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| Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) AEQ75Y48 Single Output: Baseplate DC-DC Converter Module Industry Standard 1/4 Brick: 36V-75V Input / 1.8V @ 75A Output Current The AEQ75Y48 series is the latest addition to Astec's quarter brick size offerings. At 1.8V, it delivers 75A maximum output current at 89% Efficiency. It provides tight regulation and exhibits clean and monotonic output start up characteristics. The new modules come with industry standard features such as Input UVLO, OCP, OVP, OTP, Output Trim, differential output Sense pins. It also comes standard with 2 pairs of output power pins (add suffix "-3" for single pair output pin option) and offers baseplate construction for optimum user flexibility. Electrical Parameters Input Input Range Input Surge Efficiency 36-75 VDC 100V / 100ms 1.8V @ 89% (Typ) Control Enable TTL compatible (Positive and Negative Enable Options) Output Special Features * * * * * * * * Industry Standard 1/4 Brick Footprint Redundant output power pins (with single pair option) Positive and Negative Enable Options Regulation to Zero Load High Capacitive Load Start-up Output Trim Input Under-Voltage Lockout Low profile Load Current Line/Load Regulation Ripple and Noise Output Voltage Adjust Range Transient Response 1.8V @ 75A max < 1% VO 100mVPK-PK max 10% VO < 100mV deviation (Typ) 50% to 75% Load Change 100sec settling time (Typ) +10%VO 120% IO,MAX Remote Sense Over Current Protection Environmental Specifications * * * -40C to 105C Operating Temperature -55C to 125C Storage Temperature MTBF > 1 million hours Safety UL + cUL 60950, Recognized EN60950 through TUV-PS MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 1 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter 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 Voltage1 Continuous Transient (100ms) Isolation Voltage Input to Output Input to Baseplate Output to Baseplate Operating Ambient Temperature Storage Temperature Operating Humidity Maximum Enable Voltage Max Output Power Device All All All Symbol VIN VI N, trans Min 0 0 1500 Typ Max 75 100 Unit Vdc Vdc Vdc All All All All TA TSTG PO -40 -55 10 - - 105 125 85 25 135 C C % Vdc W STANDARD TEST CONDITION on a single module unless otherwise specified. TA Airflow +VIN Enable -VIN -VOUT -VOUT -Sense Trim +Sense +Vout +Vout PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9 PIN 10 25C (Ambient Air) 400LFM +48Vdc input supply Dependent on model series Return pin for +VIN Connected to Load Return [Optional Pin] Connected to Load Return Connected to -VOUT Open Connected to +VOUT Connected to +Load Connected to +Load [Optional Pin] MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 2 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Electrical Specifications (continued) INPUT SPECIFICATION Parameter Operating Input Voltage Input Under-Voltage Lock-out T_ON Threshold T_OFF Threshold Maximum Input Current1 Conditions: VIN =VIN,min IO = IO,max; TA = 25 C Max PDISS @ IO = 0A (VIN = VIN,NOM) @ 25 C Input Reflected Ripple Current2 Conditions: PO = PO,max; TA = 25 C BW: 5Hz to 20MHz Device All T1 All Symbol VIN Min 36 36 34 32 Typ 48 48 34.8 33.5 Max 75 62 35.5 34.5 4.5 Unit VDC Vdc A All IIN,max All All II1 - 3 10 4 20 W mAPK-PK OUTPUT SPECIFICATIONS Parameter Output Voltage Set point VIN = VIN, min to VIN, max; IO =IO,Max Output Regulation Line: VIN = VIN, Min to VIN, Load: IO = IO, Min to IO, Max Temperature: Ta = -40 C to +85C Ripple and Noise3 RMS (5Hz to 20MHz) Peak-to-Peak: (5Hz to 20MHz) Output Current4 External Load Capacitance Capacitor ESR Output Current-limit Inception5 VOUT = 90% VO,SET Over Voltage Protection Range5 Over Temperature Range6 AEQ (referenced to avg Baseplate temp) Device All Symbol VO,SET Min 1.770 Typ 1.800 Max 1.830 Unit Vdc Max All All All - - 0.10 0.05 15 0.30 0.20 50 %Vo %Vo mV All - - 25 80 - 30 100 75 25,000 90 2.9 mVRMS mVp-p A F m A V All All All All IO IO 0 4 78 2.1 AEQ TBP - 110 - C MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 3 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Electrical Specifications (continued) OUTPUT SPECIFICATIONS Parameter Efficiency VIN = VIN-NOM; TA=25C Turn-On Response Time VIN = VIN-MIN to VIN-MAX Switching Frequency Dynamic Response: CO = 0uF Peak Deviation Load Change from IO = 50% to 75% of IO, Max: Settling Time to VO, Nom Peak Deviation Load Change from IO = 50% to 25% of IO, Max: Settling Time to output voltage setpoint tolerance - Vo,SET Output Overshoot at T-on / T-off Note: Device All Symbol Min 88 Typ 89 Max Unit % All All IO/t All - 440 - 15 520 ms KHz - 0.09 0.1 1.1 A/s %Vo,SET s %Vo,SET s Vpk ts - 4 100 4 100 8 300 8 300 All Vpk ts All - - - 4 %Vo 1. An input line fuse is recommended for use. 2. External input capacitance required. See Input Ripple Current test measurement setup on Figure 1. 3. Refer to Figure 2 for output ripple measurement setup. 4. Appropriate Thermal Derating applies. See Figure 6. 5. Over current and over voltage protections are all in auto recovery mode. The converter will shutdown during fault condition then will attempt to auto restart. 6. Output of the module will be terminated once the operating temperature reaches the OTP threshold. Normal operation resumes once the temperature falls below the OTP threshold. MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 4 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Electrical Specifications (continued) FEATURE SPECIFICATION Parameter Output Enable ON/OFF Negative Enable ("N" suffix) Enable Pin voltage for Module OFF Module ON Positive Enable (No suffix) Enable Pin voltage for Module ON Module OFF Enable Pin current Module at ON State Module at OFF State (Leakage) Output Voltage Remote Sensing7, 9 Output Voltage Trim Range8, 9 Note: Device Symbol Min Typ Max Unit N suffix - 2.95 0 - 20.0 0.8 V V No suffix All - 0 2.95 90 - 0.8 20.0 1 50 10 110 V V mA A %VO %VO All All 7. The 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 8 (+Sense) and Pin 6 (-Sense) should be connected to Pin 9 (+Vout) and Pin 5 (Return) respectively at the point where regulation is desired. 8. Refer to Equation (1) and (2) and Figures 3 and 4 for the Output Trim Adjust configuration. 9. The combination of remote sense and Trim adjust cannot exceed 110% of VO, NOM. ISOLATION SPECIFICATION Parameter Isolation Capacitance Isolation Resistance MTBF Telcordia SR332 (Parts Stress) TA = 40C; IO = 30A; Airflow = 200LFM Device All All Min 10 Typ 2.70 1,029,514 Max Unit nF M Hrs SAFETY APPROVAL The AEQ75Y48 series have been certified through: * UL + cUL 60950, Third Edition - Recognized * EN 60950 through TUV-PS MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 5 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter 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(-) Note: Measure the input reflected ripple current with a simulated source inductance (Ltest) of 12uH. Capacitor Cs offsets possible battery/ source impedance. Measure current as shown above. Figure 1. Input Reflected Ripple Current Measurement Setup. COPPER STRIP Vo(+) 1 uF Vo(-) 10 uF SCOPE RESISTIVE LOAD Note: Use a 1F 50V X7R ceramic capacitor and a 10F 25V tantalum cap. Scope measurement should be made using a BNC probe socket positioned about 76mm (3 in.) away from the module's output terminals. The ext. capacitors should be placed between the BNC socket and the module's output terminals, with a minimum distance of 51mm (2in.) from the latter. Figure 2. Peak to Peak Output Noise Measurement Setup. MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 6 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter 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 34-35.5VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 32-34.5 VDC. OUTPUT VOLTAGE ADJUST/TRIM The converter comes with a TRIM pin (PIN 7), 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 (Pin7) and +SENSE PIN (Pin 8). Please refer to Equation (1) for the required external resistance and output adjust relationship. Equation (1): Radj_up -Vin -Vout -Sense Enable Vadj Rload Radj_up +Sense +Vin +Vout 5.1 Vo(100 + %) - 510 - 10.2 k 1.225 % % Figure 3. External resistor configuration to increase the outputs To DECREASE the output, external Radj_down resistor should be connected between TRIM PIN (Pin 7) and -SENSE PIN (Pin 6). 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 Figure 4. External resistor configuration to increase the outputs MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 7 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter 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 part number 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 comes in shutdown mode. The output of the converter is terminated under an OVP fault condition (Vo > OVP threshold). The converter will automatically recover once the fault condition is removed. OVER CURRENT PROTECTION (OCP) The Over Current Protection circuit comes in shutdown mode. The converter shuts down once the output current reaches the OCP range. The converter will automatically recover once the fault condition is removed. OVER TEMPERATURE PROTECTION (OTP) The Over Temperature Protection circuit will shutdown the converter once the average PCB temperature 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. MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 8 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Performance Curves Efficiency vs. Output Current, T B = 45C 95% 90% Power Dissipation [W] Power Dissipation vs. Output Current, T B=45C 22 20 18 16 14 12 10 8 6 4 2 0 0 15 30 45 Output Current [A] 60 75 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 85% Efficiecny [%] 80% 75% 70% 65% 60% 55% 0 20 40 Output Current [A] 60 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Figure 5. Efficiency vs. Load Current at Baseplate Temperature, TB = 45C. Figure 6. Power Dissipation vs. Load Current at Baseplate Temperature, TB = 45C. Output Current vs. Temperature 75 60 Current [A] 45 30 0 LFM (0 m/s) 1 LFM (0.5 m/s) 00 200 LFM (1m/s) 400 LFM (3 m/s) 15 0 25 35 45 55 65 Ambient Temperature [C] 75 85 Figure 7. Output Power Derating Curves at VIN = 48Vdc. Figure 8. Output Ripple Waveform at VIN = 48Vdc, TA = 25C, IO = 75A. MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 9 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Performance Curves (continued) Performance Curves (continued) Figure 9. Output Transient Response (50% to 75% Step Change) at VIN = 48Vdc, TA = 25C. Figure 10. Output Transient Response (25% to 50% Step Change) at VIN = 48Vdc, TA = 25C. Figure 11. Enable Turn On Characteristic at VIN = 48Vdc, TA = 25C. Figure 12. Output Startup Waveform at VIN = 48Vdc, TA = 25C, IO = 75A. MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 10 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Mechanical Specifications Parameter Dimension Device All Symbol L W H Min 6 7 8 9 10 Typ 2.30 [58.42] 1.48 [37.59] 0.44 [9.10] 54 [1.90] Max Unit in [ mm ] in [ mm ] in [ mm ] g [oz] Weight PIN ASSIGNMENT 1 2 3 4 5 AEQ +VIN ENABLE -VIN -VO [Optional] -VO -SENSE TRIM +SENSE +VO +VO [Optional] 2.30 [58.4] 1.86 [47.3] MOUNTING HOLE (2X) M3 X 0.5 THROUGH MAXIMUM SCREW TOURQUE 3.9 LBS(0.44 N-m) 1.45 [36.8] 0.21 [5.3] 1.03 [26.1] PIN SIDE DOWN 0.22 [5.6] 0.44 [11.2] SIDE VIEW 0.20 (TYP) [5.1] 0.15 [3.8] 0.43 [10.9] 0.30 [7.6] 3 0.60 [15.2] 2 1 2.00 [50.8] 1.88 [47.7] 0.43 [10.9] 0.15 [3.8] 0.30 [7.6] 4 5 6 7 8 9 0.45 [11.4] 0.60 [15.2] 10 PIN SIDE UP O 0.040 (1.02) DIA PINS (6 PLCS) O 0.060 (1.52) DIA PINS (4 PLCS) Figure 13. AEQ75Y48 (Baseplate) Mechanical Outline Drawing MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 11 OF 12 Technical Reference Notes AEQ75Y48 Series (Single Output Quarter Brick) Mechanical Specifications SOLDERING CONSIDERATIONS The AEQ75Y48 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. PART NUMBERING SCHEME Part Number AEQ75Y48 AEQ75Y48-3 AEQ75Y48N AEQ75Y48N-3 AEQ75Y48N-TI1 Construction Baseplate Baseplate Baseplate Baseplate Baseplate Vout / Iout / Enable Logic 1.8V / 75A; Positive Enable 1.8V / 75A; Positive Enable 1.8V / 75A; Negative Enable 1.8V / 75A; Negative Enable 1.8V / 75A; Negative Enable Pin Length 5.0 mm 5.0 mm 5.0 mm 5.0 mm 3.7 mm Pin Out Option Pins 4 & 10: Present Pins 4 & 10: Omitted Pins 4 & 10: Present Pins 4 & 10: Omitted Pins 4 & 10: Present Note: 1 - Tuned version for specific customer application. Please call 1-888-41-ASTEC for further inquiries or visit us at www.astecpower.com MODEL: AEQ75Y48 SERIES JULY 21, 2005 - REVISION 01 SHEET 12 OF 12 |
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