48ims7-24-24-9 Power-One, 48ims7-24-24-9 Datasheet - Page 8

• Manufacturer Part Number: 48ims7-24-24-9
• Description: Imx7/ Ims7 Dc-dc Series Data Sheet 7-watt Dc-dc Converters
• Manufacturer: Power-One

BCD20007 Rev AB
The outputs are protected against overvoltage by Zener
diodes. In the event of an overvoltage, the converter will shut
down and attempt to restart automatically. The main purpose of
this feature is to protect against possible overvoltage, which
could occur due to a failure in the feedback control circuit. The
converters are not designed to withstand external overvoltages
applied to the outputs.
Connection in Series or Parallel
The outputs of single- or double-output models can be
connected in series without any precautions, taking into
consideration that the output voltage should remain below 60 V
for SELV operation.
Both outputs of double-output models can be connected in
parallel without any precautions. Several converters (single- or
Thermal Considerations
If a converter, mounted on a PCB, is located in free, quasi-
stationary air (convection cooling) at the maximum ambient
temperature T
is operated at nominal input voltage and output power, the
case temperature T
temperature (see Mechanical Data) will approach the
indicated value T
relationship between T
conditions of operation and integration into a system. The
thermal conditions depend on input voltage, output current,
airflow, temperature of surrounding components and surfaces,
and the properties of the printed circuit board. T
therefore only an indicative value, and under practical
operating conditions, the ambient temperature T
higher or lower.
Short-Circuit Behavior
The current limitation shuts down the converter, when a short
circuit is applied to the output. It acts self-protecting, and
automatically recovers after removal of the overload condition.
Output Overvoltage Protection
Fig. 6
Overload switch-off (hiccup mode).
Caution: The case temperature T
point of case temperature T
circumstances exceed the specified maximum. The installer must
ensure that under all operating conditions T
limits stated in the table Temperature specifications.
100
V
70
o
0
[%]
A max
C max
(see table Temperature specifications) and
C
measured at the measuring point of case
after the warm-up phase. However, the
®
overload short-circuit condition
switch-off
A
C
and T
(see Mechanical Data) may under no
C
C
measured at the measuring
depends heavily on the
C
0.3 s
05041b
remains within the
t
A
may be
A max
Page 8 of 15
is
double-output models) with equal output voltage can be put in
parallel and will share their output current quite equally.
However, this may cause start-up problems and is only
recommended in applications, where one converter is able to
deliver the full load current, e.g., in true redundant systems.
Typical Performance Curves
Fig. 7
V
Fig. 8
V
outputs in parallel
Fig. 9
Cross load regulation (typ.) of double-output models (2 12
V). The cross-load effect is negligible.
o
o
versus I
versus I
IMX7/IMS7 DC-DC Series Data Sheet
13.5
12.5
11.5
V
V
5.0
4.5
4.0
3.0
5.5
3.5
13
12
11
10
13
12
11
V
o
o1
9
8
7
o
[V]
[V]
0
[V]
0
o
o
(typ.) of double-output models (2 12 V) with both
0.05
(typ.) of single-output models with V
I
I
o2
o2
0.4
0.2
= 0.03 A
= 0.3 A
0.10
7-Watt DC-DC Converters
0.8
0.15
0.4
0.20
1.2
0.6
0.25
www.power-one.com
1.6
0.8
0.3
05087a
05086a
05088a
o
= 5.1 V
I
I
o total
o
I
o1
[A]
[A]
[A]