75 Watt ASD-Q Single Series DC/DC Converters
Unless otherwise stated, these
apply for ambient temperature TA=23 2°C, nominal input voltage, and rated full load. (1)
Output Parameters
ASD75-24S3.3Q
ASD75-48S3.3Q
ASD75-24S5Q
ASD75-48S5Q
ASD75-24S12Q
ASD75-48S12Q
ASD75-24S15Q
ASD75-48S15Q
ASD75-24S24Q
ASD75-48S24Q
Model
Units
Output Voltage
3.3
5
12
15
24
VDC
Output Voltage
MAX
1
0
%
%
S etpoint Accuracy
Turn On Overshoot
TYP
TYP
MAX
0.005
0.01
0.003
0.005
Temperature Coefficient
%/°C
Noise (8)
R ipple
TYP
TYP
20
30
20
30
40
75
50
100
70
150
mV R MS
mV P-P
MIN
5
100
2
Load Current (4)
%
%
MAX
Load Transient Overshoot (7) TYP
Load Transient R ecovery
Time (6)
TYP
0.8
mS ec
Load R egulation (5)
Min-Max Load
Line R egulation
Vin = Min-Max
TYP
0.02
0.2
0.01
0.1
%
%
MAX
TYP
MAX
Overvoltage Protection (OVP)
Threshhold
OVP Type - Non-latching
Open Loop Overvoltage
Clamp
MIN
MAX
115
135
%
Output Current Limit
TYP
120
%
%
V out=90% of V out-nom
Output S hort Circuit Current
V out = 0.1 V
TYP
MAX
150
160
NOTES:
(9) When an external
switch is used, such as open collector
switch, logic high requires the switch to be high-impedance.
(1) Refer to the Astrodyne Application Notes for
terms, measurement circuits, and other information.
(2) Refer to the Astrodyne Application Notes for information on fusing.
For inrush current, refer to the above.
Switch leakage currents greater than 20 µA may be
trigger the to the logic-low state.
(10) Most switches would be suitable for logic
to
control, in case
there is a problem, you can make following estimation and then
leave some margin.
Whenopencollectorisusedforlogichigh,“OpenCircuitVoltage
(3) 33 µF capacitor connected to two “Input” pins. Then place
current sensor in series with 12 µH inductor between 33 µF and
the source. The
ripple current is measured over 5 Hz
A
at
Pin”, “Output Resistance” and “External Leakage
to 20 MHz bandwidth (current sensor is located between the
converter input pin and the 12 µH inductor).
Current Allowed for Logic High” are used to estimate the high
impedance requirement of open collector.
(4) Optimum performance is obtained when this power supply is
operated within the minimum to maximum load
No damage to module will occur when the output is operated at
less than minimum load, but the output voltage may contain a
low frequency component that may exceed output noise
.
When switch is used for logic low, “Open Circuit Voltage at On/
Pin”, “Output Resistance” and “LOW Logic Level” are used
to estimate the low impedance requirement of switch.
(11) Thermalimpedanceistestedwiththeconvertermountedvertically
and facing another printed circuit board 1/2 inch away. If
converter is mounted horizontally with no obstructions, thermal
impedance is approximately 10 °C/W.
(5) Load regulation is
as the output voltage change when
changing load current from maximum to minimum. The voltage
is measured at the output pin.
If heat sink is needed, apply a very thin layer of thermally
conductive grease on the metal base of converter, then properly
tighten the screws.
(6) Load Transient Recovery Time is
as the time for the
output to settle from a 50 to 75% or 25% step load change to a
1% error band of output voltage (rise time of step = 2µ Sec).
(12) Water Washability - TheseDC/DC converters are designed to
withstandmostsolder/washprocesses.Carefulattentionshould
(7) Load Transient Overshoot is
during a transient as
(8) Noise is measured per the Astrodyne Application Notes. Output
noise is measured with a 10 µF tantalum capacitor in parallel
with a 0.1 µF ceramic capacitor connected across the output to
CMN. Measurement bandwidth is 0-20 MHz.
as the peak overshoot
in the Note 6 above.
be used when assessing the applicability in your
manufacturing process. Converters are not hermetically sealed.
(13) Torque fasteners into threaded mounting inserts at 12 in. oz. or
less. Greater torque may result in damage to unit and void the
warranty.
c
375 Forbes Blvd. Mansfield, MA 02048
Ph: 800-823-8082
Fax: 508-339-0375
www.astrodyne.com
Email: sales@astrodyne.com
ASTRODYNE [ ASTRODYNE CORPORATION ]
