Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 1 AVO75B-36S3V3 66 Watts Eighth-brick Converter Total Power: 66 Watts Input Voltage: 18 to 75 Vdc # of Outputs: Single Special Features • Delivering up to 20A output • Ultra-high efficiency 93% typ. at half load • Wide input range: 18V ~ 75V • Excellent thermal performance • No minimum load requirement • Start-up and shut-down monotonically into any normal and pre-biased loads, internal pre-bias function circuit prevents back negative current drawn from external load • RoHS 6 compliant Product Descriptions The AVO75B-36S3V3 is a single output DC/DC converter with standard eighthbrick form factor and pin configuration. It delivers up to 20A output current with 3.3V output. Above 93% ultra-high efficiency and excellent thermal performance makes it an ideal choice for use in datacom and telecommunication applications and can operate over an ambient temperature range of -40 OC ~ +85 OC. Applications Telecom/ Datacom Safety IEC/EN/UL/ 60950-1 CSA-C22.2 NO. 60950-1 CE Mark UL/TUV Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 2 Model Numbers Standard Output Voltage Structure Remote ON/OFF logic RoHS Status AVO75B-36S3V3-6L 3.3Vdc Open-frame Negative R6 AVO75B-36S3V3B-6L 3.3Vdc Baseplate Negative R6 Ordering information AVO75B - ① 36 S 3V3 P B ② ③ ④ ⑤ ⑥ - ① Model series AVO75B: Standard eighth-brick series ② Input voltage 48: 36V ~ 75V input range, rated input voltage 48V ③ Output number S: single output ④ Rated output voltage 3V3: 3.3V output ⑤ Remote ON/OFF logic Default: negative logic; P: positive logic ⑥ Baseplate B: with baseplate; default: open-frame ⑦ Pin length 6: 3.8mm pin length ⑧ RoHS status L: RoHS, R6 Options None Artesyn Embedded Technologies 6 L ⑦ ⑧ Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 3 Electrical Specifications Absolute Maximum Ratings Stress in excess of those listed in the “Absolute Maximum Ratings” may cause permanent damage to the power supply. These are stress ratings only and functional operation of the unit is not implied at these or any other conditions above those given in the operational sections of this TRN. Exposure to any absolute maximum rated condition for extended periods may adversely affect the power supply’s reliability. Table 1. Absolute Maximum Ratings: Parameter Model Symbol Min Typ Max Unit All All VIN,DC - - 80 100 Vdc Vdc All PO,max - - 66 W - - 2000 1500 1500 Vdc Vdc Vdc Input Voltage Operating -Continuous Non-operating -100mS Maximum Output Power Isolation Voltage1 Input to outputs Input to baseplate Outputs to baseplate Open frame modules Baseplate modules Baseplate modules Ambient Operating Temperature All TA -40 - +85 OC Storage Temperature All TSTG -55 - +125 OC All - - 95 % All -0.7 - 12 Vdc Humidity Operating Voltage at remote ON/OFF pin Note 1 - 1mA for 60s, slew rate of 1500V/10s Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 4 Input Specifications Table 2. Input Specifications: Parameter Conditions¹ Symbol Min Typ Max Unit All VIN,DC 18 36 75 Vdc Turn-on Voltage Threshold IO = IO,max VIN,ON 16.6 17.2 18 Vdc Turn-off Voltage Threshold IO = IO,max VIN,OFF 15.2 15.8 16.6 Vdc Lockout Voltage Hysteresis IO = IO,max 1 - 3 V IIN,max - - 4.5 A No Load Input Current (VO On, IO = 0A, IVSB = 0A) IIN,no_load - - 0.1 A Standby Input Current IIN,standby - - 0.015 A - - 1.5 A2S - - 10 A - 100 - uF Operating Input Voltage, DC Maximum Input Current (IO = IO,max) VIN,DC = 18VDC Inrush Current Transient Rating Recommended Input Fuse Fast blow external fuse recommended Recommended External Input Capacitance Low ESR capacitor recommended CIN Input Reflected Ripple Current Through 12uH inductor - 10 40 mA Input filter component values (C\L) Internal values - 2\2.2 - µF\µH Operating Efficiency TA=25 OC IO = IO,max IO = 50%IO,max - 92 93 - % % η Note 1 - Ta = 25 OC, airflow rate = 400 LFM, Vin = 48Vdc, nominal Vout unless otherwise noted. Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 5 Output Specifications Table 3. Output Specifications: Parameter Condition¹ Symbol Min Typ Max Unit VIN,DC = 36VDC IO=IO,max VO 3.25 3.3 3.35 Vdc Output Voltage Line Regulation All ±%VO - 0.15 0.3 % Output Voltage Load Regulation All ±%VO - 0.3 0.6 % Output Voltage Temperature Regulation All ±%VO - - 0.02 %/OC 3.2 3.3 3.4 V Factory Set Voltage Total output voltage range Over sample, line, load, temperature & life Output Voltage Trim Range All VO 2.64 - 3.63 V Measure with a 1uF ceramic capacitor in parallel with a 10uF tantalum capacitor, 20MHz bandwidth VO - 40 - mVPK-PK Output Current All IO 0 - 20 A Output DC current-limit inception2 All IO 22 25 31 A - - 75 %Vo Output Ripple, pk-pk Vout pre-bias level VO Load Capacitance3 All CO 220 - 10000 uF VO Dynamic Response 50%~75%~50% 25% load change slew rate = 0.1A/us ±VO Ts - 50 70 160 400 mV uSec 50%~75%~50% 25% load change slew rate = 1A/us ±VO Ts - 80 80 400 400 mV uSec Rise time IO = Imax Trise - - 50 mS Turn-on delay time IO = Imax Tturn-on - - 30 mS Output voltage overshoot IO = 0 %VO - - 5 % Peak Deviation Settling Time Turn-on transient Off-state voltage All -0.7 - 1.2 V On-state voltage All 3.5 - 12 V Off-state voltage Remote ON/OFF control (Negative logic) On-state voltage All 3.5 - 12 V All -0.7 - 1.2 V Remote ON/OFF control (Positive logic) Note 1 - Ta = 25 OC, airflow rate = 400 LFM, Vin = 48Vdc, nominal Vout unless otherwise noted. Note 2 - Hiccup: auto-restart when over-current condition is removed. Note 3 - High frequency and low ESR is recommended. Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 6 Output Specifications Table 3. Output Specifications, con’t: Parameter Condition¹ Symbol Min Typ Max Unit Output voltage remote sense range All VO - - 0.165 V Output over-voltage protection4 All VO 3.8 - 4.6 V Output over-temperature protection5 With baseplate Without baseplate All All T T - 115 110 130 125 OC Over-temperature hysteresis All T - 5 - OC f SW 300 310 320 KHz - 1.5 - 106 h Switching frequency MTBF Telcordia SR-332 Method 1 Case3; 80% load, 300LFM, 40 OC TA Note 4 - Hiccup: auto-restart when over-voltage condition is removed. Note 5 - Auto recovery. see Figure 10,11 test point. Artesyn Embedded Technologies OC Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 7 AVO75B-36S3V3 Performance Curves Figure 1: AVO75B-36S3V3 Input Reflected Ripple Current Waveform Figure 2: AVO75B-36S3V3 Ripple and Noise Measurement Ch 1: Iin (5uS/div, 10mA/div) Ch 1: Vo (5uS/div, 20mV/div) Figure 3:AVO75B-36S3V3 Output Voltage Startup Characteristic (50mS/div) Figure 4: AVO75B-36S3V3 Turn Off Characteristic (2mS/div) Ch 1: Vo (1V/div) Ch 1: Vo (1V/div) Figure 5: AVO75B-36S3V3 Remote ON Waveform (100mS/div) Figure 6: AVO75B-36S3V3 Remote OFF Waveform (50mS/div) Ch 1: Vo (1V/div) Ch 1: Vo (1V/div) Ch 2: Vin (20V/div) Ch 2: Remote ON (2V/div) Artesyn Embedded Technologies Ch 2: Vin (20V/div) Ch2: Remote OFF (2V/div) Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 8 AVO75B-36S3V3 Performance Curves Figure 7: Figure 8: Ch 1: Vo AVO75B-36S3V3 Transient Response (2mS/div) 50%~75%~50% load change, 1A/uS slew rate (50mV/div) Ch 2: Io (5A/div) Efficiency (%) Ch 1: Vo AVO75B-36S3V3 Transient Response (2mS/div) 50%~75%~50% load change, 0.1A/uS slew rate, (50mV/div) Ch 2: Io (5A/div) Figure 9: AVO75B-36S3V3 Efficiency Curves @ 25 OC Loading: Io = 10% increment to 20A Figure 11: AVO75B-36S3V3B OTP Test Point Artesyn Embedded Technologies Figure 10: AVO75B-36S3V3 OTP Test Point Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 9 Mechanical Specifications Mechanical Outlines – Base plate Module AVO75B-36S3V3B . Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 10 Mechanical Outlines – Open-Frame Module AVO75B-36S3V3 . Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 11 Pin Length Option Device code suffix L -4 4.8mm±0.2 mm -6 3.8mm±0.2 mm -8 2.8mm±0.2 mm None 5.8mm±0.2 mm Pin Designations Pin No Name Function 1 Vin+ Positive input voltage 2 Remote On/Off Remote control 3 Vin- Negative input voltage 4 Vo- Negative output voltage 5 S- Negative remote sense 6 Trim Output voltage trim 7 S+ Positive remote sense 8 Vo+ Positive output voltage Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 12 Environmental Specifications EMC Immunity AVO75B-36S3V3 power supply is designed to meet the following EMC immunity specifications: Table 4. Environmental Specifications: Regulations Test Item Criteria EN 55022 DC input port, Class A Limits Conducted Emission N/A IEC/EN61000-4-2 Enclosure Port, Level 3 Immunity to Electrostatic Discharge B IEC/EN61000-4-4 DC input port, Level 3 Immunity to Electrical Fast Transient B IEC/EN61000-4-5 DC input port Line to Ground(earth): 600V Line to Line: 600V Immunity to Surges B IEC/EN61000-4-6 DC input port, Level 2 Immunity to Continuous Conducted Interference A EN 61000-4-29 DC input port Immunity To Voltage Dips and short interruptions and voltage variations B Criterion A: Normal performance during and after test. Criterion B: For EFT and surges, low-voltage protection or reset is not allowed. Temporary output voltage fluctuation ceases after disturbances ceases, and from which the EUT recovers its normal performance automatically. For Dips and ESD, output voltage fluctuation or reset is allowed during the test, but recovers to its normal performance automatically after the disturbance ceases. Criterion C: Temporary loss of output, the correction of which requires operator intervention. Criterion D: Loss of output which is not recoverable, owing to damage to hardware. Recommend EMC test conditions See Figure 27 Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 13 Safety Certifications The AVO75B-36S3V3 power supply is intended for inclusion in other equipment and the installer must ensure that it is in compliance with all the requirements of the end application. This product is only for inclusion by professional installers within other equipment and must not be operated as a stand alone product. Table 5. Safety Certifications for AVO75B-36S3V3 power supply system Document File # Description UL/CSA 60950 US and Canada Requirements EN60950 European Requirements IEC60950 International Requirements GB4943 China Requirements CE CE Marking Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 14 Operating Temperature The AVO75B-36S3V3 series power supplies will start and operate within stated specifications at an ambient temperature from -40 OC to 85 OC under all load conditions. The storage temperature is -40 OC to 85 OC. Thermal Considerations – Open-Frame module The converter is designed to operate in different thermal environments and sufficient cooling must be provided. Proper cooling can be verified by measuring the temperature at the test points as shown in the Figure 12. The temperature at these test points should not exceed the maximum values in Table 6. For a typical application, forced airflow direction is from pin 3 to pin1. Figure 13, 14 shows the derating of output current vs. ambient air temperature at different air velocity. Figure 15 shows the thermal image taken by a RF camera at a rated I/O condition. . Figure 12 Temperature test point Table 6. Temperature limit of the test point . Test Point Temperature Limit P1 125 OC P2 125 OC Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 15 . . . Figure 13 Output power derating, 24Vin， Figure 14 Output power derating, 48Vin Figure 15 Thermal image, 36Vin, 3.3Vo, full load, room temperature, 100LFM (air flowing from pin 3 to pin 1) Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 16 Thermal Considerations –Baseplate module The converter is designed to operate in different thermal environments and sufficient cooling must be provided. Proper cooling can be verified by measuring the temperature at the test points as shown in Figure 16. The temperature at these points should not exceed the maximum values in Table 7. . Figure 16 Temperature test point Table 7. Temperature limit of the test point Test Point Temperature Limit P1 113 OC P2 112 OC P3 110 OC The converter can also operate with a smaller heatsink and sufficient airflow. Figure 18, 19 show the derating output current vs. ambient air temperature at different air velocity with a specified heatsink. The typical test condition is shown in Figure 17. For a typical application, forced airflow direction is from Vin- to Vin+. Figure 20 shows the thermal image taken by a RF camera at a rated I/O condition. Figure 17 Typical test condition, heatsink size (L*W*H): 57.9mm * 22.86mm * 6.3mm Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 17 . . . Figure 18 Output power derating, 24Vin， Figure 19 Output power derating, 48Vin Figure 20 Thermal image, 36Vin, 3.3Vo, full load, room temperature, 100LFM (air flowing from pin 3 to pin 1) Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 18 Qualification Testing Parameter Unit (pcs) Test condition Ta,min-10 OC to Ta,max+10 OC, 5 OC step, Vin = min to max, 0 ~ 105% load Halt test 4-5 Vibration 3 Frequency range: 5Hz ~ 20Hz, 20Hz ~ 200Hz, A.S.D: 1.0m2/s3, -3db/oct, axes of vibration: X/Y/Z. Time: 30min/axis Mechanical Shock 3 30g, 6ms, 3axes, 6directions, 3time/direction Thermal Shock 3 -40 OC to 100 OC, unit temperature 20cycles Thermal Cycling 3 -40 OC to 85 OC, temperature change rate: 1OC/min, cycles: 2cycles Humidity 3 40 OC, 95%RH, 48h Solder Ability 15 IPC J-STD-002C-2007 Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 19 Application Notes Typical Application Below is the typical application of the AVO75B-36S3V3 series power supply. Figure 21 Typical application Recommended input fuse: 0314010.MXP from LITTELFUSE FAR EAST PTE LTD. C1: 100µF/100V electrolytic capacitor, P/N: UPM2A101MPD (Nichicon) or equivalent caps C2, C3: 1µF/100V X7R ceramic capacitor, P/N: C3225X7R2A105KT0L0U (TDK) or equivalent caps C4: 470µF/25V electrolytic capacitor, P/N: UPM1E471MED (Nichicon) or equivalent caps Note: If ambient temperature is below -5 OC,additional 220µF tantalum capacitor (Low ESR, ESR≤100mΩ) is needed for output.. Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 20 Remote ON/OFF Either positive or negative remote ON/OFF logic is available in AVO75B-36S3V3. The logic is CMOS and TTL compatible. Below is the detailed internal circuit and reference in AVO75B-36S3V3. 11V Remote ON/OFF +Vin Remote ON/OFF 33K 20K 64.9k PWM Controller 4.22k PWM controller 470PF Negative logic 10K 2200pF Positive logic Figure 22 Remote ON/OFF internal diagram The voltage between pin Remote ON/OFF and pin Vin- must not exceed the range listed in table “Feature characteristics” to ensure proper operation. The external Remote ON/OFF circuit is highly recommended as shown in Figure 23.. Isolated remote ON/OFF circuit Non-isolated remote ON/OFF circuit Figure 23 External Remote ON/OFF circuit Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 21 Trim Characteristics Connecting an external resistor between Trim pin and Vo- pin will decrease the output voltage. While connecting it between Trim and Vo+ will increase the output voltage. The following equations determine the external resistance to obtain the trimmed output voltage. Radj −down = Radj −up = 510 − 10.2( KΩ) ∆ 5.1 × Vnom × (100 + ∆ ) 510 − − 10.2( KΩ) 1.225 × ∆ ∆ △:Output e rate against nominal output voltage. ∆= 100 × (Vnom − V0 ) Vnom Vnom: Nominal output voltage. For example, to get 3.65V output, the trimming resistor is ∆= 100 × (V nom − V0 ) 100 × (3.63 − 3.3) = = 10 Vnom 3.3 Radj −up = 5.1 × 3.3 × (100 + 10 ) 510 − − 10.2 = 89.9( KΩ) 1.225 × 10 10 The output voltage can also be trimmed by potential applied at the Trim pin VO = (Vtrim + 1.225) × 1.347 Where Vtrim is the potential applied at the Trim pin, and Vo is the desired output voltage. When trimming up, the output current should be decreased accordingly so as not to exceed the maximum output power. Figure 24 Trim up Artesyn Embedded Technologies Figure 25 Trim down Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 22 Input Ripple & Inrush Current and Output Ripple & Noise Test Configuration Figure 26 Input ripple & inrush current output ripple & noise test configuration Vdc: DC power supply L1: 12uH Cin: 220uF/100V typical C1 ~ C4: see Figure 21 Note - Using a coaxial cable with series 50ohm resistor and 0.68uF ceramic capacitor or a ground ring of probe to test output ripple & noise is recommended Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 23 EMC test conditions Figure 27 EMC test configuration U1: Input EMC filter U2: Module to test, AVO75B-36S3V3 C1 ~ C4: see Figure 21 Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 24 Sense Characteristics If the load is far from the unit, connect S+ and S- to the terminals of the load respectively to compensate the voltage drop on the transmission line. see Figure 21. If the sense compensation function is not necessary, connect S+ to Vo+ and S- to Vo- directly. Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 25 Soldering The product is intended for standard manual or wave soldering. When wave soldering is used, the temperature on pins is specified to maximum 255 OC for maximum 7s. When soldering by hand, the iron temperature should be maintained at 300 OC ~ 380 OC 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. . Artesyn Embedded Technologies Technical Reference Note Rev.02.06.15_#1.2 AVO75B-36S3V3 Page 26 Hazardous Substances Announcement (RoHS of China R6) Parts Hazardous Substances Pb Hg Cd Cr6+ PBB PBDE AVO75B-36S3V3 x x x x x x AVO75B-36S3V3B x x x x x x х: 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 Artesyn Embedded Technologies 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 For more information: www.artesyn.com/power For support: [email protected]