WRA1205CS-3W Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – DUAL/SINGLE OUTPUT DC-DC CONVERTER

OUTPUT SPECIFICATIONS
Item
Test Conditions
Min Typ Max Units
Output Power
See below products program
Positive voltage accuracy Refer to recommended circuit
0.3
3
W
±1
±3
Negative voltage accuracy Refer to recommended circuit
Load Regulation
10% To 100% Load (WRB_CS-3W)
10% To 100% Load (WRA_CS-3W)*
Line Regulation
Input Voltage From Low To High
Temperature drift (Vout) Refer To Recommended Circuit
±3
±5
±0.5 ±0.75 %
±0.5 ±1.0
±0.2 ±0.5
±0.03 %/°C
Ripple & Noise**
20MHz Bandwidth
50 100 mVp-p
Switching Frequency
100% Load, Input Voltage
300
KHz
*Dual output models unbalanced load (25/100%): ±5%Max.
**Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. See below recommended circuits for more details.
TYPICAL TEMPERATURE CURVE
Operating Temp.( C )
OUTLINE DIMENSIONS FOOTPRINT DETAILS
First Angle Projection
123 5678
(Bottom View)
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
dia m et er: 1 . 0 0m m ( 0. 03 9 i n c h )
Dual Output & Single Output
22.00 ( 0.866 )
(Side View)
Note:
Unit:mm(inch)
Pin secti on:0.50*0.30mm(0.020*0.012inch)
Pin secti on tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
35
FOOTPRINT DETAILS
Pin
Single
Dual
1
GND
GND
2
Vin
Vin
3
CTRL
CTRL
5
NC
NC
6
+Vo
+Vo
7
0V
0V
8
CS
- Vo
NC:No Connection
Recommended 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 (Figure 1).
Single Output
Vc
D1 Ic _R
3
Vi n
Li n ₂
Cin
G ND
1
6
+Vo
8
Co ut
Cs
0V
7
Dual Output
Vc
Vin
D1 Ic R
Lin ₂
3
Cin
GND
1
6 ^Lout
+ Vo
Cout
7
Lout
8
0V
Cout
- Vo
(Figure 1)
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).
General: Cin: 12V 100uF
24V 10uF-47uF
Cout: 100uF(Typ.)
Lin: 4.7μH -120μH
Lout: 2.2μH-10μH
Cs: 10uF-47uF
External Capacitor Table(Table 1)
Single Vout Cout (uF) Dual Vout Cout (uF)
(VDC)
(Max) (VDC) (Max)
5
1000
±5
680
9
680
±9
470
12
470
±12
330
15
330
±15
220
Input current
While using unstable power source, please
ensure the output voltage and ripple voltage do
not exceed indexes of the converter. The
preceding power source must be able to provide
for converter sufficient starting current Ip (Figure
2). General: Ip ≤1.4*Iin-max
Ip
APPLICATION NOTE
CTRL Terminal
When open or high impedance, the converter work well; When this pin is ‘high’; the converter
shutdown; It should be note that the input current (Ic) should between 5-10mA, exceeding the
maximum 20mA will cause permanence damage to the converter。The value of R Can be derived
as follows:
R= ^Vc-VD-1.0
Ic
Input Voltage
Range
Input Voltage (V)
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
WRA_CS-3W & WRB_CS-3W A/1-2008 Page 2 of 2