ALQ25B50_03 Datasheet, PDF (4/11 Pages) Astec America, Inc – Industry Standard ¼ Brick: 300W DC Transformer

Technical Reference Notes
ALQ25B50 Bus Converter
DC Transformer
Electrical Specifications (continued)
INPUT SPECIFICATION
Parameter
Device Symbol Min
Typ
Max
Unit
Operating Input Voltage
All
V_IN
42
48
53
V_DC
Input Under-Voltage Lock-out
All
T_ON Threshold
41
-
43
Vdc
T_OFF Threshold
39
-
41
Input Over Voltage Shutdown
Protection³
Maximum Input Current¹
Conditions: V_IN =V_{IN, MIN}
I_O = I_{O, MAX}; T_A = 25 ºC
Maximum Input Current
All
-
All
I_IN,max
-
All
60
-
Vdc
-
6.6
A
0.17
A
I_O = 0A
Input Reflected Ripple Current⁴
All
I_I1/ I_I2
-
5
-
mA_RMS
Conditions: P_O = P_{O, MAX}; T_A = 25 ºC
BW: 5Hz to 20MHz
OUTPUT SPECIFICATIONS
Parameter
Output Voltage Set point
V_IN = V_{IN, NOM;} I_O =I_O,MIN
Output Regulation Ta=25 ºC
Line: V_IN = V_{IN, MIN} to V_{IN, MAX}
I_O=_{IO, MIN} = 0A
Load: I_O = I_{O, MIN} to I_{O, MAX}
V_IN=V_{IN, NOM} = 48V
Temperature: Ta = 0 ºC to +85 ºC
Ripple and Noise⁵
Peak-to-Peak: (5Hz to 20MHz)
T_A = 25°C, I_O = I_{O, MAX}
V_IN=V_{IN, NOM} = 48V
Other conditions
Output Current²
External Load Capacitance
Capacitor ESR
Output Current-limit Inception⁶
V_OUT = 90% V_{O, SET}
Over Temperature Range⁷
(Average PCM Temperature)
Switching Frequency
Device Symbol
All
V_O,SET
Min
11.85
Typ
12.00
All
-
10.25
-
All
-
-
-
All
-
-
-
All
-
-
80
All
-
-
-
All
I_O
0
-
All
-
-
-
-
-
All
I_O
26.5
-
All
110
115
All
-
780
800
Max
Unit
12.15
Vdc
13.60
± 5.5
±7.5
Vdc
%V_O
%V_O
130
200
25
2,000
-
40
120
820
mVp-p
mVp-p
A
µF
mΩ
A
°C
KHz
MODEL: ALQ25B50 SERIES
SEPTEMBER 11, 2003 - REVISION A (PRELIMINARY)
SHEET 4 OF 11