A1209LT-2W RSG [RSG Electronic Components GmbH], A1209LT-2W Datasheet - Page 2

• Manufacturer Part Number: A1209LT-2W
• Description: FIXED INPUT ISOLATED & UNREGULATED 2W DUAL OUTPUT UTRALMINIATURE SMD PACKAGE
• Manufacturer: RSG [RSG Electronic Components GmbH]

Requirement on output load
To ensure this module can operate efficiently and reliably, a minimum load is
specified for this kind of DC/DC converter in addition to a maximum load
(namely full load). During operation, make sure the specified range of input
voltage is not exceeded, the minimum output load is not less than 10% of the
full load, and that this product should never be operated under no load! If the
actual output power is very small, please connect a resistor with proper
resistance at the output end in parallel to increase the load, or use our
company’s products with a lower rated output power (A_T-1W series).
ELECTRONIC COMPONENTS
TYPICAL CHARACTERISTICS
RECOMMENDED REFLOW SOLDERING PROFILE
PIN CONNECTIONS
OUTLINE DIMENSIONS& RECONMENDED FOOTPRINT DETAILS
Note: All Pins on a 2.54mm(0.1) pitch; All Pin Widths are 0.60 mm(0.02);
Tolerances:±0.15mm(0.006); Unit: mm(inch)
APPLICATION NOTE
MORNSUN reserves the copyright For any design change and upgrade, we will not make any prior notification
Functio n
P in
1.27
(0.05)
RSG
GND
14
1 2 3
1
250
200
150
100
2.54
(0.1 0.004)
13
50
0
17.78
15.24
12
±
±0.1
■
Vin
2
10
(0.7)
5 6 7
(0.6)
RSG Electronic Components GmbH
Tel. [phone]
Änderungen vorbehalten / subject to change without notice
9
N C
3
8
-Vo
5
0.25
(0.01)
Time (sec. )
0V
6
1.30 0.13
(0. 05 0.005)
+Vo
90
(>220 )
7
±
±
Sec
■
Fax [phone]
℃
Max
NC
8
Ambient Temperature
Peak .Temp
220℃
NC
9
10
Sec
- Vo
10
Max
■
260℃
Sprendlinger Landstr. 115
12
NC
A
(
C
5.00 MAX
NC
)
13
■
。
[e-mail]
14
NC
Filtering
In some circuits which are sensitive to
noise and ripple, a filtering capacitor may
be added to the DC/DC output end and
input end to reduce the noise and ripple.
However, the capacitance of the output
filter capacitor must be proper. If the
capacitance is too big, a startup problem
might arise. For every channel of output,
provided the safe and reliable operation is
ensured, the greatest capacitance of its
filter
CAPACITOR TABLE. To get an extremely
low ripple, an “LC” filtering network may be
connected to the input and output ends of
the DC/DC converter, which may produce a
more significant filtering effect. It should
also be noted that the inductance and the
frequency of the “LC” filtering network
should be staggered with the DC/DC
frequency to avoid mutual interference
(Figure 1).
Output
Over-voltage Protection Circuit
Overload Protection
Under normal operating conditions, the
output circuit of these products has no
protection
short-circuits. The simplest method is to
connect a self-recovery fuse in series at the
input end or add a circuit breaker to the
circuit.
EXTERNAL CAPACITOR TABLE
The simplest device for output voltage
regulation, over-voltage and over-current
protection is a linear voltage regulator
with overheat protection that is connected
to the input or output end in series
(Figure2).
It’s not recommend to connect any
external capacitor in the application
field with less than 0.5 watt output。
GND
12VDC
5VDC
Vin
V
--
in
■
capacitor
D-63069 Offenbach/Germany
C
■
Voltage
capacitor
www.rsg-electronic.de
External
L
against
4.7uF
2.2uF
A/1-2007
--
(Figure 1)
(Figure 2)
DC
sees
DC
Regulation
over-current
12VDC
15VDC
5VDC
9VDC
the EXTERNAL
V
Page 2 of 2
out
L
L
C
C
capacitor
External
0.47uF
4.7uF
2.2uF
1uF
+Vo
0V
and
-Vo
and