OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of
±1%
10% to 100% load(5V output)
Load regulation
10% to 100% load(9V output)
10% to 100% load(12V output)
10% to 100% load(15V output)
Output voltage accuracy
Temperature drift
Ripple & Noise*
Switching frequency
100% full load
20MHz Bandwidth
Full load, nominal input
50
100
12.8
8.3
6.8
6.0
Test Conditions
Min.
0.1
Typ.
Max.
1
±1.2
15
10
10
10
±0.03
75
%
Unit
W
APPLICATION NOTE
See tolerance envelope graph
%/°C
mVp-p
KHz
*Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
Operating Temp.(
o
C)
RECOMMENDED REFLOW SOLDERING PROFILE
250
260 C
1 0 S ec M ax
o
RECOMMENDED CIRCUIT
Temperatur e (
o
C)
200
150
100
50
0
Time ( sec .)
22 0
o
C
L
L
Vo1
C
Vin
90 Sec Max
o
(>220 C)
C
DC DC
L
C
0V1
Vo2
0V2
GND
(Figure 1)
Vo1
Vin
REG
Remark: The curve applies only to the hot air reflow soldering
0V1
DC
GND
DC
REG
Vo2
0V2
Vo1
0V1
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
Vin
DC
GND
DC
REG
Vo2
0V2
(Figure2)
EXTERNAL CAPACITOR TABLE (TABLE 1)
Vin
Cin
Vout
Cout
(VDC)
(µF)
(VDC)
(µF)
5
12
-
-
4.7
2.2
-
-
5
9
12
15
4.7
2.2
1
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
Page 2 of 3
CRYSTEKCRYSTAL [ Crystek Corporation ]
