DC/DC Converter
VRB_LD-30WR3 Series
2018.12.05-A/3 Page 1 of 5
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30W isolated DC-DC converter
Wide input and regulated single output
Patent Protection RoHS
FEATURES
Wide 2:1 input voltage range
High efficiency up to 90%
No-load power consumption as low as 0.14W
I/O isolation test voltage 1.5k VDC
Output short-circuit, over-voltage, over-current
protection
Operating ambient temperature range: -40℃~
+80℃
Meets CISPR32/EN55032 CLASS A EMI without
extra components
Six-sided metal shielded package
EN60950 approved
VRB_LD-30WR3 series of isolated DC-DC converter products with a wide 2:1 input voltage and feature efficiencies of up to 90%, input to
output isolation is tested with 1500VDC and the converters safely operate ambient temperature of -40℃to +80℃, output short-circuit,
over-voltage, over-current protection. They meet CLASS A of CISPR32/EN55032 EMI standards without external components and they are
widely used in applications such as data transmission device, battery power supply device, tele-comunication device, distributed power
supply system, hybrid module system, remote control system, industrial robot fields.
Selection Guide
Certification
Part No.
Input Voltage (VDC)
Output
Full Load
Efficiency②(%)
Min./Typ.
Nominal
(Range)
Max.①
Voltage
(VDC)
Current (mA)
Max./Min.
CE
VRB2403LD-30WR3
24
(18-36)
40
3.3
6000/0
83/85
VRB2405LD-30WR3
5
6000/0
86/88
VRB2409LD-30WR3
9
3333/0
84/86
VRB2412LD-30WR3
12
2500/0
86/88
VRB2415LD-30WR3
15
2000/0
88/90
VRB2424LD-30WR3
24
1250/0
88/90
VRB4803LD-30WR3
48
(36-75)
80
3.3
6000/0
84/86
VRB4805LD-30WR3
5
6000/0
86/88
VRB4812LD-30WR3
12
2500/0
86/88
VRB4815LD-30WR3
15
2000/0
87/89
VRB4824LD-30WR3
24
1250/0
87/89
Notes：
①Exceeding the maximum input voltage may cause permanent damage;
②Efficiency is measured at nominal input voltage and rated output load.
Input Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Input Current (full load / no-load)
24VDC nominal input series,
nominal input voltage
3.3VDC output
--
1471/60
1507/100
mA
5VDC output
--
1421/60
1453/100
Others
--
1389/6
1489/12
Input Current (full load / no-load)
48VDC nominal input series,
nominal input voltage
3.3VDC output
--
727/20
745/30
mA
5VDC output
--
711/20
727/35
Others
--
711/5
727/10
Reflected Ripple Current
Nominal input voltage
--
40
--
Surge Voltage (1sec. max.)
24VDC nominal input series
-0.7
--
50
VDC
48VDC nominal input series
-0.7
--
100
Start-up Voltage
24VDC nominal input series
--
--
18
48VDC nominal input series
--
--
36
Start-up Time
Nominal input voltage & constant resistance load
--
10
--
ms
DC/DC Converter
VRB_LD-30WR3 Series
2018.12.05-A/3 Page 2 of 5
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Input Filter
Pi filter
Hot Plug
Unavailable
Ctrl *
Module on
Ctrl pin open or pulled high (3.5-12VDC)
Module off
Ctrl pin pulled low to GND (0-1.2VDC)
Input current when off
--
5
8
mA
Note: *The Ctrl pin voltage is referenced to input GND.
Output Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Voltage Accuracy
5%-100% load
--
±1
±3
%
0%-5% load
--
±1
±5
Linear Regulation
Input voltage variation from low to high at full load
--
±0.2
±0.5
Load Regulation①
5%-100% load
--
±0.5
±1
Transient Recovery Time
25% load step change,
nominal input voltage
--
300
500
µs
Transient Response Deviation
3.3V/5VDC output
--
±5
±8
%
Others
--
±3
±5
Temperature Coefficient
Full load
--
--
±0.03
%/℃
Ripple & Noise②
20MHz bandwidth, nominal input voltage, 100% load
--
50
100
Mv p-p
Trim
--
±10
--
%Vo
Over-voltage Protection
Input voltage range
110
--
160
Over-current Protection
110
--
190
%Io
Short-circuit Protection
Hiccup, continuous, self-recovery
Note: ①Load regulation for 0%-100% load is ±5%;
②The “parallel cable” method is used for Ripple and Noise test, please refer to DC-DC Converter Application Notes for specific information.
General Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
Isolation
Input-output Electric Strength test for 1 minute with a
leakage current of 1mA max.
1500
--
--
VDC
Insulation Resistance
Input-output resistance at 500VDC/60sec.
1000
--
--
MΩ
Isolation Capacitance
Input-output capacitance at 100KHz/0.1V
--
2000
--
pF
Operating Temperature
See Fig. 1 and Fig. 2
-40
--
+80
℃
Storage Temperature
-55
--
+125
Storage Humidity
Non-condensing
5
--
95
%RH
Pin Soldering Resistance
Temperature
Soldering spot is 1.5mm away from case for 10
seconds
--
--
+300
℃
Vibration
10-55Hz, 2G, 30 Min. along X, Y and Z
Switching Frequency *
PWM mode
--
300
--
KHz
MTBF
MIL-HDBK-217F@25℃
1000
--
--
K hours
Note: *Switching frequency is measured at full load. The module reduces the switching frequency for light load (below 50%) efficiency improvement.
Mechanical Specifications
Case Material
Aluminum alloy
Dimensions
50.80 × 25.40 × 11.80 mm
Weight
27.8g(Typ.)
Cooling Method
Free air convection
DC/DC Converter
VRB_LD-30WR3 Series
2018.12.05-A/3 Page 3 of 5
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Electromagnetic Compatibility (EMC)
Emissions
CE
CISPR32/EN55032 CLASS A (without extra components)/ CLASS B (see Fig.4-②for
recommended circuit)
RE
CISPR32/EN55032 CLASS A (without extra components)/ CLASS B (see Fig.4-②for
recommended circuit)
Immunity
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.4-①for recommended circuit)
perf. Criteria B
Surge
IEC/EN61000-4-5 line to line ±2KV (see Fig.4-①for recommended
circuit)
perf. Criteria B
CS
IEC/EN61000-4-6 3 Vr.m.s
perf. Criteria A
Typical Characteristic Curves
Fig. 1
Apply model：VRB2403LD-30WR3、VRB2405LD-30WR3、
VRB4803LD-30WR3、VRB4805LD-30WR3
Fig. 2
Apply model: VRB2409LD-30WR3、VRB2412LD-30WR3、
VRB2415LD-30WR3、VRB2424LD-30WR3、
VRB4812LD-30WR3、VRB4815LD-30WR3、
VRB4824LD-30WR3
Design Reference
1. Typical application
All the DC/DC converters of this series are tested before delivery using the recommended circuit shown in Fig. 3.
Input and/or output ripple can be further reduced by appropriately increasing the input & output capacitor values Cin and Cout and/or by
selecting capacitors with a low ESR (equivalent series resistance). Also make sure that the capacitance is not exceeding the specified max.
capacitive load value of the product.
DC/DC Converter
VRB_LD-30WR3 Series
2018.12.05-A/3 Page 4 of 5
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC DC
Vin
GND
+Vo
0V
Cin
Cout
Fig. 3
output voltage
(VDC)
Cout
(µF)
Cin
(µF)
3.3/5/9
220
100
12/15/24
100
2. EMC compliance circuit
Fig. 4
Notes: For EMC tests we use Part ①in Fig. 4 for immunity and part ②for
emissions test.
Parameter description
Model
Vin:24V
Vin:48V
FUSE
Choose according to actual input
current
MOV
S20K30
S14K60
C0
680µF/50V
330µF/100V
C1
330µF/50V
330µF/100V
C2
4.7µF/50V
2.2µF/100V
C3
Refer to the Cout in Fig.3
LCM
1mH, recommended to use
MORNSUN P/N: FL2D-30-102s
CY1、CY2
1nF/2KV
3. Trim Function for Output Voltage Adjustment (open if unused)
0V
R2
R1
R3
Vref
RT
Trim
Vo’
0V
R2
R1
R3
Vref
RT
Trim
Vo’
Trim up Trim down
TRIM resistor connection (dashed line shows internal resistor network)
Calculating Trim resistor values:
up: a= Vref
Vo’-Vref R1
R =TaR2
R -a2-R3
down: a= Vref
Vo’-Vref R2
R =TaR1
R -a1-R3
RT=Trim resistance;
a=self-defined parameter;
Vo’= desired output voltage.
Vout(VDC)
R1(KΩ)
R2(KΩ)
R3(KΩ)
Vref(V)
3.3
4.801
2.87
12.4
1.24
5
2.883
2.87
10
2.5
9
7.500
2.87
15
2.5
12
11.000
2.87
15
2.5
15
14.494
2.87
15
2.5
24
24.872
2.87
17.8
2.5
4. The products do not support parallel connection of their output
5. For additional information please refer to DC-DC converter application notes on
www.mornsun-power.com
DC/DC Converter
VRB_LD-30WR3 Series
2018.12.05-A/3 Page 5 of 5
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
Horizontal Package Dimensions and Recommended Layout
Note:
Unit :mm[inch]
Pin diameter tolerances :±0.10[±0.004]
General tolerances:±0.50[±0.020]
Note：Grid 2.54*2.54mm
1102000905-B0
Function
Pin
1
2
3
4
5
Pin-Out
6
50.80 [2.000]
25.40 [1.000] 4.10 [0.161]
20.32 [0.800]
∅1.00 [0.039]
45.72 [1.800]
Front View
Bottom View
6
5
4
GND
Vin
Ctrl
Trim
0V
+Vo
5.08 [0.200]10.16 [0.400]
2
1
3
2.54 [.100]
2
1
3
6
5
4
∅1.50 [∅0.059]
THIRD ANGLE PROJECTION
11.80 [0.465]
Notes:
1. For additional information on Product Packaging please refer to www.mornsun-power.com.Horizontal Packaging Bag Number:
58200035;
2. The maximum capacitive load offered were tested at input voltage range and full load;
3. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75%RH with nominal
input voltage and rated output load;
4. All index testing methods in this datasheet are based on company corporate standards;
5. We can provide product customization service, please contact our technicians directly for specific information;
6. Products are related to laws and regulations: see "Features" and "EMC";
7. Our products shall be classified according to ISO14001 and related environmental laws and regulations, and shall be handled by
qualified units.
Mornsun Guangzhou Science & Technology Co., Ltd.
Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Huangpu District, Guangzhou, P. R. China
Tel: 86-20-38601850 Fax: 86-20-38601272 E-mail:info@mornsun.cn www.mornsun-power.com