WRD-YS-1W&WRD-YS-2W
Series
OUTPUT SPECIFICATIONS
Parameter
Main output voltage accuracy
Vice output voltage accuracy
Load regulation
Line regulat ion
Temperature drift (Vout)
Ripple & Noise**
Switching frequency
TYPICAL TEMPERATURE CURVE
Min
Typ.
±1
±3
±0.5
±0.2
Test conditions
Refer to recommended circuit
Refer to recommended circuit
10% to 100% full load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
100% load, input voltage range
Max
±3
±5
±1 *
±0.5
±0.03
Unit
%
%
%
%
%/℃
mVp-p
50
300
100
KHz
*Dual output models unbalanced load: ±5%.
** Test ripple and noise by "parallel cable" method. See detailed operation instructions at Testing of Power
Converter section, application notes.
COMMON SPECIFICATIONS
Parameter
Storage humidity range
Operating temperature
Storage temperature
Lead temperature
Temp.rise at full load
No-load power consumption
RECOMMENDED CIRCUIT
Min.
Typ.
Max.
95
-40
-55
85
125
300
15
0.1
Plastic(UL94-V0)
Continuous
Free air convection
1000
5.8
K hours
Conditions
Units
%
℃
1.5mm from case for 10 seconds
W
Case material
Short circuit protection
Cooling
MTBF
Weight
g
APPLICATION NOTE
1) CS Pin
By connecting a
low ESR capacitor between
this
terminal and
the pin-7(Figure
1),
the output
ripple and noise may be further improved. Generally, the capacitance is no greater than 47uF.
2) Requirement on Output Load
To ensure
output
the
load
this module
is
not
the
can
operate
10%
efficiently
of
the
and
full
reliably,
load,
sharply.
loading,
If
If
During
the
operation,
load
the minimum
is
less
than
is very
for
EXTERNAL CAPACITOR TABLE (TABLE 1)
the
input/output ripple, you can
increase capacitance properly
Vout
(VDC)
5
less
output
than
actual
specified
load,
add
lower
an
output
ripple may
resistor
increase
as
extra
the actual output
or
contact
our
power
minimum
small,
please
other
appropriate
power
company
products.
2W :Cout
(μF)
680
470
330
220
3) Recommended Circuit
If you want to
further decrease
or choose capacitors with low ESR (Figure 1).
However, the capacitance of the output filter capacitor must be proper. If the capacitance is too
big, a startup problem might
reliable
operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1)
Cin:
Lin:
5V & 12V
24V & 48V
10μH-120μH
Cout: 100μF(TYP)
4) Input current
While using unstable power source, please ensure the output voltage and ripple voltage do not
exceed
provide
indexes
for
Ip ≤1.4*Iin-max
of
the
converter.
The
preceding
power
source
must
be
able
to
100μF
10μF-47μF
arise. For every
channel
of
output, provided
the
safe
and
1W : Cout
(μF)
470
330
220
100
9
12
24
When the environment temperature is higher than 71° C, the product
71°
output power should be less than 60% of the rated power.
tha
No parallel connection or plug and play.
converter sufficient starting current Ip (Figure 2). General:
5) No parallel connection or plug and play
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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