WRA-ZD-8W＆WRB-ZD -8W Series 8W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC DC--DC CONVERTER SELECTION GUIDE Order code Input voltage range Output voltage Output current max. Efficiency typ. WRB2403ZD-8W 9 – 36 VDC 3.3 VDC 2400 mA 85 % WRB2403ZD-8W 9 – 36 VDC 5 VDC 1600 mA 87 % FEATURES WRB2412ZD-8W 9 – 36 VDC 12 VDC 666 mA 86 % WRB2415ZD-8W 9 – 36 VDC 15 VDC 533 mA 86 % ◆Wide (4:1) Input Range WRA2405ZD-8W 9 – 36 VDC ±5 VDC ±800 mA 84 % WRA2412ZD-8W 9 – 36 VDC ±12 VDC ±333 mA 86 % WRA2415ZD-8W 9 – 36 VDC ±15 VDC ±267 mA 86 % ◆1500VDC Isolation WRB4803ZD-8W 18 – 75 VDC 3.3 VDC 2400 mA 85 % WRB4805ZD-8W 18 – 75 VDC 5 VDC 1600 mA 87 % ◆Operating Temperature: -40℃～﹢85℃ WRB4812ZD-8W 18 – 75 VDC 12 VDC 666 mA 87 % WRB4815ZD-8W 18 – 75 VDC 15 VDC 533 mA 88 % WRA4805ZD-8W 18 – 75 VDC ±5 VDC ±800 mA 84 % WRA4812ZD-8W 18 – 75 VDC ±12 VDC ±333 mA 87 % WRA4815ZD-8W 18 – 75 VDC ±15 VDC ±267 mA 87 % WRB7203ZD-8W 43 – 160 VDC 3.3 VDC 2400 mA 84 % ◆3-year product warranty WRB7205ZD-8W 43 – 160 VDC 5 VDC 1600 mA 85 % WRB7512ZD-8W 43 – 160 VDC 12 VDC 666 mA 86 % ◆Internal SMD construction WRB7515ZD-8W 43 – 160 VDC 15 VDC 533 mA 86 % ◆RoHS Compliance WRA7205ZD-8W 43 – 160 VDC ±5 VDC ±800 mA 82 % WRA7212ZD-8W 43 – 160 VDC ±12 VDC ±333 mA 85 % WRA7215ZD-8W 43 – 160 VDC ±15 VDC ±267 mA 85 % ◆DIP-24 metal package ◆High efficiency up to 88 % ◆Remote On/Off ◆No minimum load required ◆MTBF>1000Khours *Input voltage can’t exceed this value,or will cause the permanent damage. MODEL SELECTION ① ② ③ ④ ⑤ ⑥ WRB 24 12 Z D -8W(666) ①Product Series ③Output Voltage ⑤DIP Package Style ②Input Voltage ④Wide (4:1) Input Range ⑥ Rated Power General Specifications Temperature ranges – Operating –40°C to +85°C – Case temperature +105°C max. – Storage –55°C to +125°C Power derating Thermal inpedance 3 %/K above +70°C – Natural convection 18.2°C/W – Natural convection with heat sink 15.8°C/W Humidity (non condensing) APPLICATIONS The WRA-ZD-8W ＆ WRB-ZD-8W series is a family of high 5 – 95 % rel. H max. Isolation voltage(60 sec.) – Input / Output 1500 VDC Isolation resistance – Input / Output >1000 M Ohm Isolation capacitance – Input / Output performance 8 Watt dc/dc converter modules featuring ultra wide Switching frequency 4:1 with Thermal shock, mechanical shock & vibration industry-standard footprint. Input voltages up to 160 VDC, – Test conditions input voltage ranges in a DIP-24 package excellent EMC characteristics and EN 50155 approval make this Safety standards product the best choice for many demanding applications in Safety approvals – UL/cUL railroad and transportation systems. Further standard features Remote On/Off – On: http://microdc.cn/uploadfiles/WRA-ZD-8W&WRB-ZD-8W.PDF UL/cUL 60950-1, IEC/EN 60950-1, EN 50155 – Off: include remote On/Off, over voltage protection, under voltage 1500 pF max. 300 kHz typ. (pulse width modulation PWM) 3.0 ... 12 VDC or open circuit 0 ... 1.2 VDC or short circuit pin 1 and pin 2/3 – Off idle current: lockout and short circuit protection. Typical applications for these 2.5 mA converters are also in wireless networks, telecom/datacom, Reliability, calculated MTBF(MIL-HDBK-217F, at +25°C, ground benign) industry control systems and measurement equipments. Environmental 1 Mio. h – Reach – RoHS RoHS directive 2002/95/EC Physical Specification MICRODC reserves the copyright http://www.microdc.cn Casing material copper, nickel plated Baseplate material non conductive FR4 Potting material epoxy (UL94V-0 rated) Weight 18 g (0.63 oz) Soldering temperature max. 265°C / 10 sec. Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 page 1/4 WRA-ZD-8W＆WRB-ZD -8W Series Input Specifications Input current (no load) 9–36 Vin, 3.3 VDC & 5 VDC models: 40 mA typ. 9–36 Vin other models: 25 mA typ. 18–75 Vin, 3.3 VDC & 5 VDC models: 20 mA typ. 18–75 Vin other models: 13 mA typ. 43–160 Vin, 3.3 VDC & 5 VDC models: 8 mA typ. 43–160 Vin other models: 5 mA typ. Input current (full load) 9–36 Vin models: 410 mA typ 18–75 Vin models: 210 mA typ 43–160 Vin models: 90 mA typ. Input voltage variation (dv/dt) 5 V/ms, max. (complies with ETS300 132 part 4.4) Start-up voltage Under voltage shut down (lock-out circuit) Surge voltage (100 msec. max.) 9–36 Vin models: 9.0 VDC (or lower) 18–75 Vin models: 18 VDC (or lower) 43–160 Vin models: 43 VDC (or lower) 9–36 Vin models: 8.0 VDC typ. 18–75 Vin models: 16 VDC typ. 43–160 Vin models: 42 VDC typ. 9–36 Vin models: 50 V max. 18–75 Vin models: 100 V max. 43–160 Vin models: 170 V max. Reflected ripple current 20 mAp-p typ. EN 55022 class A with external components Conducted noise see application note: ESD (electrostatic discharge) EN 61000-4-2, air ±8 kV, contact ±6 kV,perf. criteria A Radiated immunity EN 61000-4-3, 20 V/m, perf. criteria A Fast transient / surge (with external input EN 61000-4-4, ±2 kV, perf. criteria A EN 61000-4-5, ±2 kV perf. criteria A capacitor) – external input capacitor 24/48 Vin models: 110 Vin models: Conducted immunity Nippon chemi-con KY 220 µF, 100 V, ESR 48 mOhm Nippon chemi-con KX J 150 µF, 200 V, ESR 48 mOhm EN 61000-4-6, 10 Vrms, perf. criteria A Output Specifications Voltage set accuracy ±1 % Regulation – Input variation Vin min. to Vin max. – Load variation 0 – 100 % single output models: dual output models: – Load cross variation 25 % / 100 % 0.2 % max. 0.5 % max. 1 % max. 5 % max. Minimum load not required Temperature coefficient ±0.02 %/K Ripple and noise (20 MHz bandwidth) 24/48 Vin models: 50 mVp-p typ. 110 Vin models: 75 mVp-p typ. Start up time – Power On 450 ms typ. (constant resistive load) – Remote On 5 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. Over voltage protection(only single output models) Capacitive load 3.9 V 5 V output: 6.2 V 12 V output: 15 V 15 V output: 18 V 3.3 VDC & 5 VDC models: TEMPERATURE CHARACTERISTICS http://www.microdc.cn 3.3 V output: 1330 µF 12 VDC models: 288 µF 15 VDC models: 200 µF ±5 VDC models: 900 µF (each output) ±12 VDC models: 133 µF (each output) ±15 VDC models: 90 µF (each output) TYPICAL CHARACTERISTICS Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 page 2/4 WRA-ZD-8W＆WRB-ZD -8W Series Parameter Conditions Min. Output power See below products program 0.6 Positive voltage accuracy Refer to recommended circuit Negative voltage accuracy Typ. Max. Units 6 W ±1 ±3 % Refer to recommended circuit ±3 ±5 % Load regulation Form 10% to 100% load ±0.5 ±2* % Line regulation Input voltage from low to high ±0.2 ±0.5 % Temperature drift (Vout) Refer to recommended circuit ±0.02 Ripple** 20MHz Bandwidth 20 50 mVp-p Noise** 20MHz Bandwidth 50 100 mVp-p Switching frequency 100% load, input voltage range 300 Temperature Derating Graph %/℃ KHz 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. Case material 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 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-8W&WRB_ZD-8W 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≤1.6*Iin-max No parallel connection or plug and play 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 -- -- OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 page 3/4 WRA-ZD-8W＆WRB-ZD -8W Series 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 2、3 GND GND 9 NC 0V 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 3/4