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| Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) AEO/ALO Single Output 8th Brick: Baseplate or Open-Frame Module The AEO_ALO04/12/20/25x48 series is Astec's Low Current 8th Brick industry standard offering. Operating from an input voltage range of 36V to 75V, the series provides 7 configured outputs starting from 1.2V all the way up to 12V. It delivers up to 25A max current for 1.8V and lower voltages at impressive levels of efficiency. It provides tight regulation and exhibits clean and monotonic output start up characteristics. The AEO_ALO series comes with industry standard features such as Input UVLO; non-latching OCP, OVP and OTP; Output Trim; Differential Remote Sense pins. Both baseplate (AEO) and open frame (ALO) construction are available as well as TH and SMT termination. With its wide operating temperature range of -40C to 85C ambient, the converters are deployable into almost any environment. Electrical Parameters Input Input Range Input Surge 36-75 VDC 100V / 100ms Control Enable TTL compatible (Positive or Negative Logic Enable Options) Output Load Current Line/Load Regulation Ripple and Noise Output Voltage Adjust Range Transient Response Remote Sense Over Current Protection Over Voltage Protection Over Temperature Protection Up to 25A max (VO 1.8V) < 1% VO 20mVP-P typical at 1.8V 10% VO 2% Typical deviation 50% to 75% step load 250s settling time (Typ) +10%VO 120% (Typ) 130% (Typ) 110 C Special Features * * * * * * * * Industry Standard 8 Brick Footprint Baseplate or Open frame construction Low Ripple and Noise Regulation to zero load High Capacitive Load Start-up Fixed Switching Frequency Industry standard features: Input UVLO; Enable; non-latching OVP, OCP and OTP; Output Trim, Differential Remote Sense Meets Basic Insulation th Environmental Specifications * * * -40C to 85C Operating Temperature -55C to 125C Storage Temperature MTBF > 1 million hours Safety UL + cUL 60950, Recognized EN60950 through TUV-PS MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 1 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Electrical Specifications ABSOLUTE MAXIMUM RATINGS Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional operation of the device is converter is not implied at these or any other conditions in excess of those given in the operational section of the specs. Exposure to absolute maximum ratings for extended period can adversely affect device reliability. Parameter Input Voltage Continuous Transient (100ms) I/O Isolation Input-to-Output Operating Temperature Storage Temperature Operating Humidity Max Voltage at Enable Pin Max Output Power 1 Device All Symbol Vin Vin trans TA TSTG PO, MAX Min -0.3 1500 -40 -55 10 -0.6 - Typical - Max 75 100 85 125 85 25 48.0 60.0 66.0 50.0 45.0 37.5 30.0 Unit Vdc All All All All All B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) Vdc C C % Vdc W INPUT SPECIFICATIONS Parameter Operating Input Voltage Range Input Under-Voltage Lock-out T_ON Threshold T_OFF Threshold Max Input Current2 Device All All B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) Iinmax Symbol VIN Min 36 33 31 Typical 48 34 32 Max 75 36 34 1.7 2.3 2.4 1.9 1.8 1.6 1.4 5.75 4.00 4.00 4.00 3.00 2.50 2.00 Unit Vdc Vdc A Standing Loss Vin = Vinnom W MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 2 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Electrical Specifications (continued) INPUT SPECIFICATIONS Parameter Input Ripple Current3 Inrush Current i2t OUTPUT SPECIFICATIONS Parameter Output Voltage Set point VIN = VIN, MIN to VIN, MAX IO = IO, MAX Device B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) All Symbol VO, SET Min 11.80 4.90 3.25 2.45 1.76 1.47 1.17 Typical 12.00 5.00 3.30 2.50 1.80 1.50 1.20 0.1 0.1 0.5 Max 12.20 5.10 3.35 2.55 1.84 1.53 1.23 0.2 0.5 1.0 Unit Vdc Device All All Symbol II1 Min Typical 10 0.01 Max 20 Unit mAp-p A 2s Output Regulation Line VIN = VIN, MIN to VIN, MAX Load VIN = VIN, NOM IO = IO, MIN to IO, MAX Temp VIN = VIN, NOM; IO = IO, MAX4 Output Current4 - % Output Ripple and Noise5 Peak-to-Peak IO = IO, MAX; VIN =VIN, N OM BWL = 20 MHz; TA =25oC B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2)) IO - 0 0 0 0 0 0 0 - 50 40 40 20 20 20 20 4 12 20 20 25 25 25 120 90 75 75 60 60 60 A mVp-p MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 3 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Electrical Specifications (continued) OUTPUT SPECIFICATIONS Parameter Output Current-limit Inception VO = 90% VO, NOM; TA = 25C VIN = VIN, NOM Non-latching / auto-recovery Device B (12V0) A (5V0) F (3V3) G (2V5) Y (1V8) M (1V5) K (1V2) All B (12V0) Symbol IO, OCP Min 5.0 16.0 23.5 23.5 27.0 27.0 27.0 4 92.0 92.0 90.0 89.0 88.5 87.0 85.0 13.8 5.80 3.80 2.90 2.10 1.75 1.38 110 110 380 90 Typical Max 7.8 23.9 30.0 30.0 48.0 48.0 48.0 10,000 1,500 94.0 94.0 93.0 92.0 91.0 90.5 88.0 15.0 6.20 4.30 3.20 2.50 2.38 1.80 120 120 17 20 17 20 9 11 16 520 10 110 3 Unit A External Load Capacitance IO = IO, MAX , resistive load Capacitor ESR Efficiency VIN = VIN, NOM; IO = IO, MAX TA = 25C CEXT F m % B (12V) A (5.0V) F (3.3V) G (2.5V) Y (1.8V) M (1.5V) K (1.2V) B (12V) A (5.0V) F (3.3V) G (2.5V) Y (1.8V) M (1.5V) K (1.2V) AEO ALO All 5V, 12V All VO, OVP 93.0 93.0 91.0 90.0 90.0 88.5 87.0 14.4 6.00 4.00 3.00 2.30 1.85 1.50 3 4 9 450 0 Output Over Voltage Protection Non-latching / autorecovery V Over Temperature Protection Input to Output Turn-On Delay VIN = VIN, NOM IO = IO, MAX Enable to Output Turn-On Delay VIN = VIN, NOM IO = IO, MAX Output Voltage Rise Time 10% to 90% of VO VIN = VIN, NOM IO = IO, MAX Switching Frequency Output Voltage Remote Sensing Output Voltage Trim Range6 Output Voltage Overshoot C ms ms FSW - All 5V 12V All All All All ms kHz %VO %VO %Vo MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 4 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Electrical Specifications (continued) OUTPUT SPECIFICATIONS Parameter Dynamic Response di/dt = 0.1 A/s Peak Deviation IO = 50% to 75% of Iomax Settling Time Vref = Vonom Peak Deviation IO = 50% to 25% of Iomax Settling Time Vref = Vonom Output Enable ON/OFF Open collector TTL compatible Positive Enable: Mod-ON Mod-OFF Negative Enable: Mod-ON Mod-OFF Device Symbol Min Typical Max Unit All All All All - - 2 2 - 5 250 5 250 % s % s All All All All - 2.95 -0.5 -0.5 2.95 - 20 1.20 1.20 20 V V V V Note: 1. Derating curves for both openframe and baseplate modules are based on derated component junction temperatures of 120C or less where applicable. 2. An input line fuse is recommended for use (e.g. Littlefuse type 314 - 4A max, 250V min or equivalent). 3. Refer to Figure 1 for Input Ripple Current test measurement setup. 4. Output derating applies at elevated temperature. 5. Refer to Figure 2 for output ripple measurement setup. 6. Refer to the output trim equations provided (Equations 1 and 2). SAFETY AGENCY / MATERIAL RATING / ISOLATION Parameter Safety Approval Material Flammability Rating Parameter Input to Output Capacitance Input to Output Resistance Input to Output Insulation Type Device All All Device All All All UL/cUL 60950, 3rd Edition - Recognized EN 60950 through TUV UL94V-0 Symbol Min Typical Max 1000 TBD Basic - Unit pF Ohms - MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 5 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Electrical Specifications (continued) TO OSCILLOSCOPE Ltest 12 uH BATTERY Cs 220 uF ESR < 0.1 OHM @ 20 C, 100 kHz 33 uF ESR < 0.7 OHM @ 20 C, 100 kHz Vi(+) Vi(-) Measure input reflected-ripple current with a simulated source inductance (Ltest) of 12uH. Capacitor Cs offsets possible battery impedance. Measure current as shown above. Figure 1. Input Reflected Ripple Current Measurement Setup. COPPER STRIP Vo(+) 0.1 uF Vo(-) 10 uF SCOPE RESISTIVE LOAD Use a 0.1F @50V X7R ceramic capacitor (connected an inch away from the output terminals of the UUT) and a 10F @ 25V tantalum capacitor (2 inches away from the output terminals of the UUT). Scope measurement should be made using a BNC socket, positioned 3 inches away from output terminals of the converter. Figure 2. Peak to Peak Output Noise Measurement Setup. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 6 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Basic Operation and Features INPUT UNDER VOLTAGE LOCKOUT To prevent any instability to the converter, which may affect the end system, the converter have been designed to turn-on once VIN is in the voltage range of 33 to 36VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 31 to 34VDC OUTPUT VOLTAGE ADJUST/TRIM The converter comes with a TRIM pin (PIN 6), which is used to adjust the output by as much as 90% to 110% of its set point. This is achieved by connecting an external resistor as described below. To INCREASE the output, external Radj_up resistor should be connected between TRIM PIN (Pin6) and +SENSE PIN (Pin 7). Please refer to Equation (1) for the required external resistance and output adjust relationship. Equation (1a): 1.5V to 12V Radj_up = -Vin -Vout -Sense Enable Vadj Rload Radj_up +Sense +Vin +Vout 5.1 x Voset x ( 100 + %) 510 - - 10.2 % 1.225 x % Figure 3. External resistor configuration to increase the outputs Equation (1b): 1.2V Radj_up = 5.1 x Voset x ( 100 + %) 510 - - 10.2 % 0.6 x % To DECREASE the output, external Radj_down resistor should be connected between TRIM pin (Pin 6) and -SENSE PIN (Pin 5). Please refer to Equation (2) for the required external resistance and output adjust relationship. Equation (2): Radj_down -Vin -Vout -Sense Radj_down Enable Vadj +Sense Rload 510 - 10.2 k % +Vin +Vout Where: % = percent change in output voltage Figure 4. External resistor configuration to increase the outputs MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 7 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Basic Operation and Features (continued) OUTPUT ENABLE The converter comes with an Enable pin (PIN 2), which is primarily used to turn ON/OFF the converter. Both a Positive (no "N" suffix required) and a Negative (suffix "N" required) Enable Logic options are being offered. Please refer to Table 2 for the Part Numbering Scheme. For Positive Enable, the converter is turned on when the Enable pin is at logic HIGH or left open. The unit turns off when the Enable pin is at logic LOW or directly connected to -VIN. On the other hand, the Negative Enable version turns unit on when the Enable pin is at logic LOW or directly connected to -VIN. The unit turns off when the Enable pin is at Logic HIGH. OUTPUT OVER VOLTAGE PROTECTION (OVP) The Over Voltage Protection circuit is non-latching - auto recovery mode. The output of the converter is terminated under an OVP fault condition (Vo > OVP threshold). The converter will attempt to restart until the fault is removed. There is a 100ms lockout period between restart attempts. OVER CURRENT PROTECTION (OCP) The Over Current Protection is non-latching - auto recovery mode. The converter shuts down once the output current reaches the OCP range. The converter will attempt to restart until the fault is removed. There is a 100ms lockout period between restart attempts. OVER TEMPERATURE PROTECTION (OTP) The Over Temperature Protection circuit will shutdown the converter once the average PCB temperature (See Figure 62B for OTP reference sense point) reaches the OTP range. This feature prevents the unit from overheating and consequently going into thermal runaway, which may further damage the converter and the end system. Such overheating may be an effect of operation outside the given power thermal derating conditions. Restart is possible once the temperature of the sensed location drops to less than 110C. REMOTE SENSE The remote sense pins can be used to compensate for any voltage drops (per indicated max limits) that may occur along the connection between the output pins to the load. Pin 7 (+Sense) and Pin 5 (-Sense) should be connected to Pin 8 (+Vout) and Pin 4 (Return) respectively at the point where regulation is desired. The combination of remote sense and trim adjust cannot exceed 110% of VO. When output voltage is trimmed up (through remote sensing and/or trim pin), output current must be derated and maximum output power must not be exceeded. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 8 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 12V @ 4A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] Pow er Dissipation vs. Output Current, TA=25C 8 7 6 5 4 3 2 1 0 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 1 2 3 Output Current [A] 4 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 0 1 2 Output Current [A] 3 4 Figure 5. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 6. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 7. 12VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 8. 12VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 9 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 12V @ 4A (continued) Figure 9. Transient Response at TA = 25C, 12VOUT Deviation (Hi-Lo). Figure 10. Transient Response at TA = 25C, 12VOUT Deviation (Lo-Hi). ALO04B48N @ 48Vin 4 AEO04B48N @ 48Vin 4 Output Current (A) 2 0LFM 1 00LFM 200LFM 300LFM 400LFM Output Current (A) 3 3 2 400 LFM 300LFM 200 LFM 1 LFM 00 0 LFM 1 1 0 25 40 55 70 Am bient Tem perature (C) 85 0 25 40 55 70 Am bient Tem perature (C) 85 Figure 11. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. Figure 12. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 10 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 5V @ 12A Efficiency vs. Output Current, TA=25C 95% 90% 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 2 4 6 8 Output Current [A] 10 12 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 6 5 Power Dissipation [W] 4 3 2 1 0 0 2 4 6 8 Output Current [A] 10 12 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 13. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 14. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 15. 5VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 16. 5VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 11 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 5V @ 12A (continued) Figure 17. Transient Response at TA = 25C, 5VOUT Deviation (Hi-Lo). Figure 18. Transient Response at TA = 25C, 5VOUT Deviation (Lo-Hi). ALO12A48N @ 48Vin 12 10 Output Current (A) 8 6 4 2 0 25 0 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM AEO12A48N @ 48Vin 12 10 Output Current (A) 8 6 4 2 0 0 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM 40 55 70 Am bient Tem perature (C) 85 25 40 55 70 Am bient Tem perature (C) 85 Figure 19. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. Figure 20. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 12 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 3.3V @ 20A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 4 8 12 Output Current [A] 16 20 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 8 6 4 2 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 0 0 4 8 12 Output Current [A] 16 20 Figure 21. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 22. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 23. 3.3VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 24. 3.3VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 13 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 3.3V @ 20A (continued) Figure 25. Transient Response at TA = 25C, 3.3VOUT Deviation (Hi-Lo). Figure 26. Transient Response at TA = 25C, 3.3VOUT Deviation (Lo-Hi). ALO20F48N @ 48 Vin 20 16 Output Current (A) AEO20F48N @ 48 Vin 20 16 Output Current (A) 12 8 4 0 75 85 0 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM 12 8 4 0 25 35 45 55 65 Am bient Tem perature (C) 0 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM 25 35 45 55 65 75 85 Am bient Tem perature (C) Figure 27. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. Figure 28. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 14 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 2.5V @ 20A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 5 10 15 Output Current [A] 20 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 8 7 6 5 4 3 2 1 0 0 5 10 15 Output Current [A] 20 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 29. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 30. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 31. 2.5VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 32. 2.5VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 15 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 2.5V @ 20A (continued) Figure 33. Transient Response at TA = 25C, 2.5VOUT Deviation (Hi-Lo). Figure 34. Transient Response at TA = 25C, 2.5VOUT Deviation (Lo-Hi). ALO20G48N @ 48Vin 20 AEO20G48N @ 48Vin 20 Output Current (A) 10 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM Output Current (A) 15 15 10 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM 5 5 0 25 40 55 70 Am bient Tem perature (oC) 85 0 25 40 55 70 Am bient Tem perature (oC) 85 Figure 35. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. Figure 36. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 16 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.8V @ 25A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 8 7 6 5 4 3 2 1 0 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 37. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 38. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 39. 1.8VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 40. 1.8VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 17 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.8V @ 25A (continued) Figure 41. Transient Response at TA = 25C, 1.8VOUT Deviation (Hi-Lo). Figure 42. Transient Response at TA = 25C, 1.8VOUT Deviation (Lo-Hi). ALO25Y48N @ 48Vin 25 20 15 10 5 0 25 40 55 70 Am bient Tem perature (C) 85 000 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM AEO25Y48N @ 48Vin 25 20 15 10 5 0 25 40 55 70 85 Am bient Tem perature (C) 000 LFM 1 LFM 00 200 LFM 300 LFM 400 LFM Output Current (A) Figure 43. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G Output Current (A) Figure 44. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. SHEET 18 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.5V @ 25A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 8 7 6 5 4 3 2 1 0 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 45. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 46. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 47. 1.5VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 48. 1.5VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 19 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.5V @ 25A (continued) Figure 49. Transient Response at TA = 25C, 1.5VOUT Deviation (Hi-Lo). Figure 50. Transient Response at TA = 25C, 1.5VOUT Deviation (Lo-Hi). ALO25M48N @ 48Vin 25 20 15 10 5 0 25 40 55 70 o Am bient Tem perature ( C) 85 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM AEO25M48N @ 48Vin 25 20 15 10 5 0 25 40 55 70 o Am bient Tem perature ( C) 85 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM Output Current (A) Figure 51. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G Output Current (A) Figure 52. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. SHEET 20 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.2V @ 25A Efficiency vs. Output Current, TA=25C 95% 90% Power Dissipation [W] 85% Efficiency [%] 80% 75% 70% 65% 60% 55% 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Pow er Dissipation vs. Output Current, TA=25C 8 7 6 5 4 3 2 1 0 0 5 10 15 Output Current [A] 20 25 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 53. Efficiency vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 54. Power Dissipation vs. Load Current at IO = Full Load, TA = 25C (ambient temperature). Figure 55. 1.2VOUT Startup Characteristic at VIN = 48Vdc, IO = Full Load, TA = 25C. Figure 56. 1.2 VOUT Ripple Waveform at VIN = 48Vdc, IO = Full Load, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 21 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Performance Curves 1.2 V @ 25A (continued) Figure 57. Transient Response at TA = 25C, 1.2VOUT Deviation (Hi-Lo). Figure 58. Transient Response at TA = 25C, 1.2VOUT Deviation (Lo-Hi). ALO25K48N @ 48Vin 25 20 15 10 5 0 25 40 55 70 85 Am bient Tem perature ( oC) 25 20 Output Current (A) 15 10 5 0 25 AEO25K48N @48Vin Output Current (A) 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM 400 LFM 300 LFM 200 LFM 1 LFM 00 0 LFM 40 55 70 Am bient Tem perature ( oC) 85 Figure 59. Output Current vs. Temperature for open frame version at VIN = 48Vdc, TA = 25C. Figure 60. Output Current vs. Temperature for baseplate version at VIN = 48Vdc, TA = 25C. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 22 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Input Filter for FCC Class B Conducted Noise A reference design for an input filter that can provide FCC Class B conducted noise levels is shown below (See Figure 61). Two common mode connected inductors are used in the circuit along with balanced bypass capacitors to shunt common mode currents into the ground plane. Shunting noise current back to the converter reduces the amount of energy reaching the input LISN for measurement. The application circuit shown has an earth ground (frame ground) connected to the converter output (-) terminal. Such a configuration is common practice to accommodate safety agency requirements. Grounding an output terminal results in much higher conducted emissions as measured at the input LISN because a hard path for common mode current back to the LISN is created by the frame ground. "Floating" loads generally result in much lower measured emissions. The electrical equivalent of a floating load, for EMI measurement purposes, can be created by grounding the converter output (load) through a suitably sized inductor(s) while maintaining the necessary safety bonding. FILTER PARTS LIST CKT CODE Common Mode Choke X-Cap Y-Cap Cin DESCRIPTION CTX01-15091 Cooper Electronic Technologies 0.47 F X 4pcs 22 nF X 4 pcs 220F X 1pc Figure 61: Class B Filter Circuit MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 23 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Mechanical Specifications Parameter Dimension Device All AEO ALO Weight PIN ASSIGNMENT 1 2 3 4 AEO ALO +VIN ENABLE -VIN -Vo Symbol L W H H Min Typ 2.30 [58.42] 0.90 [22.90] 34.02 [1.2] 22.68 [0.8] 5 6 7 8 Max 0.40 [10.1] 0.32 [8.2] -SENSE TRIM +SENSE +Vo Unit in [ mm ] in [ mm ] in [ mm ] g [oz] g [oz] 2.30 [58.4] 2.30 [58.4] + Vin 0.90 [22.9] E - Vin + Output + Sense Trim -Sense -Output + Vin 0.90 [22.9] E - Vin + Output + Sense Trim -Sense -Output PIN SIDE DOWN 0.32 [8.2] PIN SIDE DOWN 0.15 [3.9] 0.31 [7.9] 0.15 [3.8] 0.45 [11.4] 0.15 [3.8] 2.00 [50.8] 0.30 [7.6] 2.19 [55.5] 0.15 [3.8] 0.45 [11.4] 0.75 [19.0] 0.15 [3.8] 0.30 [7.6] 0.75 [19.0] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] THRU-HOLE SURFACE MOUNT Figure 62A. ALO (Openframe) Mechanical outline. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 24 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) Mechanical Specifications (continued) Mechanical Specifications 2.30 [58.4] 2.30 [58.4] + Vin 0.90 [22.9] E - Vin + Output + Sense Trim -Sense -Output + Vin 0.90 [22.9] E - Vin + Output + Sense Trim -Sense -Output PIN SIDE DOWN 0.40 [10.1] 0.23 [5.8] OTP Reference Sense Points: Vicinity of Pin 2 (Enable Pin) PIN SIDE DOWN 0.15 [3.9] 0.39 [9.8] 0.15 [3.8] 0.45 [11.4] 0.75 [19.0] 2.00 [50.8] 0.15 [3.8] 0.30 [7.6] 0.15 [3.8] 0.15 [3.8] 0.45 [11.4] 2.19 [55.5] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.0] 0.75 [19.1] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] THRU-HOLE SURFACE MOUNT Figure 62B. (Baseplate) Mechanical Outline Figure 63. Recommended Pad layout for SMT (Suffix "S") version. MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 25 OF 26 Technical Reference Notes AEO_ALO04/12/20/25x48 Series (Single Output 8th Brick) SOLDERING CONSIDERATIONS 240 RECOMMENDED REFLOW PROFILE 220 200 TEMPERATURE (deg C) The AEO (baseplate) series converters are compatible with standard wave soldering techniques. When wave soldering, the converter pins should be preheated for 20-30 seconds at 110C and wave soldered at 260C for less than 10 seconds. When hand soldering, the iron temperature should be maintained at 425C and applied to the converter pins for less than 5 seconds. Longer exposure can cause internal damage to the converter. Cleaning can be performed with cleaning solvent IPA or with water. For SMT terminated modules, refer to Figure 64 for the recommended reflow profile. PEAK TEMPERATURE 200C - 230C 183C REFLOW ZONE 110C 120 - 180 sec PRE-HEAT ZONE SLOPE < 4C /sec < 80 sec 180 160 140 120 100 80 60 40 20 0 0 30 60 90 120 150 180 210 240 270 300 TIME (seconds) Figure 64. Recommended reflow profile for SMT modules. TABLE 2: PART NUMBERING SCHEME CONSTRUCTION O/P CURRENT O/P VOLTAGE Vin Enable PIN LENGTH TERMINATION A w L = Open frame E = Baseplate O xx 04 = 4A 12 = 12A 20 = 20A 20 = 20A 25 = 25A 25 = 25A 25 = 25A y B =12V A =5V F =3.3V G =2.5V Y =1.8V M =1.5V K =1.2V 48 N N = Negative Blank = Positive - 6 6 = 3.7mm blank = 5mm default S S = SMT Termination Blank = thru-hole Note: 1) For Through Hole termination: - Std pin length is 5mm nominal (min: 0.189 [4.8]; max: 0.205 [5.2] / in [mm]) - "-6" option is 3.7mm nominal (min: 0.137 [3.5]; max: 0.152 [3.9] / in [mm]) - Pins 4&8 diameter: = 0.062 [1.57], others: = 0.04 [1.0] (6X) Please call 1-888-41-ASTEC for further inquiries or visit us at www.astecpower.com MODEL: AEO_ALO04/12/20/25x48 SERIES AUGUST 25, 2005 - REVISION G SHEET 26 OF 26 |
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