3