ALQ25B50_03 Datasheet, PDF (5/11 Pages) Astec America, Inc – Industry Standard ¼ Brick: 300W DC Transformer

Technical Reference Notes
ALQ25B50 Bus Converter
DC Transformer
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Device Symbol
Min
Typ
Max
Unit
Efficiency
All
η
94
96
-
%
V_IN = V_IN-MIN to V_IN-MAX
I_O = 13.5A Resistive load
T_A = 25°C
Turn-On Response Time
from Active Enable to
All
-
-
-
4.0
ms
90% V_O (T_A = 25°C)
Output Overshoot at T-on / T-off
All
-
-
-
200
mV
Ta=25°C
Passive Resistive Full Load
Note: 3. The modules will shutdown once the input voltage OVP threshold is attained. Restart is possible once the
fault is removed and the input voltage is cycled.
4. See Figure 1 for the Input Reflected Ripple Current test measurement setup.
5. See Figure 2 for the Output Ripple test measurement setup.
6. In an event of an over current condition - the output will be in shutdown mode to prevent excessive heating
that could eventually damage the converter. Restart is possible once the input voltage or Enable is cycle
for a 10 second wait period.
7. Output of the module will be terminated once the average PCB temp reaches the OTP range. Normal
operation resumes once the temperature falls below the OTP range.
FEATURE SPECIFICATION
Parameter
Device Symbol
Min
Output Enable ON/OFF
Negative Enable ("N" suffix)
Enable Pin voltage for Module ON
N
-
0
Module OFF suffix
-
2.00
Positive Enable (No suffix)
Enable Pin voltage for Module ON
No
-
2.00
Module OFF suffix
-
0
Typ
Max
Unit
-
0.8
V
-
5.0
V
-
5.0
V
-
0.8
SAFETY APPROVAL
The ALQ25B50 series have been certified through:
• UL + cUL 60950, Third Edition - Recognized
• EN 60950 through TUV-PS
• Basic Insulation
• UL94V-0 flammability rating
MODEL: ALQ25B50 SERIES
SEPTEMBER 11, 2003 - REVISION A (PRELIMINARY)
SHEET 5 OF 11