DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 1 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
15W&20W, wide input isolated & regulated
dual / single output DC/DC converter
Patent Protection RoHS
FEATURES
Wide range of input voltage (2:1)
Efficiency up to 90%
Isolation voltage :1.5K VDC
Output over-voltage, over-current and short
circuit protection
Operating temperature range: -40℃to +85℃
Six-sided metal shielding package
Meet CISPR22/EN55022 CLASS A
A2S (wring mounting) and A4S (35mm rail
mounting) products featuring anti-reverse
connection for input
Meet EN60950
International standard pin-out
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 series are applied to wide voltage range input situation such as data transmission device, battery
power supply device, telecommunication device ,distributed power supply system, remote control system, industrial robot system etc.
Selection Guide
Certification
Part No. ①
Input Voltage (VDC)
Output
Efficiency ③
(%,Min./Typ.)
@ Full Load
Nominal
(Range)
Max.②
Output Voltage
(VDC)
Output Current
(mA)(Max./Min.)
CE
VRA1205LD-15WR2
12
(9-18)
20
±5
±1500/±75
84/86
VRA1212LD-15WR2
±12
±625/±32
86/88
VRA1215LD-15WR2
±15
±500/±25
86/88
VRA1224LD-15WR2
±24
±313/±16
86/88
VRB1203LD-15WR2
3.3
4000/200
85/87
VRB1205LD-15WR2
5
3000/150
87/89
VRB1212LD-15WR2
12
1250/63
87/89
VRB1215LD-15WR2
15
1000/50
87/89
VRB1224LD-15WR2
24
625/32
88/90
VRA2405LD-15WR2
24
(18-36)
40
±5
±1500/±75
84/86
VRA2412LD-15WR2
±12
±625/±32
86/88
VRA2415LD-15WR2
±15
±500/±25
86/88
VRA2424LD-15WR2
±24
±313/±16
86/88
VRB2403LD-15WR2
3.3
4000/200
86/88
VRB2405LD-15WR2
5
3000/150
88/90
VRB2412LD-15WR2
12
1250/63
87/89
VRB2415LD-15WR2
15
1000/50
88/90
VRB2424LD-15WR2
24
625/32
88/90
VRA4805LD-15WR2
48
(36-75)
80
±5
±1500/±75
84/86
VRA4812LD-15WR2
±12
±625/±32
86/88
VRA4815LD-15WR2
±15
±500/±25
86/88
VRA4824LD-15WR2
±24
±313/±16
86/88
VRB4803LD-15WR2
3.3
4000/200
84/86
VRB4805LD-15WR2
5
3000/150
85/87
VRB4812LD-15WR2
12
1250/63
87/89
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 2 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
CE
VRB4815LD-15WR2
48
(36-75)
80
15
1000/50
88/90
VRB4824LD-15WR2
24
625/32
87/89
VRA1205LD-20WR2
12
(9-18)
20
±5
±2000/±100
84/86
VRA1212LD-20WR2
±12
±834/±42
86/88
VRA1215LD-20WR2
±15
±667/±34
86/88
VRA1224LD-20WR2
±24
±417/±21
86/88
VRB1203LD-20WR2
3.3
5000/250
84/86
VRB1205LD-20WR2
5
4000/200
87/89
VRB1212LD-20WR2
12
1667/84
87/89
VRB1215LD-20WR2
15
1333/67
87/89
VRB1224LD-20WR2
24
834/42
88/90
VRA2405LD-20WR2
24
(18-36)
40
±5
±2000/±100
84/86
VRA2412LD-20WR2
±12
±834/±42
86/88
VRA2415LD-20WR2
±15
±667/±34
86/88
VRA2424LD-20WR2
±24
±417/±21
86/88
VRB2403LD-20WR2
3.3
5000/250
84/86
VRB2405LD-20WR2
5
4000/200
88/90
VRB2412LD-20WR2
12
1667/84
87/89
VRB2415LD-20WR2
15
1333/67
88/90
VRB2424LD-20WR2
24
834/42
88/90
VRA4805LD-20WR2
48
(36-75)
80
±5
±2000/±100
84/86
VRA4812LD-20WR2
±12
±834/±42
86/88
VRA4815LD-20WR2
±15
±667/±34
87/89
VRA4824LD-20WR2
±24
±417/±21
87/89
VRB4803LD-20WR2
3.3
5000/250
84/86
VRB4805LD-20WR2
5
4000/200
86/88
VRB4812LD-20WR2
12
1667/84
87/89
VRB4815LD-20WR2
15
1333/67
88/90
VRB4824LD-20WR2
24
834/42
87/89
Note:
①Series with suffix “H” are heat sink mounting; series with suffix “A2S” are chassis mounting，with suffix “A4S” are DIN-Rail mounting, for example
VRB2405LD-20WHR2A2S is chassis mounting of with heat sink,VRB2405LD-20WR2A4S is DIN-Rail mounting of without heat sink;If the application has a higher
requirement for heat dissipation, you can choose modules with heat sink;
②Absolute maximum rating without damage on the converter, but it isn't recommended;
③The efficiency of A2S (wiring type) and A4S (rail type) products is 2% lower than the above-mentioned value due to the reverse connection protection for
input;
④The capacitive loads of positive and negative outputs are identical.
Input Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Input Current (full load / no-load)
15W
12VDC input
3.3VDC/5VDC output
--
1454/60
1489/75
mA
others
--
1421/25
1454/40
24VDC input
3.3VDC/5VDC output
--
727/35
745/50
others
--
717/20
727/35
48VDC input
3.3VDC/5VDC output
--
364/35
373/50
others
--
356/15
364/25
Input Current (full load / no-load)
20W
12VDC input
3.3VDC/5VDC output
--
1938/60
1985/75
others
--
1896/25
1940/40
24VDC input
3.3VDC/5VDC output
--
969/40
992/50
others
--
948/20
970/35
48VDC input
3.3VDC/5VDC output
--
485/25
497/40
others
--
474/10
485/25
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 3 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Reflected Ripple Current
12VDC input
--
30
--
24VDC input
--
30
--
48VDC input
--
30
--
Input impulse Voltage (1sec.
max.)
12VDC input
-0.7
--
25
VDC
24VDC input
-0.7
--
50
48VDC input
-0.7
--
100
Input Filter
Pi filter
Starting Time
Nominal input & constant resistance load
--
10
--
ms
Ctrl*
Module switch on
Ctrl suspended or connected to TTL high level
(2.5-12VDC)
Module switch off
Ctrl pin connected to GND or low level (0-1.2VDC)
Input current when switched off
--
1
--
mA
Hot Plug
Unavailable
Note: * The voltage of Ctrl pin is relative to input pin GND.
Output Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Output Voltage Accuracy
Positive output
--
±1
±3
%
Negative output
Balance of Output Voltage
Dual output, balanced load
--
±0.5
±1
Line Regulation
Full load, the input voltage is from low voltage to
high voltage
--
±0.2
±0.5
Load Regulation
5%-100% load
--
±0.5
±1
Cross Regulation
Dual output, main circuit with 50% load,
auxiliary circuit with 10%-100% load
--
--
±5
Transient Recovery Time
25% load step change
--
300
500
µs
Transient Response Deviation
--
±3
±5
%
Temperature Drift Coefficient
Full load
--
±0.02
--
%/℃
Ripple & Noise *
20MHz bandwidth
--
70
100
mV p-p
Trim
--
±10%Vo
--
VDC
Over-voltage Protection
3.3VDC output
--
3.9
--
5VDC output
--
6.2
--
12VDC output
--
15
--
15VDC output
--
18
--
24VDC output
--
30
--
Over-current Protection
Input voltage range
--
150
--
%
Short circuit Protection
Hiccup, Continuous, self-recovery
Note: *Ripple and noise are measured by “parallel cable” method, please see DC-DC Converter Application Notes for specific operation.
General Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Isolation Voltage
Input-output, with the test time of 1 minute and the
leak current lower than 1mA
1500
--
--
VDC
Isolation Resistance
Input-output, isolation voltage 500VDC
1000
--
--
MΩ
Isolation Capacitance
Input-output,
100KHz/0.1V
15W
24VDC output
--
2000
--
pF
others
--
1000
--
20W
--
1000
--
Operating Temperature
see Fig. 1
-40
--
+85
℃
Storage Temperature
-55
--
+125
Storage Humidity
Non-condensing
5
--
95
%RH
Max. Casing Temperature
Within the operating temperature curve
--
--
+105
℃
Pin Welding Resistance
Temperature
Welding spot is 1.5mm away from the casing, 10
seconds
--
--
+300
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 4 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Vibration
10-55Hz, 10G, 30 Min. along X, Y and Z
Switching Frequency
PWM mode
--
300
--
KHz
MTBF
MIL-HDBK-217F@25℃
1000
--
--
K hours
Physical Specifications
Casing Material
Aluminum alloy
Dimension
Without heat sink
Horizontal package
50.80*25.40*11.80mm
A2S wiring package
76.00*31.50*21.20 mm
A4S rail package
76.00*31.50*25.80 mm
With heat sink
Horizontal package
50.80*25.40*16.30mm
A2S wiring package
76.00*31.50*25.10 mm
A4S rail package
76.00*31.50*29.70 mm
Weight
Without heat sink
Horizontal package/A2S wiring package/A4S rail package
28.00g/50.00g/70.00g(Typ.)
With heat sink
Horizontal package/A2S wiring package/A4S rail package
36.00g/58.00g/78.00g(Typ.)
Cooling Method
Free air convection
EMC Specifications
EMI
CE
CISPR22/EN55022 CLASS A (Bare component)/
CLASS B (see Fig.3-②for recommended circuit)
RE
CISPR22/EN55022 CLASS A (Bare component)/
CLASS B (see Fig.3-②for recommended circuit)
EMS
ESD
IEC/EN61000-4-2 Contact ±4KV
perf. Criteria B
RS
IEC/EN61000-4-3 10V/m
perf. Criteria A
EFT
IEC/EN61000-4-4 ±2KV (see Fig.3-①for recommended circuit)
perf. Criteria B
Surge
IEC/EN61000-4-5 ±2KV (see Fig.3-①for recommended circuit)
perf. Criteria B
CS
IEC/EN61000-4-6 3 Vr.m.s
perf. Criteria A
Voltage dips, short interruptions
and voltage variations immunity
IEC/EN61000-4-29 0-70%
perf. Criteria B
Product Characteristic Curve
15W
0
20
40
60
80
100
120
-40 0 40 120
Saf e O per ating A rea
65 85
with heat sink
without heat sink
70
Output Powe r Percentage(%)
Oper ating Temperatur e( )
℃
20W
0
20
40
60
80
100
120
-40 0 40 120
Safe O per ating Area
60 85
with heat sink
without heat sink
65
Output Power Percentage(%)
Oper ating Temperatur e( )
℃
Fig. 1
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 5 of 9
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Design Reference
1. Typical application
All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery.
If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors Cin and Cout or
select capacitors of low equivalent impedance provided that the capacitance is no larger than the max. capacitive load of the product.
DC DC
Vin
GND
+Vo
0V
Cin
Cout
Vin
GND
+Vo
0V
Cin
Cout
DC DC
-Vo
Cout
Dual
Single
Fig. 2
Vout(VDC)
Cin(µF)
Cout(µF)
Dual
±5
100
220
±12/±15
100
±24
47
Single
3.3/5
100
470
12/15
220
24
100
2. EMC solution-recommended circuit
LDM1
②
C0
MOV
FUSE
①
C1
V in
GND
+
Vin
GND
+Vo
-Vo
(0V)
DC/DC
CY1
CY2
C2
LOAD
Fig. 3
Notes: Part ①in the Fig. 3 is used for EMS test and part ②for EMI filtering;
selected based on needs.
Parameter description
型号
Vin:12V
Vin:24V
Vin:48V
FUSE
Choose according to actual input
current
MOV
--
S14K35
S14K60
C0
680µF/25V
330µF/50V
330µF/100V
C1
1µF/50V
1µF/50V
1µF/100V
C2
Refer to the Cout in Fig.2
LDM1
4.7µH
CY1、CY2
1nF/2KV
EMC solution-recommended circuit PCB layout
Fig. 4
Note: the min. distance of the bonding pads between input & output isolation capacitors (CY1/CY2) shall be ≥2mm.
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 6 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
1.Application of Trim and calculation of Trim resistance
0V
R2
R1
R3
Vref
RT
Trim
+Vot
0V
R2
R1
R3
Vref
RT
Trim
+Vot
Trim up Trim down
Applied circuits of Trim (Part in broken line is the interior of models)
Calculation formula of Trim resistance:
up: a= Vref
Vo’-Vref R1
R =TaR2
R -a2-R3
down: a= Vref
Vo’-Vref R2
R =TaR1
R -a1-R3
Note: Leave open if not used. RT: Resistance of Trim. a: User-defined
parameter, no actual meanings.
Vout(V)
R1(KΩ)
R2(KΩ)
R3(KΩ)
Vref(V)
3.3
4.801
2.863
15
1.24
5
2.883
2.864
10
2.5
12
10.971
2.864
17.8
2.5
15
14.497
2.864
17.8
2.5
24
24.872
2.863
20
2.5
3. It is not allowed to connect modules output in parallel to enlarge the power
4. For more information about Mornsun EMC Filter products, please visit www.mornsun-power.com to
download the Selection Guide of EMC Filter
Dimensions and Recommended Layout(without heatsink)
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 7 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Dimensions (with heatsink)
A2S Wiring Package Dimensions(without heatsink)
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 8 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
A2S Wiring Package Dimensions(with heatsink)
A4S Rail Package Dimensions(without heatsink)
DC/DC Converter
VRA(B)_LD-15WR2 & VRA(B)_LD-20WR2 Series
2015.08.11-B/1 Page 9 of 9
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
A4S Rail Package Dimensions(with heatsink)
Notes:
1. Packing information please refer to Product Packing Information which can be downloaded from www.mornsun-power.com.
Horizontal Packing Bag Number : 58200035(without heatsink),58200051(with heatsink), A2S/A4S Packing Bag Number: 58220022;
2. Recommend to use module with more than 5% load, if not, the ripple of the product may exceeds the specification, but does not
affect the reliability of the product;
3. The recommended unbalance degree of the dual output module load is ≤±5%; if the degree exceeds ±5%, than the product
performance cannot be guaranteed to comply with all parameters in the datasheet. Please contact our technicians directly for
specific information;
4. The maximum capacitive load offered were tested at nominal input voltage and full load;
5. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75% with nominal
input voltage and rated output load;
6. All index testing methods in this datasheet are based on our Company’s corporate standards;
7. The performance parameters of the product models listed in this manual are as above, but some parameters of non-standard model
products may exceed the requirements mentioned above. Please contact our technicians directly for specific information;
8. We can provide product customization service;
9. Specifications are subject to change without prior notice.
Mornsun Guangzhou Science & Technology Co., Ltd.
Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, P. R. China
Tel: 86-20-38601850-8801 Fax: 86-20-38601272 E-mail: info@mornsun.cn