SENSITRON
SEMICONDUCTOR
TECHNICAL DATA
DATA SHEET 1103, REV. D
W – 1W/2W Series
POWER DERATING
Ambient Temperature(℃)
Outline Dimensions and Pin Functions
Pin
1
2
3
5
6
7
8
Function
GND
Vin
NC
NC
+Vo
0V
CS
Note
Input ground
Input positive
Suspend
Suspend
Output positive
Output ground
External capacitor
anode of the capacitor), the output ripple and
noise may be further improved.
③、
When the
output power is down to 1W,
it
is suggested to connect a capacitor(Cs) between
the CS and the 0V. Generally, the capacitance is
no greater than 100uF (see
Figure 1
).
④、
When the
output power is down to 1W,
it
is suggested to connect a capacitor(Cs) between
the CS and the 0V,
otherwise perpetual
damage might be done. (See T
able 1
)
Table 1
12V、15V
V
out
5V
Cs
47uF-100uF
22uF-47uF
B
B
SIP
- 4
All dimension in mm
Tolerance: case +0.5
Tolerance: pin +0.25
APPLICATION NOTE
①、
NC is for internal use of the DC/DC converter.
Be sure to suspend it without connecting any
peripheral circuits.
②、By
connecting a low ESR capacitor between
this terminal and the pin-7 (connecting to the
⑦、Output
Load
In order to ensure the product operate efficiently
and reliably, in addition to a max load (namely full
load), a min load is specified for this kind of
DC/DC converter. Make sure the specified range
of input voltage is not exceeded, the minimum
output load
no less than 25% (namely:
≥100mA)
U
⑤、
Recommended Circuit
All DC/DC converters of this series have been
tested. This product cannot be tested with no
load. Be careful
not to perform the test under
no load!!!
For further reducing the ripple,
increase the capacitance of the output capacitor
(C
out
) appropriately (see Table 2).
⑥、
Input Current
Nominal input voltage range. The input current of
the power supply must be sufficient to the startup
current (Ip) of the DC/DC module (see Figure 2)
full load, the product never work under no
load!
If the actual load is less than the specified
min load, the output ripple will increase sharply
while its efficiency and reliability will reduce
greatly. If the actual output power is very small, a
proper resistor is needed at the output end in
order to increasing the load, or contact our
U
U
B
B
U
•
221 West Industry Court
•
Deer Park, NY 11729-4681
•
Phone (631) 586-7600
•
Fax (631) 242-9798
•
•
World Wide Web Site - http://www.sensitron.com
•
E-Mail Address - sales@sensitron.com
•
SENSITRON
SEMICONDUCTOR
TECHNICAL DATA
DATA SHEET 1103, REV. D
W – 1W/2W Series
company for other lower output power products.
⑧、No
parallel connection or plug and play.
Table 2：
Vin
5V&12
V
24V&4
8V
Note
C
in
B
B
+Vin
+Vo
C
out
(0℃½+70℃)
B
B
C
out
(-40℃½+85℃)
B
B
Cin
DC-DC
CONVERTER
Load
Cout
100uF/25V
Philips
No.03790047
10uF/100V
Philips
No.03759109
GND
0V
100uF/25V
47uF/20V
Philips
AVX Part No.
No.03790047 TAJD476K020X
Cs
To get more ideal ripple value under high/low
temperatures, please select a low-ESR tantalum
capacitor with a wider range of operating temperature or
an OS-CON capacitor.
Figure 1
Input Current(A)
Ip
Input Volt age Range
Input Voltage(V)
Figur e 2
•
221 West Industry Court
•
Deer Park, NY 11729-4681
•
Phone (631) 586-7600
•
Fax (631) 242-9798
•
•
World Wide Web Site - http://www.sensitron.com
•
E-Mail Address - sales@sensitron.com
•
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