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| Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) The ALQ50 series is Astec's next generation single output, high-density standard quarter brick offering. It operates from a 36V to 75V DC Bus and comes in different Isolated Logic Output voltages (ILO) well suited for DPA applications. It's designed to conservatively handle 50A of output current for 2.5V and below at high levels of efficiency (3.3V @ 90.5%). It provides tight regulation and exhibits clean and monotonic output start up characteristics. The ALQ50's come with industry standard features such as Input UVLO, OCP, OVP, OTP, Output Trim, differential output Sense pins. With its 0.36" low profile and open frame construction, it offers optimum board mounting flexibility. ALQ50 Single Output Open-Frame DC-DC Converter Module Industry Standard 1/4 Brick: 36V-75V Input / 50A Output Current PRELIMINARY Electrical Parameters Input Input Range Input Surge Efficiency 36-75 VDC 100V / 100ms 3.3V @ 90.5% (Typ) 2.5V @ 90.0% 1.8V @ 89.0% 1.2V @ 86.5% Control Enable TTL compatible (Positive and Negative Enable Options) Output Special Features * * * * * * * * Industry Standard 1/4 Brick Footprint Positive and Negative Enable Options Regulation to Zero Load High Capacitive Load Start-up Fixed Switching Frequency at 480kHz Output Trim Input Under-Voltage Lockout Low profile / open-frame Load Current Line/Load Regulation Ripple and Noise Output Voltage Adjust Range Transient Response 2.5V @ 50A max < 1% VO 60mVPK-PK max 10% VO 5% VO deviation (Typ) 50% to 75% Load Change 250sec settling time (Typ) +10%VO 120% IO,MAX Remote Sense Over Current Protection Environmental Specifications * * * -40C to 85C Operating Temperature -40C to 125C Storage Temperature MTBF > 1 million hours Safety UL + cUL 60950, Recognized (Pending) EN60950 through TUV-PS (Pending) MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 1 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) ALQ50 Series THIS SPECIFICATION COVERS THE REQUIREMENTS FOR A NEW 1/4-BRICK SIZE 50A SINGLE OUTPUT HIGH EFFICIENCY DC/DC CONVERTER. MODEL NAME ALQ40F48 ALQ50G48 ALQ50Y48 ALQ50K48 CONSTRUCTION Open Frame; Low Profile Open Frame; Low Profile Open Frame; Low Profile Open Frame; Low Profile VOUT / IOUT 3.3V / 40A 2.5V / 50A 1.8V / 50A 1.2V / 50A OPTIONS: Negative Enable: Positive Enable: SUFFIX "N" No suffix MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 2 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Electrical Specifications STANDARD TEST CONDITION on a single module unless otherwise specified. TA Airflow +VIN Enable -VIN -VOUT -Sense Trim +Sense +Vout PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 25C (Ambient Air) Refer to Figures 21 to 24 Return pin for +VIN Dependent on model series 48V 2V Connected to Load Connected to +VOUT Open Connected to -VOUT Connected to Load (return) 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 Operating Ambient Temperature Storage Temperature Operating Humidity Maximum Enable Voltage Max Output Power Device All All All All All All All F (3.3V) G (2.5V) Y (1.8V) K (1.2V) Symbol VIN VI N, trans Min 0 0 1500 -40 -40 Typ Max 75 100 +85 125 85 25 132 125 90 60 Unit Vdc Vdc Vdc C C % Vdc W W W W TA TSTG PO PO PO PO MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 3 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame 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) Device All All Symbol VIN Min 36 33 32 Typ 48 Max 75 35 34 4.4 4.3 3.2 2.3 5 5 3.3 2.5 10 Unit VDC Vdc A Input Reflected Ripple Current2 Conditions: PO = PO,max; TA = 25 C BW: 5Hz to 20MHz Note: F (3.3V) G (2.5V) Y (1.8V) K (1.2V) 3V3 (F) 2V5 (G) 1V8 (Y) 1V2 (K) All IIN,max W II1/ II2 mAPK-PK 1. An input line fuse is recommended for use. 2. External input capacitance required. See Input Ripple Current test measurement setup on Fig 1. 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 Noise4 Peak-to-Peak: (5Hz to 20MHz) Output Current3 External Load Capacitance Capacitor ESR Output Current-limit Inception VOUT = 90% VO,SET5 Device 3V3 (F) 2V5 (G) 1V8 (Y) 1V2 (K) Max Symbol VO,SET Min 3.260 2.465 1.770 1.180 0 0 4 41 52 Typ 3.300 2.500 1.800 1.200 25 35 45 - Max 3.340 2.535 1.830 1.220 0.20 0.30 0.20 0.30 1.00 50 75 100 40 50 25,000 52 68 Unit Vdc Vdc Vdc Vdc %Vo All 1V2 (K) All 1V2 (K) All 1V2 1V8/2V5 3V3 3V3 All All 3V3 All IO IO mVp-p mVp-p mVp-p A F m A MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 4 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Electrical Specifications (continued) OUTPUT SPECIFICATIONS Parameter Over Voltage Protection Range7 Device 3V3 (F) 2V5 (G) 1V8 (Y) 1V2 (K) All 3V3 (F) 2V5 (G) 1V8 (Y) 1V2 (K) All All 2V5 Symbol Min 3.9 3.0 2.0 1.4 110 89.5 89.0 88.0 85.5 440 490 Typ 4.1 3.2 2.4 1.6 90.5 90.0 89.0 86.5 480 540 0.1 Max 4.9 3.9 2.9 2.1 120 15 520 590 Unit V Over Temperature Range6 (AVG PCB TEMPERATURE) C % % % % ms KHz KHz A/s mV s mV s %Vo Efficiency VIN = VIN-NOM; IO = IO,MAX TA=25C Turn-On Response Time VIN = VIN-MIN to VIN-MAX Switching Frequency Dynamic Response: IO/t=0.1A / uS CO = 0uF Load Change from IO = 50% to 75% of IO, Max: Peak Deviation Settling Time to VO, Nom Load Change from IO = 50% to 25% of IO, Max: Peak Deviation Settling Time to VO, Nom Output Overshoot at T-on / T-off Passive Resistive Full Load Note: - 1V2/1V8 2V5/3V3 All - - 100 125 250 140 165 500 1V2/1V8 2V5/3V3 All All - - 100 115 250 - 140 150 500 5 3. Appropriate Thermal Derating applies. See Appendix B for the Thermal Derating Curves 4. See Figure 2 for Ripple and Noise test measurement setup. 5. In an event of an over current condition - the converter will be latched off. Restart is possible either by cycling the input voltage or toggling the Enable signal for 100ms. Consult factory for Auto restart option. 6. Output of the module will be terminated once the operating temp reaches the OTP range. Normal operation resumes once the temperature falls below the OTP range. 7. The OVP mode is latching. The converter will be latched off once the sensed voltage across the output pins exceeds the threshold limits. Restart is possible by either cycling the input voltage or toggling the Enable signal for 100ms. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 5 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Electrical Specifications (continued) FEATURE SPECIFICATION Parameter Output Enable ON/OFF10 Negative Enable ("N" suffix) Enable Pin voltage for Module ON Module OFF Positive Enable (No suffix) Enable Pin voltage for Module ON Module OFF Output Voltage Remote Sensing11,13 Output Voltage Trim Range12,13 Note: Device N suffix Symbol Min 0 2.95 Typ Max 1.2 20.0 Unit V V No suffix All All - 2.95 0 90 - 20.0 1.2 10 110 V %VO %VO 10. See Appendix A.3 for the recommended/ appropriate Module Enable configuration. 11. 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 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. 12. Refer to Equation (1) and (2) and Figures 3 and 4 for the Output Trim Adjust configuration. 13. The combination of remote sense and Trim adjust cannot exceed 110% of VO, NOM. ISOLATION SPECIFICATION Parameter Isolation Capacitance Isolation Resistance Device All All Symbol Min 10 Typ 2.70 Max Unit nF M SAFETY APPROVAL The ALQ50 series have been certified through: * UL + cUL 60950, Third Edition - Recognized (PENDING) * EN 60950 through TUV-PS (PENDING)\ * Basic Insulation MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 6 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame 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: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 7 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame 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 ALQ50 series have been designed to turn-on once VIN is in the voltage range of 33-35 VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 3234 VDC. 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. 3.3V/2.5V/1.8V Equation (1a): 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 1.2V Equation (1b): Radj_up 5.1 Vo( 100 + %) - 510 - 10.2 k 0.6 % % 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 Figure 4. External resistor configuration to increase the outputs MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 8 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Basic Operation and Features (continued) OUTPUT ENABLE The ALQ50 series 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 latching mode. The converter is latched off if the output voltage exceeds the OVP threshold limits. The OVP latch is reset either by cycling the input voltage or toggling the Enable signal for 100ms. OVER CURRENT PROTECTION (OCP) The Over Current Protection circuit comes in latching mode. The converter is latched off if the load current on the output reaches the OCP threshold limit. The OCP latch can be reset either by cycling the input voltage or toggling the Enable signal for 100ms. Consult factory for Auto-restart option. 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: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 9 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Performance Curves ALQ40F48 (3.3V) SERIES Efficiency VS. Load Current, T A=25C 95% Power Dissipation vs Output Current, T A=25C 20 Power Dissipation (Watts) Vin = 36 Vdc 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 Output Current (Amps) 40 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 16 12 8 4 0 0 Vin = 48 Vdc Vin = 75 Vdc 10 20 30 Output Current (Amps) 40 Figure 5. Efficiency vs. Load Current Curves at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 6. Power Dissipation vs. Load Current at TA=25C for different input voltages with 300LFM airflow directed from Pins 3 to 1. Efficiency vs Load Current, T A=85C 95% Power Dissipation (Watts) 90% 85% Efficiency 80% 75% 70% 65% Vin = 36V Power Dissipation vs Output Current, T A=85C 20 Vin = 36 Vdc 16 12 8 4 0 Vin = 48 Vdc Vin = 75 Vdc 60% 55% 50% 0 10 20 30 Output Current (Amps) Vin = 48V Vin = 75V 40 0 10 20 30 Output Current (Amps) 40 Figure 7. Efficiency vs. Load Current Curves at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 8. Power Dissipation vs. Load Current at TA=85C for different input voltages with 300LFM airflow directed from Pins 3 to 1. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 10 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Performance Curves (continued) ALQ50G48 (2.5V) SERIES Efficiency vs Output Current, T A= 25C 95% Power Dissipation (Watts) 90% 85% Efficiency 80% 75% 70% 65% Vin = 36Vdc Power Dissipation vs Output Current, T A= 25C 20 Vin = 36 Vdc 16 12 8 4 0 Vin = 48 Vdc Vin = 75 Vdc 60% 55% 50% 0 10 Vin = 48Vdc Vin = 75Vdc 20 30 40 Output Current (Amps) 50 0 10 20 30 40 Output Current (Amps) 50 Figure 9. Efficiency vs. Load Current Curves at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 10. Power Dissipation vs. Load Current at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Efficiency vs Output Current, T A= 85C 95% Power Dissipation (Watts) 20 Dissipation vs Output Current, T A= 85C 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 40 Output Current (Amps) 50 Vin = 36 Vdc Vin = 48 Vdc Vin = 75 Vdc Vin = 36 Vdc 16 12 8 4 0 0 Vin = 48 Vdc Vin = 75 Vdc 10 20 30 40 50 Output Current (Amps) Figure 11. Efficiency vs. Load Current Curves at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 12. Power Dissipation vs. Load Current at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 11 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Performance Curves (continued) ALQ50Y48 (1.8V) SERIES Efficiency VS. Load Current, T A=25C 95% 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 40 Output Current (Amps) 50 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc Power Dissipation vs Output Current, T A=25C 20 Power Dissipation (Watts) Vin = 36 Vdc 16 12 8 4 0 0 Vin = 48 Vdc Vin = 75 Vdc 10 20 30 40 Output Current (Amps) 50 Figure 13. Efficiency vs. Load Current Curves at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 14. Power Dissipation vs. Load Current at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Efficiency vs Output Current T A= 85C 95% Power Dissipation (Watts) 20 Dissipation vs Output Current, T A= 85C 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 40 50 Output Current (Amps) Vin = 36 Vdc Vin = 48 Vdc Vin = 75 Vdc Vin = 36 Vdc 16 12 8 4 0 0 Vin = 48 Vdc Vin = 75 Vdc 10 20 30 Output Current (Amps) 40 50 Figure 15. Efficiency vs. Load Current Curves at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 16. Power Dissipation vs. Load Current at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 12 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Performance Curves (continued) ALQ50K48 (1.2V) SERIES Efficiency vs Output Current, T A= 25C 95% Power Dissipation (Watts) Power Dissipation vs Output Current, T A= 25C 20 Vin = 36 Vdc 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 40 Output Current (Amps) 50 Vin = 36Vdc Vin = 48Vdc Vin = 75Vdc 16 12 8 4 0 0 Vin = 48 Vdc Vin = 75 Vdc 10 20 30 40 50 Output Current (Amps) Figure 17. Efficiency vs. Load Current Curves at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 18. Power Dissipation vs. Load Current at TA=25C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Efficiency vs Output Current, T A= 85C 95% Dissipation vs Output Current, T A= 85C 20 Power Dissipation (Watts) Vin = 36 Vdc 90% 85% Efficiency 80% 75% 70% 65% 60% 55% 50% 0 10 20 30 40 50 Output Current (Amps) Vin = 36 Vdc Vin = 48 Vdc Vin = 75 Vdc 16 12 Vin = 48 Vdc Vin = 75 Vdc 8 4 0 0 10 20 30 40 Output Current (Amps) 50 Figure 19. Efficiency vs. Load Current Curves at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. Figure 20. Power Dissipation vs. Load Current at TA=85C for different input voltages with 300 LFM airflow directed from Pins 3 to 1. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 13 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Performance Curves (continued) CURRENT VS. TEMPERATURE CURVES 3.3V DERATING, 48V Input 40 35 Output Current (A) Output Current (A) 30 25 20 15 0 LFM (0 m/ s) 2.5V DERATING, 48V Input 50 45 40 35 30 25 0 LFM (0 m/s) 10 5 0 25 100 LFM (0.5m/ s) 200 LFM (1.0 m/ s) 400 LFM (2.0 m/s) 20 15 10 100 LFM (0.5m/s) 200 LFM (1 m/s) 400 LFM (2 m/ s) 35 45 55 65 75 Ambient Temperature (C) 85 25 35 45 55 65 75 Ambient Temperature (C) 85 Figure 21. ALQ40F48 (3.3V) Output Derating curves at various airflow conditions directed across PIN 3 to 1 with the module mounted vertically. Figure 22. ALQ50G48 (2.5V) Output Derating curves at various airflow conditions directed across PIN 3 to 1 with the module mounted vertically. 1.8V DERATING, 48V Input 50 45 Output Current (A) Output Current (A) 40 35 30 25 0 LFM (0 m/ s) 1.2V DERATING, 48V Input 50 45 40 35 30 25 20 15 10 85 0 LFM (0 m/ s) 100 LFM (0.5m/ s) 200 LFM (1.0 m/ s) 400 LFM (2.0 m/ s) 20 15 10 25 100 LFM (0.5m/ s) 200 LFM (1.0 m/ s) 400 LFM (2.0 m/s) 35 45 55 65 75 Ambient Temperature (C) 25 35 45 55 65 75 Ambient Temperature (C) 85 Figure 23. ALQ50Y48 (1.8V) Output Derating curves at various airflow conditions directed across PIN 3 to 1 with the module mounted vertically. Figure 24. ALQ50K48 (1.2V) Output Derating curves at various airflow conditions directed across PIN 3 to 1 with the module mounted vertically. MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 14 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Mechanical Specifications Parameter Dimension Device All Symbol L W H Min +VIN ENABLE -VIN -VO 5 6 7 8 -SENSE TRIM +SENSE +VO Typ 2.30 [58.42] 1.48 [37.59] 0.36 [9.10] Max Unit in [ mm ] in [ mm ] in [ mm ] g [oz] Weight PIN ASSIGNMENT 1 2 3 4 [58.4] 0.36 [9.1] 0.20[5.0] MIN 0.24[6.0] MAX [1.5O 2 PLACES ] 0.06O 1 1.48 [37.6] 2 3 8 7 6 5 4 ] 0.04O [1.0O 6 PLACES PIN SIDE DOWN 0.15 [3.8] 0.44 0.74 [11.2] 1.04 [18.8] [26.4] C L 2.00 [50.8] SIDE VIEW PIN ASSIGNMENT 1 2 3 4 5 6 7 8 + VIN Enable -VIN -Vout -Sense Trim + Sense + Vout 0.44 0.59 [11.2] [15.0] 0.74 0.89 [18.9] [22.7] 1.04 [26.5] Figure 25. ALQ50 Series Mechanical Outline Drawing MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 15 OF 16 Technical Reference Notes ALQ40/50 Series (Open Frame Single Output Quarter Brick) Mechanical Specifications (continued) SOLDERING CONSIDERATIONS The ALQ50 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 FOR ORDERING OUTPUT VOLTAGE ENABLE LOGIC ALQ40 / 50 x F = 3.3V G = 2.5V Y = 1.8V K = 1.2V 48 y N = Negative Enable "Blank" = Positive Enable (Default) Please call 1-888-41-ASTEC for further inquiries or visit us at www.astecpower.com MODEL: ALQ50 SERIES APRIL 21, 2003 - REVISION A (PRELIMINARY) SHEET 16 OF 16 |
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