48Vdc Input, 12Vdc@25A Output Quarter-brick Converter AVQ300-48S12B Description The AVQ300-48S12B is a single output DC-DC converter with standard quarter-brick outline and pin configuration. It delivers up to 25A output current with 12V output voltage, which makes it an ideal choice for small space, IBA applications. The converter can achieve ultra high efficiency of 94.5%. For most applications, a heat sink is not required. Operational Features Mechanical Features z Up to 25A output current z Industry standard Quarter-brick pin-out z Industry standard quarter brick foot outline print z Choice of short pins or long pins z Basic isolation z Pin length option: 3.8mm, 4.8mm, 5.8mm z Ultra high efficiency: 94.5% at 12V full load (V =48Vdc) in Safety & EMC z Improved thermal performance z High power density z Meets safety standards UL 60950-1, z Low output noise CSA-C22.2 NO. 60950-1, IEC/EN z No minimum load requirement 60950-1 and GB4943. z wide input voltage of 36V~75V z RoHS compliant z Approved by UL and TUV. z Meets 2006/95/EEC and 93/68/EEC directives which facilitates CE marking in Control Features user’s end product z Meets conducted emission's requirements z Remote control function (negative or of EN55022 Class B with external filter. positive logic optional) z Remote output sense z Trim function: 90% ~ 110% Protection Features z Input under voltage lockout z Output over current protection z Output over voltage protection z Over temperature protection Document NO.: 31020990 September 25, 2009 Rev 1.0 AVQ300-48S12B DC-DC Converter 2/15 Electrical Characteristics Full operating ambient temperature range is -40°C to +85°C. Specifications are subject to change without notice. Parameter Min. Typ. Max. Unit Notes & Conditions Absolute max. ratings Non-operating 100 V 100ms Input voltage Operating 80 V Continuous Operating temperature -40 85 °C Storage temperature -55 125 °C Voltage at remote ON/OFF pin -0.3 12 V Input characteristics Operating input voltage range 36 48 75 V Turn-on voltage 35 36 V threshold Input Turn-off voltage under-voltage 32 34 V threshold lockout Lockout voltage 1 3 V hysteresis Max. input current 12 A 36V , full load in No-load input current 0.2 A Standby Input current 0.01 0.1 A Remote OFF Input reflected ripple current 150 mA Through 12μH inductor; Figure 3 Fast blow external fuse Recommended input fuse 15 A recommended; Figure 10 Input filter component values (C\L) 8.8\1 μF\μH Internal values Recommended external input Low ESR capacitor 100 μF capacitance recommended; Figure 10 Output characteristics Output voltage set point (standard 11.80 12 12.20 V 48V , full load in option) 0.2 % Output voltage line regulation 24 mV 0.2 % Output voltage load regulation 24 mV Output voltage temperature 0.02 %/°C regulation http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 3/15 Parameter Min. Typ. Max. Unit Notes & Conditions Over sample, line, load, Total output voltage range 11.70 12 12.30 V temperature & life Figure 2 Output voltage ripple and noise 150 mVpp 20MHz bandwidth; Figure 14 Operating output current range 0 25 A Hiccup: auto-restart when Output DC current-limit inception 26.25 32.5 A over-current condition is removed High frequency and low ESR is Output capacitance 470 1000 10000 μF recommended Dynamic characteristics Figure 4 50% ~ 75% ~ 50% 600 mV Test condition: 25°C, nominal I , 0.1A/μs o,max input voltage, see Figure 14 Settling time 700 μs Recovery to within 1% V o,nom Dynamic response Figure 5 50% ~ 75% ~ 50% 1200 mV Test condition: 25°C, nominal I , 1A/μs o,max input voltage, see Figure 14 Settling time 700 μs Recovery to within 1% V o,nom Rise time 100 ms Full load, Figure 6 Turn-on Turn-on delay time 150 ms transient Output voltage 5 %V o overshoot Efficiency 100% load 94.5 % Figure 1 50% load 95 % Figure 1 Electrical Characteristics (Continued) Parameter Min. Typ. Max. Unit Notes & Conditions Isolation characteristics Basic insulation, pollution degree 2, 1500 V input to output Isolation voltage (conditions: Basic insulation, pollution degree 2, 1mA for 60s, slew rate of 1500 V input to baseplate 1500V/10s) Functional insulation, pollution degree 500 V 2, output to baseplate EMC characteristics http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 4/15 Parameter Min. Typ. Max. Unit Notes & Conditions ESD B IEC/EN61000-4-2 Level 3 [1] EFT B IEC/EN61000-4-4 Level 3 IEC/EN61000-4-5 [1] Surges B Line to Ground(earth): 600V Line to Line: 600V Conducted disturbances A IEC/EN61000-4-6 Level 2 immunity DC voltage dips, short B EN61000-4-29 interruption, variation Conducted Emission EN55022, DC Input, Class B Feature characteristics Switching frequency 135 145 155 kHz Off-state Remote -0.7 1.2 V voltage ON/OFF control On-state 3.5 12 V (positive logic) voltage See Figure 11 Remote Off-state 3.5 12 V ON/OFF voltage control On-State (negative -0.7 1.2 V Voltage logic) See Trim Characteristics of Output voltage trim range 10.8 13.2 V Application Note Output voltage remote sense 0.6 V range Output over-voltage Hiccup: auto-restart when 125 150 %Vo,nom protection over-voltage condition is removed Auto recovery; Over-temperature shutdown 100 °C OTP test point: see Figure 16 Over-temperature hysteresis 10 °C Reliability characteristics Telcordia SR-332-2006; 80% load, 6 Calculated MTBF (telcordia ) 1.5 10 h 300LFM, 40°C T a Note 1: Criterion A: Normal performance during and after test. Criterion B: Normal performance after test, automatic restart is allowed after test. For EFT and Surges, system reset is no allowed. Criterion C: Normal performance after test, the module can be restarted manually after test. Normal performance means that output noise (Vpp) meet the requirement of the specifications. http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 5/15 Qualification Testing Parameter Unit (pcs) Test condition Halt test 4 ~ 5 T -10°C to T +10°C, 5°C step, V =min to max, 0 ~ 105% load a,min a,max in 2 3 Frequency range: 5Hz ~ 20Hz, 20Hz ~ 200Hz, A.S.D: 1.0m /s , -3db/oct, axes of vibration: X/Y/Z Vibration 3 Time: 30min/axis Mechanical shock 3 30g, 6ms, 3axes, 6directions, 3time/direction Thermal shock 3 -40°C to 100°C, unit temperature 20cycles Thermal cycling 3 -40°C to 55°C, temperature change rate: 1°C/min, cycles: 2cycles Humidity 3 40°C, 95%RH, 48h Solder ability 15 IPC J-STD-002C-2007 Characteristic Curves 100 95 90 85 80 Vin=36V 75 Vin=48V 70 Vin=75V 2.5 5 7.5 10 12. 15 17. 20 22. 25 5 5 5 Output current (A) Figure 1 Efficiency vs. output current, T =25°C, V =12V a o Figure 2 Output ripple & noise (2μs/div, 20mV/div), Figure 3 Input reflected ripple current (100ms/div, see Figure 14 for test configuration 10mA/div), see Figure 14 for test configuration http://www.emersonnetworkpower.com.cn Efficiency (%) AVQ300-48S12B DC-DC Converter 6/15 Figure 4 Dynamic response for 25% load step (50% ~ Figure 5 Dynamic response for 25% load step (50% ~ 75% ~ 50%) and 0.1A/μs slew rate, (2ms/div), see 75% ~ 50%) and 1A/μs slew rate, (2ms/div), see Figure Figure 10 for test configuration; CH2-output voltage 10 for test configuration; CH2-output voltage (200mV/div); CH1-output current (10A/div) (200mV/div); CH1-output current (10A/div) Figure 6 Output voltage startup by power on, Figure 7 Output voltage shut down by power off, (100ms/div), see Figure 10 for test configuration; (50ms/div), see Figure 10 for test configuration; CH2-output voltage (5V/div); CH1-intput voltage CH2-output voltage (5V/div); CH1-input voltage (20V/div) (20V/div) Figure 9 Output voltage shutdown by remote OFF, Figure 8 Output voltage startup by remote ON, (5ms/div), see Figure 10 for test configuration; (100ms/div), see Figure 10 for test configuration; CH2-output voltage (5V/div); CH1-remote OFF voltage CH2-output voltage (5V/div); CH1-remote ON (2V/div) (2V/div) http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 7/15 Application Note Typical Application AVQ300-48S12 EMI filter Fuse In+ Out+ Vin+ Vo+ Vdc C1 C2 C3 Load CNT In- Out- Vin- Vo- Figure 10 Typical application C1: 100μF/100V electrolytic capacitor, P/N: UPM2A101MHD (Nichicon) or equivalent caps C2: 1μF/100V X7R ceramic capacitor, P/N: C3225X7R2A105KT0L0U (TDK) or equivalent caps C3: 1000μF electrolytic capacitor, P/N: UPM1E102MHP (Nichicon) or equivalent caps Note: The converter cannot be used in parallel mode directly! Fuse: External fast blow fuse with a rating of 15A. The recommended fuse model is 0324020 MXP from LITTLEFUSE. Remote ON/OFF The converter is equipped with a primary ON/OFF pin used to remotely turn the converter on or off via a system signal. Two CNT logic options are available. For the positive logic model a system logic low signal will turn the converter off. For the negative logic model a system logic high signal will turn the converter off. For negative logic models where no control signal will be used the ON/OFF pin should be connected directly to -V to ensure proper operation. For positive logic in models where no control signal will be used the ON/OFF pin should be left unconnected. The following figure shows a few simple CNT circuits. CNT CNT -Vin -Vin Transistor control Simple control CNT CNT -Vin -Vin Isolated control Relay control Figure 11 Remote ON/OFF internal diagram http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 8/15 Trim Characteristics Connecting an external resistor between Trim pin and V - pin will decrease the output voltage. o While connecting it between Trim and V + will increase the output voltage. The following equations o determine the external resistance to obtain the trimmed output voltage. 511 R = ( −10.22)kΩ trim−down Δ% 5.11V (100+Δ%) 511 nominal R = ( − − 10.22)kΩ trim−up 1.225Δ% Δ% V − V nominal desired Δ%= ×100 V nominal V norm : Nominal output voltage. When trimming up, the output current should be decreased accordingly so as not to exceed the maximum output power and the minimum input voltage should be increased. Vo+ Vo+ S+ S+ Load Load Rtrim _down Trim Trim Rtrim _up Cout Cout S- S- Vo- Vo- Figure 12 Trim up Figure 13 Trim down Sense Characteristics If the load is far from the unit, connect S+ and S- to the terminal of the load respectively to compensate the voltage drop on the transmission line. See Figure 10. If the sense compensate function is not necessary, connect S+ to V + and S- to V - directly. o o http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 9/15 Input Ripple & Inrush Current And Output Ripple & Noise Test Configuration Current Probe L1 Vo+ Vin+ C1 C2 Cin AVQ300 Load Vdc Vin- Vo- Figure 14 Input ripple & inrush current, ripple & noise test configuration Vdc: DC power supply L1: 12μH Cin: 220μF/100V typical C1: input electrolytic capacitor, according to the same type as C1 in Figure 10 C2: output electrolytic capacitor, according to the same type as C3 in Figure 10 Note: Using a coaxial cable with series 50Ω resistor and 0.68μF ceramic capacitor or a ground ring of probe to test output ripple & noise is recommended. EMC Filter Configuration U2 Resislive load In+ L2 Vo+ L1 Vin+ C1 C2 C3 C6 C7 C4 C5 C12 DC/DC In- Vin- Vo- C8 C9 C10 C11 GND GND Figure 15 EMC test configuration C1~C5: SMD ceramic capacitor -100V-1000nF-X7R-1210 C6: SMD ceramic capacitor -100V-100nF-±10%-X7R-1206 L1, L2: Common mode inductor - single phase -473μH-±25%-14A magnetic ring 1*25.4*12.7mm - working temperature range includes module temperature rise. Temperature rise at rated current: 55°C max C8~C11: High-voltage CHIP ceramic capacitor. Capacitance: 0.1U/630V/X7R. Size: 2220. Capable of withstanding 1kV voltage C7: Input electrolytic capacitor, according to the same type as C1 in Figure 10 C12: Output electrolytic capacitor, according to the same type as C3 in Figure 10 U2: Module to test, AVQ300-48S12B PE: Connected to output (baseplate) http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 10/15 Thermal Considerations The converter is designed to operate in different thermal environments and sufficient cooling must be provided. Proper cooling of the DC-DC converter can be verified by measuring the temperature at the test point. The temperature at this point should not exceed the max values of 100°C. The converter can operate in an enclosed environment without forced air convection. Cooling of the converter is achieved mainly by conduction from the baseplate to a heatsink. The converter can deliver output power at 85°C ambient temperature provided the baseplate temperature is kept below the max values of 100°C. Temperature test point Figure 16 Temperature test point on base plate, air flowing across the converter from pin 1 to pin 3 Test point Temperature limit Test point 100°C The converter can also operate with a smaller heatsink and sufficient airflow. The heatsink is shown in Figure 17. 57.9 4-Ø3.50 4-Ø8.00 36.80 26.21 ± 0.1 47.30 ± 0.1 3.00 12.70 2.00 2.45 3.00 2.45 53.00 (2*10 + 3*11) Figure 17 Heatsink http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 11/15 Figure 18 shows the derating output current vs. ambient air temperature at different air velocity with a heatsink, the heatsink spec is shown in Figure17. The typical test condition is shown in Figure 18. 25 20 15 10 5 25 40 55 70 85 Temperature: Ta ( ) ℃ 400LFM(2m/s) 300LFM(1.5m/s) 200LFM(1m/s) 100LFM(0.5m/s) Figure 18 Output power derating, 48V , air flowing across the converter from pin 1 to pin 3 in http://www.emersonnetworkpower.com.cn Output current Io (A) AVQ300-48S12B DC-DC Converter 12/15 Mechanical Diagram 57.9 [2.280] 50.8[2.000] BOTTOM VIEW 3 4 5 2 6 7 1 8 SIDE VIEW 2-Ø1.5±0.1 6-Ø1.0±0.1 LOAD BOARD 2-Ø2.3±0.1 6-Ø1.6±0.1 TOP VIEW 4-M3 47.2 [1.858] UNIT: mm[inch] BOTTOM VIEW: pin on upside TOLERANCE: X.Xmm±0.5mm[X.X in.±0.02in.] X.XXmm±0.25mm[X.XX in.±0.01in.] Figure 19 Mechanical diagram http://www.emersonnetworkpower.com.cn 12.7[0.500] 36.8 [1.449] L 15.24 [0.600] 26.2 [1.031] 2.0[0.079] 7.62 [0.300] 15.24 [0.600] 3.0[0.118] 0.3[0.012]MIN AVQ300-48S12B DC-DC Converter 13/15 Pin length option Device code suffix L -4 4.8mm±0.25mm -6 3.8mm±0.25mm -8 2.8mm±0.25mm None 5.8mm±0.25mm Pin Designations Pin NO. Name Function 1 V + Positive input terminal in 2 Remote ON/OFF ON/OFF control terminal 3 V- Negative input terminal in 4 V- Negative output terminal o 5 Sense- Negative remote sense 6 Trim Output voltage trim 7 Sense+ Positive remote sense 8 V + Positive output terminal o Soldering The product is intended for standard manual, wave soldering. When wave soldering is used, the temperature on pins is specified to maximum 260°C for maximum 7s. When soldering by hand, the iron temperature should be maintained at 300°C ~ 380°C and applied to the converter pins for less than 10s. Longer exposure can cause internal damage to the converter. Cleaning of solder joint can be performed with cleaning solvent IPA or similative. Assembly： The maximum length of the screw driven into heat-sink is 3.3mm. http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 14/15 Ordering Information AVQ300 - 48 S 12 P B - 4 L ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ① Model series AVQ: high efficiency quarter brick series, 300: output power 300W ② Input voltage 48: 36V ~ 75V input range, rated input voltage 48V ③ Output number S: single output ④ Rated output voltage 12: 12V output ⑤ Remote ON/OFF logic Default: negative; P: positive logic ⑥ baseplated with baseplate ⑦ Pin length -4: 4.8mm±0.25mm ⑧ RoHS status L: RoHS, R6; Y: RoHS, R5 Model number Description 4.8mm pin length; negative on/off logic; without thread inside mounting hole; R6 AVQ300-48S12B-4L compliant 4.8mm pin length; positive on/off logic; without thread inside mounting hole; R6 AVQ300-48S12PB-4L compliant 4.8mm pin length; negative on/off logic; without thread inside mounting hole; R5 AVQ300-48S12B-4Y compliant 4.8mm pin length; positive on/off logic; without thread inside mounting hole; R5 AVQ300-48S12PB-4Y compliant http://www.emersonnetworkpower.com.cn AVQ300-48S12B DC-DC Converter 15/15 Hazardous Substances Announcement (RoHS Of China) Hazardous Substances Parts 6＋ Pb Hg Cd Cr PBB PBDE AVQ300-48S12B ○ ○ ○ ○ ○ ○ ○: Means the content of the hazardous substances in all the average quality materials of the part is within the limits specified in SJ/T-11363-2006 √: Means the content of the hazardous substances in at least one of the average quality materials of the part is outside the limits specified in SJ/T11363-2006 Emerson Network Power Co., Ltd. has been committed to the design and manufacturing of environment-friendly products. It will reduce and eventually eliminate the hazardous substances in the products through unremitting efforts in research. However, limited by the current technical level, the following parts still contain hazardous substances due to the lack of reliable substitute or mature solution: 1. Solders (including high-temperature solder in parts) contain plumbum. 2. Glass of electric parts contains plumbum. 3. Copper alloy of pins contains plumbum http://www.emersonnetworkpower.com.cn