LDXX SERIES
3-5W,AC-DC CONVERTER
LD---- are high efficiency green power modules with least packaging provided by Mornsun. The features of this series are: wide input voltage, DC and AC all in one, high efficiency, high reliability, low loss, safety isolation etc. They are widely used in industrial, office, civil and medical equipments. EMC and safety standards meet international standards IEC61000 EN60950/UL60601 and IEC60950, and Multi-certificate is in processing.
PRODUCT FEATURES
1. Universal Input :85 ~ 264VAC,50/60Hz 2. AC and DC all in one (input from the same terminal)
3. Low Ripple and Noise 4. Over output voltage protection , short circuit protection and Over temperature
5. High efficiency, High power density 6. Low loss, green power 7. Multiple models available
8. industrial, medical level specifications 9. 3 years warranty
MODEL SELECTION
LD05-20B24
Output Voltage Output Style Input VoltageIsolation VoltageRated PowerPackage StyleProduct Series
PRODUCT PROGRAM
Approval
Model LD03-10B03 LD03-10B05
UL/CE60950
LD03-10B09 LD03-10B12 LD03-10B15 LD03-10B24 LD05-20B03 LD05-20B05
UL/CE60601
LD05-20B09 LD05-20B12 LD05-20B15 LD05-20B24
5.5W
50.8X25.4X15.16mm
5W 4.2W
37.0X23.0X15.0mm
3W
Package
Power 2.3W
Output (Vo1/Io1) 3.3V/700mA 5v/600mA 9V/330mA 12V/250mA 15V/200mA 24V/125mA 3.3V/1250mA 5v/1000mA 9V/550mA 12V/420mA 15V/333mA 24V/230mA
Output (Iomax/T) 900mA/60S 750mA/60S 450mA/60S 330mA/60S 250mA/60S 160mA/60S 1400mA/60S 1300mA/60S 700mA/60S 550mA/60S 450mA/60S 300mA/60S
30mV 30mV Ripple and Noise
(TYP)
Efficiency (%)(TYP)
63 72 74 76 76 78 66 72 74 76 76 78
Note:
1. Ripple and Noise were measured by the method of anear measure(The details see the anear measure);
o
2. Unless otherwise specified, all specifications above are measured at rated input voltage and rated output load, TA=25C, humidity < 75%;
3. All specifications stated in this datasheet are subject to the above listed models only. For specifications of non-standard models, please contact our technical Support team.
4. Product can not be continuously over current, or it will cause permanent damage to the device.
INTPUT SPECIFICATIONS
Input Voltage Range Input Frequency Input Current
LD03 models LD05 models
LD03 models LD05 models LD03 models LD05 models
85~264VAC, 110~370VDC 47~440Hz 110VAC 65mA, typ 110mA,typ 110VAC 10A, typ 10A,typ 0.5A/250V 1A/250V
230VAC 30mA, typ 70mA, typ 230VAC 20A, typ 20A, typ Slow blow Slow blow
Inrush Current
External input fuse(recommended)
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OUTPUT SPECIFICATIONS
Voltage set accuracy Input variation
Load variation (10% to 100%) Ripple& noise(p-p) Short circuit protection Over temperature protection Over output voltage protection
20MHz Bandwidth
LD03 models LD05 models
±2%(±3% when 3.3V output ) (typ) ±0.5% (typ) ±1% (typ) 30mV(typ)
Continuous, and auto resume 150°C(max) chip lock up
diode clamp and chip lock up
COMMON SPECIFICATIONS
Temperature ranges Hold-up time Humidity
Temperature coefficient Switching frequency Efficiency
Operating
Power derating (above 55°C): Storage:
Case temperature: (Vin=230VAC)
-25°C ~ +70°C 2% / °C
-40°C ~ +105°C +95°C max 50ms(typ) 95%(max) 0.02%/°C 100kHz(typ) 76% typ
3000VAC/1Min 4000VAC/1Min None
EN55022, level A EN55011, level A
IEC/EN 61000-4-2 level 4 8kV/15kV IEC/EN 61000-4-3
IEC/EN 61000-4-4 level 3 2kV IEC/EN 61000-4-4 level 4 4kV
IEC/EN 61000-4-5 level 3 1kV/2kV IEC/EN 61000-4-5 level 4 2kV/4kV IEC60950,EN60950,UL60950 IEC60601,EN60601 EN60950,UL60950 EN60601-1 CLASS 2 UL94V-0 PCB
>200,000h @25°C
LD03 models
I/O-isolation voltage
LD05 models Leakage current
LD03 models
EMI/RFI conducted
LD05 models
Electrostatic discharge ESD RF field susceptibility
Electrical fast transients/bursts on mainsline
LD03 models
LD05 models Surge* LD03 models
LD05 models
EMC compliance
LD03 models LD05 models LD03 models
Safety approvals
LD05 models Safety standards Safety Class Case material Install MTBF
Note: External input pressure sensitive resistor is required to LD03 models at inrush experiment, refer to typical application figure.
TEMPERATURE VS LOAD INPUT VOLTAGE VS LOAD
Load (%)10080Load (%)10080604020
60407024026485110Input voltage (Vac)
-25-100Temperature( C)5570Load (%)10080 60402070110340370Input voltage (Vdc)
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TYPICAL EFFICIENCY CURVE LD03-10BXX Efficiency858075706560555045102030405060708090100Load(%)LD03-10B05 115VACEfficiency(%)LD03-10B05 230VACEfficiency(%)LD03-10B12 115VACEfficiency(%)LD03-10B12 230VACEfficiency(%)LD03-10B24 115VACEfficiency(%)LD03-10B24 230VACEfficiency(%)LD05-20BXX Efficiency90858075706560555010203040506070Load(%)8090100LD05-20B05 115VACEfficiency(%)LD05-20B05 230VACEfficiency(%)LD05-20B12 115VACEfficiency(%)LD05-20B12 230VACEfficiency(%)LD05-20B24 115VACEfficiency(%)LD05-20B24 230VACEfficiency(%)Efficiency(%)Efficiency(%) ANEAR MEASURE
LD03-10BXXFuseC3C1325.4mm25.4mmConnect Oscillograph probeCopper sheetLD05-20BXXLFUSEConnect Oscillograph ProbeCopper sheetC2LoadLoadN TYPICAL APPLICATIONS
LD03-10B**
*FUSEL*NTCLD05-20B**
L+V0C1C2TVSRLL*FUSE*NTCL+V0C1C2RLMOV+C32226-V0++-V0NNFigure1
*FUSE*NTC
L+V0NNFigure 2
*FUSE
L+V0C1C2LC6NFC1C2TVSC7MOVC8LRLC6NFC3+2226-V0+C7+RLC8-V0NNNNFigure3 LD03 EMC Application Figure
Figure4 LD05 EMC Application Figure
EXTERNAL CAPACITORS TYPICAL VALUE(Unit: µF)
model LD03-10B03 LD03-10B05 LD03-10B09 LD03-10B12 LD03-10B15 LD03-10B24
Note：
1. Output filtering capacitors C1, C3 is electrolytic capacitors, It is recommended to use high frequency and low impedance electrolytic capacitors. For capacitance and current of capacitor please refer to manufacture’s datasheet. Voltage derating of capacitor should be 80% or above. C2 is ceramic capacitor, it is used to filter high frequency noise. TVS is a recommended component to protect post-circuits (when converter fails). 2. MOV is required to LD03 models，model: 471KD05, it is used to protect the device under surge.
3. It is recommended to connect FUSE, the parameter for LD03 models is 0.5A/250V slow blow, for LD05 models is1A/250V slow blow. External input NTC is
recommended to use 5D-14 or 10Ω/2W wire-round resistor.
4. If EMC performance is required, recommended to add “EMC filter” at the input end(see figure 3,4) C6:X capacitor, recommended parameter 0.1uF/275V; C7,C8:Y capacitor, recommended parameter 220pF/2000V;
NF: common model choke, recommended inductance is about 10mH-30mH.
5. LD03 models: Terminals 22 and 26 are internal rectification and filtering terminals. To protect the models further, it is recommended to connect an electrolytic capacitor C3 (it is recommended to be 4.7uF/400V). If operation voltage of the module is between 160~264VAC, C3 can be removed.
C1 150 150 120 120 120 68
C2 0.1 0.1 0.1 0.1 0.1 0.1
C3 4.7/400V 4.7/400V 4.7/400V 4.7/400V 4.7/400V 4.7/400V
TVS P4KE6.8A P4KE6.8A P4KE12A P4KE20A P4KE20A P4KE30A
model LD05-20B03 LD05-20B05 LD05-20B09 LD05-20B12 LD05-20B15 LD05-20B24
C1 47 47 33 33 33 10
C2 0.1 0.1 0.1 0.1 0.1 0.1
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OUTLINE DIMENSIONS & PIN CONNECTIONS
LD03-10BXX
First Angle Projection37.00(1.46)RECOMMENDED FOOTPRINTTop view,grid:2.54mm(0.1inch),))10913137diameter:1.20mm(0.047inch)..00((0Bottom view80.7.322622161471262216143.265.08(0.13)(0.20)13130)09.55.Side view10(FOOTPRINT DETAILS)06PIN1FUNCTION10.80..40(0.03)1L(3N13NCNote:14-VoUnit:mm(inch)Pin diameter:0.80 0.05mm16+VoPin tolerances: 0.25mm22+Vin(DC)General tolerances: 0.50mm26-Vin(DC)Weight: 25g NC:No connection
LD05-20BXX
First Angle Projection
)024.RECOMMENDED FOOTPRINT0()0Bottom View4)Top view,grid:2.54mm(0.1inch),0)404diameter:1.60mm(0.063inch)
.5.0.10(30((134)10.0 )2 4026..Side View00((1.00(0.16)FOOTPRINT DETAILS
PinFunctionNote:
1NUnit:mm(inch)
Pin diameter:1.00 0.10mm2LGeneral tolerances: 0.50mm3+VoWeight: 35g
4-Vo
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AC-DC Converter Application Guidelines
1. Foreword
The following guidelines should be carefully read prior to converter use. Improper use may result in the risk of electric shock, damaging the converter, or fire.
1．1 Risk of Injury
A. To avoid the risk of burns, do not touch the heat sink or the converter’s case. B. Do not touch the input terminals or open the case and touch internal components,
which cold result in electric shock or burns.
C. When the converter is in operation, keep hands and face at a distance to avoid
potential injury during improper operation.
1．2 Installation Advice
A. Please make sure the input terminals and signal terminals are properly connected in
accordance with the stated datasheet requirements.
B. To ensure safe operation and meet safety standard requirements, install a slow
blow fuse at input of the converter.
C. Installation and use of AC/DC converters should be handled by a qualified
professional.
D. AC/DC converters are used in the primary transmission stage of a design and thus,
should be installed in compliance with certain safety standards.
E. Please ensure that the input and output of the converter are incorporated into the
design out of the reach of the end user. The end product manufacturer should also ensure that the converter is protected from being shorted by any service engineer or any metal filings.
F. The application circuits and parameters shown are for reference only. All parameters
and circuits are to be verified before completing the circuit design.
G. These guidelines are subject to change without notice; please check our website for
updates.
2. General AC-DC Converter Applications
2.1 Basic Application Circuit
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In Figure 1, F1 refers to the input fuse. Proper fuse selection should be a safety agency approved, slow blow fuse. Selection of the proper fuse rating is necessary to ensure power converter and system protection (potential failure if the rating is too high) and prevent false fuse blowing (which could happen if the rating is too low). Below is the formula to calculate the proper rating:
I = 3 x Vo1 x Io1 / η / Vin(min.)
Vo1 = output voltage Io1 = output current; η = the converter’s efficiency;
Vin(min) = the minimum input voltage
Futher circuit notations: ♦ NTC is a thermistor.
♦ CY and CX are safety capacitors.
♦ C1 is a high frequency ceramic capacitor or polyester capacitor, 0.1μF/50V.
♦ C2 is output filtering high frequency aluminum electrolytic capacitor. Select a 220μF
rating if the output current is greater than 5A, or a 100μF rating if the output current is less than 5A. The insulation voltage should be derated to less than 80% of rated value.
For dual or triple output converters, the circuit of input side remains the same and the outputs should be considered independently in component selection (see Figure 3).
The application circuit shown in Figure 1 is typical application circuit, whereby all MORNSUN products will meet EMI Class B, and Class 3 lightening strike and surge testing (see component datasheets for more details). To comply with more stringent EMC testing, additional filtering should be incorporated. See Figure 2 for a suggested filtering circuit.
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For multi-output converters, the main output is typically a fully regulated output. If the end application requires critical regulation on the auxiliary output(s), a linear regulator or other regular should be added after the converter. (Note: Some MORNSUN converters have built in linear regulators; please contact our Technical Department for details).
3. AC-DC Converter Safety Related Design Notes
3.1 Marking Requirements
Wherever, there are fuses, protective grounds, or switches, clear symbols should be indicated according safety standards. Touchable dangerous high voltage and energy sources should be marked with “Caution!” indications.
3.2 Input Cable Requirements:
Input cables of L, N and E should be brown, blue and yellow/green cables, respectively. Ensure that the ground cable (yellow & green cable) of Type I devices (those that rely on basic insulation and protection ground to avoid electric shock) are securely connected to the ground, and the earth resistance is lower than 0.1Ω
3.3 Clearance and Creepage For Type I devices, ensure:
♦ L and N are in front of the fuse.
♦ The clearance distance between the input and the metal case is above 2mm and
creepage is above 2.5mm.
For Type II devices (those that rely on strengthened insulation or double insulation to avoid electric shock) ensure:
♦ L and N are in front of the fuse
♦ The clearance distance between the input and the metal case is above 2mm and
creepage is above 2.5mm. ♦ The clearance between the input and the metal case or SELV is above 4mm, and
creepage of that is above 5mm.
3.4 Input energy
If the input capacitor is large, a discharge resistor may be added to ensure that, after disconnect, the voltage held between Input L, N, and the protective ground will be discharged to 37% of its maximum value or below. In Figure 2, R1 is the discharge resistor.
4. Heat Dissipation in AC/DC Converter Module Applications
Trends toward higher density in AC/DC module designs make heat dissipation an important concern. The effect of heat on the electrolytic capacitor is of particular concern, as the life of such capacitors can be drastically reduced when operated in a constant high temperature environment, leading to a higher potential for failure. Proper handling of heat will increase the life of the converter and surrounding components, thus lowering risk of failures. Some
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suggestions for handling dissipated heat are summarized, below:
(1) Ambient Air Cooling
For miniature and high power density converters, free air cooling is recommended, mainly due to cost and space concerns.
♦ Heat dissipates to the ambient air through the converter case or exposed surfaces. Heat
may also dissipate to ambient air if there is a gap between the converter and the PCB. ♦ Heat dissipates from the converter case and exposed surfaces to PCB by radiation. ♦ Heat conducts through terminals (pins) to PCB.
In such applications, please pay particular attention to:
A. Air Flow - Because the heat dissipation is mainly through convection and radiation, the
converter needs an environment with good air flow. It may be helpful to design heat dissipation venting holes throughout the end product, near the converter’s location. For best convection cooling, ensure that air flow is not blocked by large components
B. Layout of Heat Generating Components - In most applications, the AC/DC converter is
usually not the only heat generating component. It is recommended to keep a good
distance between each heat generating component to minimize heat dissipating clusters.
C. PCB Design - The PCB, which the power converter is assembled on, is not only a base to
mount the converter, but also acts as a heat sink for it, therefore heat dissipation should be considered in PCB layout. We recommend extended the area of the main copper loop and decrease the component density on the PCB to improve the ambient environment.
(2) Heat Sinks
When free air convection is not sufficient enough, we recommend the use of a heat sink for further cooling. As the converters are filled with heat conductive silicon or epoxy, the heat distribution in converter is even and it radiates from the converter to the air. The efficiency of this convection is dependent on the size of the surface area of the converter. The use of heat sinks is a practical method to add surface area and improve the convection. There are many kinds of heat sinks available in the market. MORNSUN recommends considering the following factors in selecting a heat sink:
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♦ The heat sink should be made of a good heat conducting material, such as aluminum and
copper. ♦ The larger the surface area, the better the radiation. Therefore, heat sinks usually have a
ridged surface or special coatings to make a larger surface area. ♦ Use the longest and thickest possible heat sink for best convection.
Heat sinks are best attached to the converter’s surface, where the difference in temperature between the surface and the ambient is largest. The use of heat conductive material between the heat sink and the converter’s surface to make a better contact and to improve heat conductance is suggested. To avoid case distortion, please do not affix the heat sink too firmly to the converter case.
(3) Forced Air Cooling
In some systems, where a heat sink does not effectively reduce the ambient temperature, a fan is used to improve the heat radiation. Fans can lower the surface temperature of the converter, but large fans also occupy extra space in the system. It is important to select a suitable fan size, where the speed of the fan will determines how effective it is. The faster the speed, the better the effect on reducing radiated heat. As high speed will also cause increased noise, there is a need to balance the choice between the how effective the fan is against how much audible noise it generates.
A long, rectangular shaped AC/DC converter should use a horizontal fan, and channeled heat sinks should use vertical fans, in order to encourage air flow through the channels.
5. Input Under Voltage Impact
5.1 Block Diagram of AC/DC Converter
5.2 Impact to Converter Reliability
The input voltage range of MORNSUN’s AC/DC converters is 85~264VAC or 120~370VDC. When the converter is operated within the rated input voltage range, the output current can be used up to the maximum rated specification. The total output power is Io x Vo.
If the converter is operated with an input voltage that is under the rated voltage, offering the same output power of Io x Vo , causes the current (Is) at the transistor (S) to be increased. Long term operation under this condition will damage the transistor (S).
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5.3 Input Voltage vs Load Capability (LD03-00B24)
3025Output voltage(V)201570VAC10500%10%20%30%40%50%60%70%80%90%100%110%120%130%140%65VAC60VACLoad(%)85VAC80VAC75VAC
130% 14.7 13 9.39
140% 11 10.5 7.04
Load 85VAC 80VAC 75VAC 70VAC 65VAC 60VAC
0% 23.85 23.83 23.83 23.83 23.83 23.83
10% 23.82 23.82 23.83 23.83 23.83 23.83
20% 23.79 23.82 23.83 23.83 23.83 23.83
30% 23.77 23.83 23.83 23.83 23.83 23.83
40% 23.74 23.82 23.82 23.82 23.82 23.82
50% 23.71 23.82 23.82 23.82 23.82 23.51
60% 23.68 23.81 23.82 23.81 23.82 17.86
70% 23.65 23.81 23.81 23.79 23.8 14.13
80% 23.61 23.81 23.77 19.96 19.6 10.52
90% 23.58 23.8 20.29 16.44 15.67 8.28
100% 23.57 21 16.65 13.32 12.46 0
110% 23.19 18.5 14.02 11.14 9.57
120% 19.2 15 10.98 8.79 7.65
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