ASTEC ALQ15FG48N-6D*

Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
ALQ15 Dual Output Open-Frame DC-DC Converter Module
Industry Standard ¼ 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 ¼ 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 ([email protected]). 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 ¼ 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
Load Current
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 µsec typical settling time
(for 3.3V)
Over Current
Protection
130% IO,max typical
Environmental Specifications
Safety
•
•
•
UL + cUL 60950, Recognized
EN60950 through TUV-PS
CB Report
-40ºC to 85ºC Operating Temperature
-55ºC to 125ºC Storage Temperature
Designed for > 1 million hours MTBF
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 1 OF 19
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
OPTIONS:
Negative Enable:
Positive Enable:
3.7mm (nominal) Pin Length:
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
SUFFIX
"N"
No suffix
"-6"
* Check Part Numbering Scheme on Table 2 and the corresponding external trim
function on Table 1-D
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 2 OF 19
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
25ºC (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) :
Device
Symbol
Min
Typ
Max
Unit
All
All
VIN
VI N, trans
0
0
-
75
100
Vdc
Vdc
Operating Ambient Temperature1
All
TA
-40
-
+85
ºC
Storage Temperature
All
TSTG
-55
-
125
ºC
Operating Humidity
All
-
-
-
85
%
I/O Isolation
All
-
1500
-
-
Vdc
Maximum Enable Voltage
All
25
Vdc
NOTE: 1. Power Derating applies. Refer to Figures 15 to 18.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 3 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
INPUT SPECIFICATION
Parameter
Device
Symbol
Min
Typ
Max
Unit
Operating Input Voltage
All
VIN
36
48
75
VDC
Maximum Input Current2
Conditions: VIN = between 0 to VIN,min
PO = PO,max; TA = 25 ºC
AF
FG
FY
GM
IIN,max
-
-
2.20
2.20
2.20
2.27
A
Input Reflected Ripple Current3
Conditions: PO = PO,max; TA = 25 ºC
All
II1/ II2
-
10
20
mAPK-PK
Standing Loss
Condition: VIN = VIN,nom; TA = 25 ºC
All
-
-
-
3.0
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
Device
Symbol
Min
Typ
Max
Unit
Voltage Setpoint
Conditions: VI = VIN,nom; TA = 25 ºC;
VO1: IO1 = IO,max; PO = 60W
VO2: IO2 = IO,max; PO = 60W
AF
FG
FY
GM
VO1/ V O2
VO1/ V O2
VO1/ V O2
VO1/ V O2
4.93 / 3.25
3.25 / 2.46
3.25 / 1.76
2.46 / 1.47
5.00 / 3.30
3.30 / 2.50
3.30 / 1.80
2.50 / 1.50
5.08 / 3.35
3.35 / 2.54
3.35 / 1.84
2.54 / 1.53
Vdc
Load Current
5.0V
3.3V
2.5V
1.8V
1.5V
IO1/IO2
IO1/IO2
IO1/IO2
IO1/IO2
IO1/IO2
0
0
0
0
0
-
12.0
15.0
15.0
15.0
15.0
A
Combined Output Power
PO = PO1 + PO2
AF
FG
FY
GM
PO
PO
PO
PO
-
-
60
60
60
60
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
5.0V
3.3V
2.5V
1.8V
1.5V
-
0.06
0.03
0.03
0.03
0.03
0.15
0.10
0.10
0.10
0.10
%Vo
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 4 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Device
Min
Typ
Max
Unit
5.0V
3.3V
2.5V
1.8V
1.5V
All
-
0.06
0.12
0.20
0.26
0.33
-
0.40
0.60
0.70
0.90
1.00
0.20
%Vo
Temperature
Conditions: TA = -40 ºC to +65 ºC;
VIN = VIN,nom; IO = IO,max
All
-
-
1.50
%Vo
Output Ripple and Noise:
Peak-to-Peak5
Conditions: IO = IO,max; VIN =VIN,nom;
BW = 20 MHz;
TA =25 oC
5.0
3.3
2.5
1.8
1.5
-
12
12
12
18
18
25
25
25
30
30
mVPK-PK
External Load Capacitance6
All
-
-
10000
µF
4
Load Regulation
Conditions: IO = 1A to IO,max;
VIN =VIN,nom
Cross Regulation4
Conditions: VIN = VIN,nom, IO = IO,max
Over Current Limit Inception
Conditions: Vo = 90% VO,nom;
IO2 = IO,min; VIN = VIN,nom
Characteristics: Hiccup mode,
auto-recovery
Symbol
%Vo
All
5.0V
IO,OCP
IO,OCP
16.5
13.2
-
25
22
A
Output Short Circuit
Conditions: VIN = VIN,nom; IO2 = 0A
TA = 25 ºC
All
IOPK
IORMS
IODC
IINS
-
-
28
5
1
150
APK
ARMS
A
mA
Efficiency
Conditions: VIN = VIN,nom; TA = 25 ºC
PO = PO,max, balanced
current loading
AF
FG
FY
GM
η
η
η
η
89.0
87.0
86.0
83.0
89.5
87.7
86.5
84.0
90.5
88.5
87.5
85.0
%
Switching Frequency
Note: Can be determined from output
ripple waveform
All
-
-
300
375
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.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 5 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Device
Symbol
Min
Typ
Max
Unit
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
-
-
0.8
1.3
1.6
2.3
2.8
2.0
3.0
3.0
5.0
5.0
%Vo
Transient Settling Time
Note: VO,nom (ref.)
(from ref. to 0.1∆VPK)
5.0V
3.3V
2.5V
1.8V
1.5V
-
-
360
220
210
145
136
500
500
500
300
300
µsec
Turn-On Time
Conditions: VIN = VIN,min; IO1 = IO,max,
IO2 = IO,min; TA = 25°C
Note: VO1 within 1%
AF
FG
FY
GM
-
-
21
16
16
14
30
30
30
30
msec
Output Voltage Overshoot
Conditions: VIN = VIN,nom; TA = 25°C;
PO = 0W
5.0V
3.3V
2.5V
1.8V
1.5V
-
-
0
0
1
2
3
1
1
2
4
4
%VO
7
Dynamic Response
Conditions: ∆IO/∆t = 0.15A/µs ;
VIN = VIN,nom ; TA = 25°C
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 = 25°C
VO1: IO1 = IO,max, IO2 = IO,min
VO2: IO1 = IO,min; IO2 = IO,max
Note: Tolerance = ± 1%
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
Device
Symbol
Min
Typ
Max
Unit
All
All
-
32
35.0
34.0
36.0
-
V
V
All
-
90
-
110
%VO
SHEET 6 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Electrical Specifications (continued)
FEATURE SPECIFICATION
Parameter
Symbol
Min
Typ
Max
Unit
VENABLE
VENABLE
0
1.5
-
2.2
5.0
V
V
VENABLE
VENABLE
0
1.5
-
2.2
5.0
V
V
All
All
IENABLE
IENABLE
-
-
1.0
50
mA
µA
NSuffix
w/o NSuffix
VO
-
-
1.2
V
VO
-
-
1.2
V
Output Over Voltage Clamp
Conditions: VIN = VIN,nom; TA = 25°C
Characteristics: Hiccup mode;
auto-tracking wrt Vout
trim
5.0V
3.3V
2.5V
1.8V
1.5V
VO,CLAMP
VO,CLAMP
VO,CLAMP
VO,CLAMP
VO,CLAMP
5.7
3.8
2.8
2.0
1.7
6.0
3.9
3.0
2.2
1.8
6.5
4.3
3.4
2.4
2.1
V
V
V
V
V
Over-Temperature Shutdown
Note: 1. Tcomp(max) < 140 °C
2. Measured in the vicinity
of pin 3 and R29
All
TB
110
115
120
°C
Device
Symbol
Min
Typ
Max
Unit
Isolation Capacitance
All
-
-
680
-
pF
Isolation Resistance
All
-
10
-
-
MΩ
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)
Device
w/o NSuffix
NSuffix
ISOLATION SPECIFICATION
Parameter
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 7 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
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
Vi(+)
Ltest
12 uH
Cs 220 uF
ESR < 0.1 OHM
@ 20 ºC, 100 kHz
BATTERY
33 uF
ESR < 0.7 OHM
@ 20 ºC, 100 kHz
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
10 uF
SCOPE
RESISTIVE
LOAD
Vo(-)
Note: Use a 1µF 50V X7R ceramic capacitor and a 10µF 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: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 8 OF 19
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.
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
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
RTRIM-DOWN [kO]
32.39
15.09
8.95
5.80
3.89
2.60
1.67
0.98
0.44
0.00
Figure 4. External Trim resistor setup to decrease output for
AF; FG; FY and GM standard versions only.
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
SHEET 9 OF 19
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
RTRIM-DOWN [kO]
70.31
32.75
19.42
12.58
8.43
5.64
3.63
2.12
0.94
0.00
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
? [%}
-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
* DI/DT’s QD48T025033 Trim Equivalent
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 110°C.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 10 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves
ALQ15FG48
3.3V/2.5V Efficiency @ Balanced Current
90
85
85
EFFICIENCY (%)
EFFICIENCY (%)
3.3V/2.5V Efficiency @ PO1 = PO2
90
80
75
70
65
36Vin
60
48Vin
55
75Vin
80
75
70
36Vin
65
48Vin
60
50
75Vin
55
5
10
15
20
25
30
35
40
45
50
55
60
TOTAL OUTPUT POWER [W]
Figure 5. Efficiency at balanced power (PO1 = PO2) for
various input voltages; taken at TA=25ºC 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.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
0
2
4
6
8
LOAD CURRENT IO1 = IO2 [A]
10
Figure 6. Efficiency curve for balanced output current
(IO1 = IO2) at various input voltages; taken at TA=25ºC
with the converter mounted vertically and with 200LFM
airflow directed from Pin 3 to Pin 1.
Figure 8. Typical output current waveform under an Over
Current Condition. Output current scale at 0.5A/ mV.
SHEET 11 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves (continued)
ALQ15AF48 (5.0V / 3.3V) SERIES
5V/3.3V Efficiency @ PO1 = PO2
5V/3.3V Efficiency @ Balanced Current
95
95
90
85
80
75
70
65
36Vin
60
48Vin
55
75Vin
EFFICIENCY (%)
EFFICIENCY (%)
90
85
80
75
36Vin
70
48Vin
65
50
75Vin
60
5
10
15 20 25
30
35
40 45 50
55 60
0
1
2
3
4
5
LOAD CURRENT IO1 = IO2 [A]
TOTAL OUTPUT POWER [W]
Figure 9. Efficiency at balanced power (PO1 = PO2) for
various input voltages; taken at TA=25ºC with the
converter mounted vertically and with 100LFM airflow
directed from Pin 3 to Pin 1.
6
7
Figure 10. Efficiency curve for balanced output current
(IO1 = IO2) at various input voltages; taken at TA=25ºC
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 @ Balanced Current
3.3V/1.8V Efficiency @ PO1 = PO2
90
90
85
80
75
70
65
36Vin
60
48Vin
55
75Vin
50
5
10
15 20 25
30 35
40
45 50
55 60
TOTAL OUTPUT POWER [W]
Figure 11. Efficiency at balanced power (PO1 = PO2) for
various input voltages; taken at TA=25ºC with the
converter mounted vertically and with 300LFM airflow
directed from Pin 3 to Pin 1.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
EFFICIENCY (%)
EFFICIENCY (%)
85
80
75
70
36Vin
65
48Vin
60
75Vin
55
0
2
4
6
8
10
LOAD CURRENT IO1 = IO2 [A]
12
Figure 12. Efficiency curve for balanced output current
(IO1 = IO2) at various input voltages; taken at TA=25ºC
with the converter mounted vertically and with 300LFM
airflow directed from Pin 3 to Pin 1.
SHEET 12 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves (continued)
ALQ15GM48 (2.5V / 1.5V) SERIES
2.5V/1.5V Efficiency @ Balanced Current
90
90
85
85
80
75
70
65
36Vin
60
48Vin
55
75Vin
50
5
10 15
20 25 30 35 40 45
50 55 60
TOTAL POWER [W]
Figure 13. Efficiency at balanced power (PO1 = PO2) for
various input voltages; taken at TA=25ºC with the
converter mounted vertically and with 400LFM airflow
directed from Pin 3 to Pin 1.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
EFFICIENCY (%)
EFFICIENCY (%)
2.5V/1.5V Efficiency @ PO1 = PO2
80
75
70
36Vin
65
48Vin
60
75Vin
55
0
3
6
9
12
LOAD CURRENT IO1 = IO2 [A]
15
Figure 14. Efficiency curve for balanced output current
(IO1 = IO2) at various input voltages; taken at TA=25ºC
with the converter mounted vertically and with 400LFM
airflow directed from Pin 3 to Pin 1.
SHEET 13 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves (continued)
CURRENT VS. TEMPERATURE CURVES
Output Power VS Ambient Temperature (5V/3.3V)
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).
70
Total Power (W)
60
50
40
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
30
20
10
0
5
15
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
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).
Output Power VS. Ambient Temperature (3.3V/2.5V)
70
Total Power (W)
60
50
40
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
500 LFM
600 LFM
30
20
10
0
5
15
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 14 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Performance Curves (continued)
CURRENT VS. TEMPERATURE CURVES
Output Power VS. Ambient Temperature (3.3V/1.8V)
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).
70
Total Power (W)
60
50
40
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
500 LFM
600 LFM
30
20
10
0
5
15
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
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).
Output Power VS. Ambient Temperature (2.5V/1.5V)
70
Total Power (W)
60
50
40
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
500 LFM
600 LFM
30
20
10
0
5
15
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 15 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Young’s Stability Curves
ALQ15 3.3 volt channel
ALQ15 2v5 volt channel
1
Impedance magnitude ohms
Impedance magnitude ohms
1
0.1
0.01
1 .10
3
100
1 .10
3
1 .10
4
1 .10
0.1
0.01
1 .10
3
1 .10
4
5
100
Phase deg
Phase angle deg
3
4
1 .10
5
_______15°
_______30°
_______45°
_______60°
_______75°
_______90°
100
100
0
0
100
100
100
1 .10
1 .10
frequency Hz
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.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 16 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Young’s Stability Curves (continued)
ALQ15 1v5 volt channel
ALQ15 1v8 volt channel
1
Impedance magnitude ohms
Impedance magnitude ohms
1
0.1
0.01
1 .10
0.01
1 .10
3
100
1 .10
1 .10
frequency Hz
3
4
1 .10
100
1 .10
1 .10
frequency Hz
3
4
1 .10
5
1 .10
5
_______15°
_______30°
_______45°
_______60°
_______75°
_______90°
100
Phase deg
0
0
100
100
100
3
5
100
Pahse deg
0.1
1 .10
1 .10
frequency Hz
3
4
1 .10
5
100
1 .10
1 .10
frequency Hz
3
4
Figure 20. YSC Plots of 1V8 and 1V5 Output Channels.
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 17 OF 19
Technical Reference Notes
ALQ15XX48X Series
(Open Frame Dual Output Quarter Brick)
Mechanical Specifications
Parameter
Dimension
Device
All
Symbol
L
W
H
Min
-
Weight
Typ
2.30 [58.4]
1.48 [37.6]
0.50 [12.6]
-
PIN ASSIGNMENT
1
2
3
4
+VIN
ENABLE
-VIN
+VO2
5
6
7
Max
-
Unit
in [ mm ]
in [ mm ]
in [ mm ]
TBD
g [oz]
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]
7
1
2
C
L
3
6
5
4
TOPDOWN
PIN SIDE
SIDE
SIDE
FRONT
PIN SIDE UP
Figure 21. ALQ15 series mechanical outline ( inches [(mm ]).
MODEL: ALQ15 SERIES
MARCH 4, 2004 - REVISION 01
SHEET 18 OF 19
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 110°C and wave soldered at 260°C for less than 10 seconds.
When hand soldering, the iron temperature should be maintained at 425°C 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
ALQ15
v
w
A = 5.0V
F = 3.3V
F = 3.3V
G = 2.5V
F = 3.3V
G = 2.5V
Y = 1.8V
M = 1.5V
PIN LENGTH
OPTION
ENABLE LOGIC
48
x
“Blank” = Positive
"N" = Negative
-
SPECIAL
FEATURE
y
z
“Blank” = 5mm (Std)
“-6” = 3.7mm
“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