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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
ALQ15 Dual Output Open-Frame DC-DC Converter Module Industry Standard 1/4 Brick: 36V-75V Input / 60W Output Power
The ALQ15 series is Astec's latest dual output; high-density converter offering that comes in an industry standard 1/4 brick open-frame package. With its independently controlled output rails, the module effectively minimizes cross regulation, which has been an issue to most dual converters available in the market. The ALQ15 series has been designed to deliver 60W of clean, well-regulated, low noise DC power for today's demanding loads at respectable efficiency levels: 3.3V-2.5V combination @ 87.5% (60W output power). Output combinations currently available are 5.0V/3.3V - 3.3V/2.5V - 3.3V/1.8V 2.5V/1.5V, with each output rail able to deliver 15A max (5V@12A). The module comes with standard feature sets such as output enable with positive or negative options; output voltage-adjust; over current, over voltage and over temperature protection. In addition, it is also being offered at both 5mm (std) and 3.7mm pin lengths.
Electrical Parameters
Input
Input Range Input Surge Efficiency 36-75 VDC 100V / 100ms 5.0V/3.3V @ 89.5% (Typ at 60W) 3.3V/2.5V @ 87.7% 3.3V/1.8V @ 86.5% 2.5V/1.5V @ 84.0%
Control
Enable TTL compatible (Positive and Negative Enable Options)
Output
Special Features
* * * * * * * * * * Tight Regulation Low Ripple and Noise at < 30mVPK-PK Industry Standard 1/4 Brick Footprint Positive and Negative Enable Options Regulation to Zero Load High Capacitive Load Start-up Fixed Switching Frequency Output Trim Input Under-Voltage Lockout Basic Insulation
15A max per channel (60W max) 5V @ 12A max Line/Load Regulation < 1% VO (Typ) Ripple and Noise 30mVPK-PK Output Voltage Adjust Range 10% Vo Transient Response 3% VO deviation max (3.3V) 50% to 75% Load Change 220 sec typical settling time (for 3.3V) Over Current Protection
Load Current
130% IO,max typical
Environmental Specifications
* * * -40C to 85C Operating Temperature -55C to 125C Storage Temperature Designed for > 1 million hours MTBF
Safety
UL + cUL 60950, Recognized EN60950 through TUV-PS CB Report
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
ALQ15 SERIES
MODEL NAME ALQ15AF48 ALQ15FG48 ALQ15FG48N-6D* ALQ15FY48 ALQ15GM48
CONSTRUCTION Open Frame Open Frame Open Frame Open Frame Open Frame
VOUT / IOUT 5.0V-12A / 3.3V-15A 3.3V-15A / 2.5V-15A 3.3V-15A / 2.5V-15A 3.3V-15A / 1.8V-15A 2.5V-15A / 1.5V-15A
OPTIONS: Negative Enable: Positive Enable: 3.7mm (nominal) Pin Length:
SUFFIX "N" No suffix "-6"
* Check Part Numbering Scheme on Table 2 and the corresponding external trim function on Table 1-D
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications
STANDARD TEST CONDITION on a single module unless otherwise specified. TA: +VIN: ENABLE: -VIN: +VOUT2: -VOUT: TRIM: +VOUT1: Airflow 25C (Ambient Air) PIN 1 48V 2V PIN 2 Open (Positive Enable) PIN 3 Return Pin for +VIN PIN 4 Connect to Load 2 PIN 5 Return Pin for Load 1 & 2 PIN 6 Open PIN 7 Connect to Load 1 Refer to the appropriate derating curve
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) : Operating Ambient Temperature1 Storage Temperature Operating Humidity I/O Isolation Maximum Enable Voltage Device All All All All All All All Symbol VIN VI N, trans TA TSTG Min 0 0 -40 -55 1500 Typ Max 75 100 +85 125 85 25 Unit Vdc Vdc C C % Vdc Vdc
NOTE: 1. Power Derating applies. Refer to Figures 15 to 18.
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
INPUT SPECIFICATION Parameter Operating Input Voltage Maximum Input Current2 Conditions: VIN = between 0 to VIN,min PO = PO,max; TA = 25 C Input Reflected Ripple Current3 Conditions: PO = PO,max; TA = 25 C Standing Loss Condition: VIN = VIN,nom; TA = 25 C Device All AF FG FY GM All All Symbol VIN IIN,max Min 36 Typ 48 Max 75 2.20 2.20 2.20 2.27 20 3.0 Unit VDC A
II1/ II2 -
-
10 -
mAPK-PK W
NOTE: 2. The power module is not internally fused. An input line fuse (e.g. Littelfuse Type 312003. 3A, 250V) is recommended. 3. See Figure 1 for Input Reflected Ripple Current Test Setup.
OUTPUT SPECIFICATIONS Parameter Voltage Setpoint Conditions: VI = VIN,nom; TA = 25 C; VO1: IO1 = IO,max; PO = 60W VO2: IO2 = IO,max; PO = 60W Load Current Device AF FG FY GM 5.0V 3.3V 2.5V 1.8V 1.5V AF FG FY GM 5.0V 3.3V 2.5V 1.8V 1.5V Symbol VO1/ V O2 VO1/ V O2 VO1/ V O2 VO1/ V O2 IO1/IO2 IO1/IO2 IO1/IO2 IO1/IO2 IO1/IO2 PO PO PO PO Min 4.93 / 3.25 3.25 / 2.46 3.25 / 1.76 2.46 / 1.47 0 0 0 0 0 Typ 5.00 / 3.30 3.30 / 2.50 3.30 / 1.80 2.50 / 1.50 0.06 0.03 0.03 0.03 0.03 Max 5.08 / 3.35 3.35 / 2.54 3.35 / 1.84 2.54 / 1.53 12.0 15.0 15.0 15.0 15.0 60 60 60 60 0.15 0.10 0.10 0.10 0.10 Unit Vdc
A
Combined Output Power PO = PO1 + PO2
W
Line Regulation: Conditions: VIN = VIN, min to VIN, max; IO1 = IO, max, IO2 = IO, min VIN = VIN, min to VIN, max; IO1 = IO, min, IO2 = IO, max
%Vo
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS Parameter Load Regulation Conditions: IO = 1A to IO,max; VIN =VIN,nom Cross Regulation4 Conditions: VIN = VIN,nom, IO = IO,max Temperature Conditions: TA = -40 C to +65 C; VIN = VIN,nom; IO = IO,max Output Ripple and Noise: Peak-to-Peak5 Conditions: IO = IO,max; VIN =VIN,nom; BW = 20 MHz; TA =25 oC External Load Capacitance6 Over Current Limit Inception Conditions: Vo = 90% VO,nom; IO2 = IO,min; VIN = VIN,nom Characteristics: Hiccup mode, auto-recovery Output Short Circuit Conditions: VIN = VIN,nom; IO2 = 0A TA = 25 C
4
Device 5.0V 3.3V 2.5V 1.8V 1.5V All
Symbol
Min -
Typ 0.06 0.12 0.20 0.26 0.33 -
Max 0.40 0.60 0.70 0.90 1.00 0.20
Unit %Vo
%Vo
All 5.0 3.3 2.5 1.8 1.5 All All 5.0V IO,OCP IO,OCP
16.5 13.2
12 12 12 18 18 -
1.50 25 25 25 30 30 10000 25 22
%Vo mVPK-PK
F A
All
IOPK IORMS IODC IINS -
-
-
28 5 1 150 90.5 88.5 87.5 85.0 375
APK ARMS A mA %
Efficiency Conditions: VIN = VIN,nom; TA = 25 C PO = PO,max, balanced current loading Switching Frequency Note: Can be determined from output ripple waveform
AF FG FY GM All
89.0 87.0 86.0 83.0 -
89.5 87.7 86.5 84.0 300
KHz
NOTE: 4. Channel under test shall follow the specified conditions while the other channel is set to min load, 0A. 5. Channel under test shall be set to full load with the other channel set to IO, min - See Fig 2 for the recommended output ripple and noise test setup. 6. Refer to YSC plots on Fig 19 and 20 to determine loop stability at various output load impedance.
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS Parameter Dynamic Response Conditions: IO/t = 0.15A/s ; VIN = VIN,nom ; TA = 25C Peak Voltage Deviation Load Change: IO = 50% to 75% or 75% to 50% IO,max 5.0V 3.3V 2.5V 1.8V 1.5V 5.0V 3.3V 2.5V 1.8V 1.5V AF FG FY GM 5.0V 3.3V 2.5V 1.8V 1.5V 0.8 1.3 1.6 2.3 2.8 360 220 210 145 136 21 16 16 14 0 0 1 2 3 2.0 3.0 3.0 5.0 5.0 500 500 500 300 300 30 30 30 30 1 1 2 4 4 %Vo
7
Device
Symbol
Min
Typ
Max
Unit
Transient Settling Time Note: VO,nom (ref.) (from ref. to 0.1VPK)
sec
Turn-On Time Conditions: VIN = VIN,min; IO1 = IO,max, IO2 = IO,min; TA = 25C Note: VO1 within 1% Output Voltage Overshoot Conditions: VIN = VIN,nom; TA = 25C; PO = 0W
msec
%VO
NOTE: 7. Dynamic response tested with 10uF-aluminum and 1uF-tantalum capacitors across the load.
FEATURE SPECIFICATION Parameter Undervoltage Lockout Turn-on Point Turn-off Point Output Voltage Adjustment Range Conditions: VIN = VIN,nom; TA = 25C VO1: IO1 = IO,max, IO2 = IO,min VO2: IO1 = IO,min; IO2 = IO,max Note: Tolerance = 1% Device All All All Symbol Min 32 90 Typ 35.0 34.0 Max 36.0 110 Unit V V %VO
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
FEATURE SPECIFICATION Parameter Enable Pin Voltage POSITIVE LOGIC Logic Low: Module OFF Logic High: Module ON NEGATIVE LOGIC Logic Low: Module ON Logic High: Module OFF Enable Pin Current Logic Low Logic High: (ILKG at VENABLE = 5V) Module Output Voltage at Logic High (Negative Enable) at Logic Low (Positive Enable) Output Over Voltage Clamp Conditions: VIN = VIN,nom; TA = 25C Characteristics: Hiccup mode; auto-tracking wrt Vout trim Over-Temperature Shutdown Note: 1. Tcomp(max) < 140 C 2. Measured in the vicinity of pin 3 and R29 Device w/o NSuffix NSuffix Symbol Min Typ Max Unit
VENABLE VENABLE VENABLE VENABLE IENABLE IENABLE VO VO VO,CLAMP VO,CLAMP VO,CLAMP VO,CLAMP VO,CLAMP TB
0 1.5 0 1.5 5.7 3.8 2.8 2.0 1.7 110
6.0 3.9 3.0 2.2 1.8 115
2.2 5.0 2.2 5.0 1.0 50 1.2 1.2 6.5 4.3 3.4 2.4 2.1 120
V V V V mA A V V V V V V V C
All All NSuffix w/o NSuffix 5.0V 3.3V 2.5V 1.8V 1.5V All
ISOLATION SPECIFICATION Parameter Isolation Capacitance Isolation Resistance Device All All Symbol Min 10 Typ 680 Max Unit pF M
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Technical Reference Notes ALQ15XX48X Series
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SAFETY APPROVAL The ALQ15 series have been certified through: * UL + cUL 60950, Third Edition - Recognized * EN 60950 through TUV-PS * CB Report * Basic Insulation
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.
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Basic Operation and Features
INPUT UNDER VOLTAGE LOCKOUT To prevent any instability to the converter that may affect and consequently damage the end system, the ALQ15 series have been designed to turn-on once VIN is in the voltage range of 35-36 VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 32-34 VDC. OUTPUT VOLTAGE ADJUST/TRIM The converter comes with a TRIM pin (PIN 6), which is used to adjust both outputs simultaneously 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 voltages, external RTRIM-UP resistor should be connected between TRIM PIN (Pin6) and RTN PIN (Pin 5). Please refer to Figure 3 for the resistor configuration and Table 1 for the required resistor values in attaining the desired output adjustment To DECREASE the output voltages, external RTRIM-DOWN resistor should be connected between TRIM PIN (Pin 6) and VOUT1 (Pin 7). This trim configuration is true for the AF, FG, FY and GM standard versions. Please refer to Figure 4 for the resistor configuration and Table 1 for the required resistor values in attaining the desired output adjustment. For ALQ15FG48N-6D, RTRIM-DN resistor is connected between the TRIM PIN and VOUT2 (2.5V output pin).
Figure 3. External Trim resistor setup to increase output for all versions.
Figure 4. External Trim resistor setup to decrease output for AF; FG; FY and GM standard versions only.
TABLE 1-A ALQ15AF48 (5V / 3.3V) ? [%} RTRIM-UP [kO] +1 32.45 +2 13.66 +3 7.83 +4 4.99 +5 3.31 +6 2.20 +7 1.41 +8 0.82 +9 0.36 +10 0.00
? [%} -1 -2 -3 -4 -5 -6 -7 -8 -9 -10
RTRIM-DOWN [kO] 32.39 15.09 8.95 5.80 3.89 2.60 1.67 0.98 0.44 0.00
TABLE 1-B ALQ15FG48 / ALQ15FY48 ? [%} RTRIM-UP [kO] ? [%} +1 12.42 -1 +2 5.26 -2 +3 3.02 -3 +4 1.93 -4 +5 1.28 -5 +6 0.85 -6 +7 0.55 -7 +8 0.32 -8 +9 0.14 -9 +10 0.00 -10
RTRIM-DOWN [kO] 12.58 5.86 3.47 2.25 1.51 1.01 0.65 0.38 0.17 0.00
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Basic Operation and Features (continued)
TABLE 1-C ALQ15GM48 (2.5V / 1.5V) ? [%} RTRIM-UP [kO] ? [%} +1 70.46 -1 +2 29.65 -2 +3 17.00 -3 +4 10.83 -4 +5 7.18 -5 +6 4.77 -6 +7 3.06 -7 +8 1.78 -8 +9 0.79 -9 +10 0.00 -10 TABLE 1-D ALQ15FG48N-6D* ? [%} RTRIM-UP [kO] +1 46.84 +2 20.82 +3 12.14 +4 7.81 +5 5.20 +6 3.47 +7 2.23 +8 1.30 +9 0.58 +10 0.00
* DI/DT's QD48T025033 Trim Equivalent
RTRIM-DOWN [kO] 70.31 32.75 19.42 12.58 8.43 5.64 3.63 2.12 0.94 0.00
? [%} -1 -2 -3 -4 -5 -6 -7 -8 -9 -10
RTRIM-DOWN [kO] 66.47 27.32 15.55 9.87 6.53 4.34 2.78 1.62 0.72 0.00
ALQ15 standard trim utilizes approximately similar range of trim resistors for both RTRIM-UP and RTRIM-DOWN to adjust the outputs. This facilitates ease of resistor selection and contributes to a decreased number of parts for customer inventory if the TRIM pin is being utilized.
OUTPUT ENABLE The ALQ15 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 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 will shut down the entire converter if any of the two output voltages exceeds the OVP threshold limits. The converter will automatically recover once the fault is removed.
OVER CURRENT PROTECTION (OCP) The Over Current Protection circuit will shutdown the converter if any of the load current of either output reaches the OCP threshold limits. The unit will automatically recover once the over current condition is removed. See Figure 12 for typical output characteristic under an over current condition.
OVER TEMPERATURE PROTECTION (OTP) The Over Temperature Protection circuit will shutdown the converter once the sensed location 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.
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves
ALQ15FG48
3.3V/2.5V Efficiency @ PO1 = PO2 90 85 EFFICIENCY (%) 80 75 70 65 60 55 50 5 10 15 20 25 30 35 40 45 50 55 60 TOTAL OUTPUT POWER [W] 36Vin 48Vin 75Vin
EFFICIENCY (%) 90 85 80 75 70 65 60 55 0 2 4 6 8 LOAD CURRENT IO1 = IO2 [A] 10 36Vin 48Vin 75Vin 3.3V/2.5V Efficiency @ Balanced Current
Figure 5. Efficiency at balanced power (PO1 = PO2) for various input voltages; taken at TA=25C with the converter mounted vertically and with 200LFM airflow directed from Pin 3 to Pin 1.
Figure 6. Efficiency curve for balanced output current (IO1 = IO2) at various input voltages; taken at TA=25C with the converter mounted vertically and with 200LFM airflow directed from Pin 3 to Pin 1.
Figure 7. Start-up characteristic of Vo1 (CH1) and Vo2 (CH2) at balanced load current; VIN = 48V.
Figure 8. Typical output current waveform under an Over Current Condition. Output current scale at 0.5A/ mV.
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Technical Reference Notes ALQ15XX48X Series
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Performance Curves (continued)
ALQ15AF48 (5.0V / 3.3V) SERIES
5V/3.3V Efficiency @ PO1 = PO2 95 90 EFFICIENCY (%) EFFICIENCY (%) 85 80 75 70 65 60 55 50 5 10 15 20 25 30 35 40 45 50 55 60 TOTAL OUTPUT POWER [W] 36Vin 48Vin 75Vin 95 90 85 80 75 70 65 60 0 1 2 3 4 5 LOAD CURRENT IO1 = IO2 [A] 6 7 36Vin 48Vin 75Vin 5V/3.3V Efficiency @ Balanced Current
Figure 9. Efficiency at balanced power (PO1 = PO2) for various input voltages; taken at TA=25C with the converter mounted vertically and with 100LFM airflow directed from Pin 3 to Pin 1.
Figure 10. Efficiency curve for balanced output current (IO1 = IO2) at various input voltages; taken at TA=25C with the converter mounted vertically and with 100LFM airflow directed from Pin 3 to Pin 1.
ALQ15FY48 (3.3V / 1.8V) SERIES
3.3V/1.8V Efficiency @ PO1 = PO2 90 85 EFFICIENCY (%)
EFFICIENCY (%) 90 85 80 75 70 65 60 55 0 2 4 6 8 10 LOAD CURRENT IO1 = IO2 [A] 12 36Vin 48Vin 75Vin 3.3V/1.8V Efficiency @ Balanced Current
80 75 70 65 60 55 50 5 10 15 20 25 30 35 40 45 50 55 60 TOTAL OUTPUT POWER [W] 36Vin 48Vin 75Vin
Figure 11. Efficiency at balanced power (PO1 = PO2) for various input voltages; taken at TA=25C with the converter mounted vertically and with 300LFM airflow directed from Pin 3 to Pin 1.
Figure 12. Efficiency curve for balanced output current (IO1 = IO2) at various input voltages; taken at TA=25C with the converter mounted vertically and with 300LFM airflow directed from Pin 3 to Pin 1.
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Technical Reference Notes ALQ15XX48X Series
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Performance Curves (continued)
ALQ15GM48 (2.5V / 1.5V) SERIES
2.5V/1.5V Efficiency @ PO1 = PO2 90 85 EFFICIENCY (%) EFFICIENCY (%) 80 75 70 65 60 55 50 5 10 15 20 25 30 35 40 45 TOTAL POWER [W] 50 55 60 36Vin 48Vin 75Vin 90 85 80 75 70 65 60 55 0 3 6 9 12 LOAD CURRENT IO1 = IO2 [A] 15 36Vin 48Vin 75Vin 2.5V/1.5V Efficiency @ Balanced Current
Figure 13. Efficiency at balanced power (PO1 = PO2) for various input voltages; taken at TA=25C with the converter mounted vertically and with 400LFM airflow directed from Pin 3 to Pin 1.
Figure 14. Efficiency curve for balanced output current (IO1 = IO2) at various input voltages; taken at TA=25C with the converter mounted vertically and with 400LFM airflow directed from Pin 3 to Pin 1.
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Technical Reference Notes ALQ15XX48X Series
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Performance Curves (continued)
CURRENT VS. TEMPERATURE CURVES
Output Power VS Ambient Temperature (5V/3.3V) 70 60 Total Power (W) 50 40 30 20 10 0 5 15 25 35 45 55
o
Figure 15. Total Output Power (balanced load: IO1 = IO2) vs. Ambient Temperature Curves for ALQ15AF48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from PIN 3 to PIN1; VIN = 48V nominal).
0 LFM 100 LFM 200 LFM 300 LFM 400 LFM 65 75 85
Ambient Temperature ( C)
Output Power VS. Ambient Temperature (3.3V/2.5V) 70 60 Total Power (W) 50 40 30 20 10 0 5 15 25 35 45 55
o
Figure 16. Total Output Power (balanced load: IO1 = IO2) vs. Ambient Temperature Curves for ALQ15FG48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from PIN 3 to PIN1; VIN = 48V nominal).
0 LFM 100 LFM 200 LFM 300 LFM 400 LFM 500 LFM 600 LFM 65 75 85
Ambient Temperature ( C)
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Technical Reference Notes ALQ15XX48X Series
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Performance Curves (continued)
CURRENT VS. TEMPERATURE CURVES
Output Power VS. Ambient Temperature (3.3V/1.8V) 70 60 Total Power (W) 50 40 30 20 10 0 5 15 25 35 45 55
o
Figure 17. Total Output Power (balanced load: IO1 = IO2) vs. Ambient Temperature Curves for ALQ15FY48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from PIN 3 to PIN1; VIN = 48V nominal).
0 LFM 100 LFM 200 LFM 300 LFM 400 LFM 500 LFM 600 LFM 65 75 85
Ambient Temperature ( C)
Output Power VS. Ambient Temperature (2.5V/1.5V) 70 60 Total Power (W) 50 40 30 20 10 0 5 15 25 35 45 55
o
Figure 18. Total Output Power (balanced load: IO1 = IO2) vs. Ambient Temperature Curves for ALQ15GM48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from PIN 3 to PIN1; VIN = 48V nominal).
0 LFM 100 LFM 200 LFM 300 LFM 400 LFM 500 LFM 600 LFM
65
75
85
Ambient Temperature ( C)
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Technical Reference Notes ALQ15XX48X Series
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Young's Stability Curves
ALQ15 3.3 volt channel
1
ALQ15 2v5 volt channel
1
Impedance magnitude ohms
Impedance magnitude ohms
0.1
0.1
0.01
0.01
1 .10
3
1 .10
3
1 .10
100 1 .10
3
4
1 .10
4
1 .10
5
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
_______15 _______30 _______45 _______60 _______75 _______90
100
100
Phase angle deg
Phase deg
0
0
100
100
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
Figure 19. YSC Plots of 3V3 and 2V5 Output Channels.
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Technical Reference Notes ALQ15XX48X Series
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Young's Stability Curves (continued)
ALQ15 1v8 volt channel
1
1
ALQ15 1v5 volt channel
Impedance magnitude ohms
Impedance magnitude ohms
0.1
0.1
0.01
0.01
1 .10
3
1 .10
100 1 .10 1 .10 frequency Hz
3 4
3
1 .10
5
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
_______15 _______30 _______45 _______60 _______75 _______90
100
100
Pahse deg
Phase deg
0
0
100
100
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
100
1 .10 1 .10 frequency Hz
3
4
1 .10
5
Figure 20. YSC Plots of 1V8 and 1V5 Output Channels.
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Technical Reference Notes ALQ15XX48X Series
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Mechanical Specifications
Parameter Dimension Device All Symbol L W H Min +VIN ENABLE -VIN +VO2 5 6 7 Typ 2.30 [58.4] 1.48 [37.6] 0.50 [12.6] Max TBD Unit in [ mm ] in [ mm ] in [ mm ] g [oz]
Weight PIN ASSIGNMENT 1 2 3 4
Secondary Return/ Ground TRIM +VO1
NOTE: Pin diameters at = 0.04" [1.02 mm] nominal. Pin placement tolerance 0.005 [0.127] Mechanical tolerance 0.02 [0.5]
1 2 3 C L
7 6 5 4
TOP PIN SIDE DOWN
SIDE SIDE
FRONT
PIN SIDE UP
Figure 21. ALQ15 series mechanical outline ( inches [(mm ]).
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Technical Reference Notes ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Mechanical Specifications (continued)
SOLDERING CONSIDERATIONS The ALQ15 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 OUTPUT VOLTAGE VOLTAGE 1 2 PIN LENGTH OPTION SPECIAL FEATURE
ENABLE LOGIC
ALQ15
v
A = 5.0V F = 3.3V F = 3.3V G = 2.5V
w
F = 3.3V G = 2.5V Y = 1.8V M = 1.5V
48
x
"Blank" = Positive "N" = Negative
-
y
"Blank" = 5mm (Std) "-6" = 3.7mm
z
"D" - Special Trim function
TABLE 2. Part Numbering information.
Please call 1-888-41-ASTEC for further inquiries or visit us at www.astecpower.com
MODEL: ALQ15 SERIES MARCH 4, 2004 - REVISION 01
SHEET 19 OF 19

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