ALQ40_03 Datasheet, PDF (5/16 Pages) Astec America, Inc – Industry Standard ¼ Brick: 36V-75V Input / 50A Output Current

Technical Reference Notes
ALQ40/50 Series
(Open Frame Single Output Quarter Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Over Voltage Protection Range⁷
Over Temperature Range⁶
(AVG PCB TEMPERATURE)
Efficiency
V_IN = V_IN-NOM; I_O = I_O,MAX
T_A=25°C
Turn-On Response Time
V_IN = V_{IN-MIN to} V_IN-MAX
Switching Frequency
Dynamic Response:
∆I_O/∆t=0.1A / uS
C_O = 0uF
Device Symbol
Min
Typ
3V3 (F)
3.9
4.1
2V5 (G)
3.0
3.2
1V8 (Y)
2.0
2.4
1V2 (K)
1.4
1.6
All
110
-
3V3 (F)
η
2V5 (G)
η
1V8 (Y)
η
1V2 (K)
η
89.5
90.5
89.0
90.0
88.0
89.0
85.5
86.5
All
-
All
-
2V5
-
-
-
440
480
490
540
-
-
0.1
Load Change from I_O = 50% to 75% of 1V2/1V8
-
I_{O, Max}:
2V5/3V3
-
Peak Deviation Settling Time to V_{O, Nom}
All
-
-
100
-
125
-
250
Max
4.9
3.9
2.9
2.1
120
-
-
-
-
15
520
590
-
140
165
500
Unit
V
°C
%
%
%
%
ms
KHz
KHz
A/µs
mV
µs
Load Change from I_O = 50% to 25% of 1V2/1V8
-
I_{O, Max}:
2V5/3V3
-
Peak Deviation Settling Time to V_{O, Nom}
All
-
Output Overshoot
All
-
at T-on / T-off
Passive Resistive Full Load
-
100
140
mV
-
115
150
-
250
500
µs
-
-
5
%Vo
Note:
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