D050505T-1W_12 Datasheet, PDF (2/3 Pages) Crystek Corporation – 1W, FIXED INPUT, ISOLATED & UNREGULATED TWIN OUTPUT ULTRAMINIATURE SMD PACKAGE DC-DC CONVERTER

OUTPUT SPECIFICATIONS
Item
Test Conditions
Min. Typ. Max. Unit
Output power
0.1
Line regulation
For Vin change of ±1%
1
W
±1.2
10% to 100% load(5V output)
12.8 15
Load regulation
10% to 100% load(9V output)
10% to 100% load(12V output)
8.3 10 %
6.8 10
10% to 100% load(15V output)
6.0 10
Output voltage accuracy
See tolerance envelope graph
Temperature drift
100% full load
±0.03 %/°C
Ripple & Noise*
20MHz Bandwidth
50 75 mVp-p
Switching frequency Full load, nominal input
100
KHz
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
APPLICATION NOTE
RECOMMENDED REFLOW SOLDERING PROFILE
250
260^oC
10 Sec Max
200
22 0^o C
150
90 Sec Max
100
( >2 20^o C )
50
0
Time ( sec .)
Remark: The curve applies only to the hot air reflow soldering
TYPICAL CHARECTERISTICS
1) 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 could not be less than 10% of the full 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 (D_T –W2/W5).
2) Recommended testing circuit
If you want to further decrease the input/output ripple, an “LC” filtering network may
be connected to the input and output ends of the DC/DC converter, see (Figure1).
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.
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 sees (Table 1).
3) Output Voltage Regulation and Over-voltage Protection Circuit
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).
4) Overload Protection
Under normal operating conditions, the output circuit of these products has no
protection against overload. The simplest method is to connect a self-recovery fuse in
series at the input end or add a circuit breaker to the circuit.
5) Cannot use in parallel and hot swap
Operating Temp.(^oC)
RECOMMENDED CIRCUIT
L
L
Vin
Vo1
C
0V1
C
DC DC
L
Vo2
GND
C
0V2
(Figure 1)
Vo1
Vin
REG
0V1
DC DC
GND
Vo2
0V2
REG
Vo1
Vin
GND
0V1
DC DC
REG
Vo2
0V2
(Figure2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
Cin
Vout
Cout
(VDC)
(µF)
(VDC)
(µF)
5
4.7
5
4.7
12
2.2
9
2.2
-
-
12
1
-
-
15
0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5 watt
output.
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
D_T-1W
B/1-2012
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