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Texas Instruments UCC28711D | Demoboard TIDA-00173
400-V to 690-V AC Input, 50-W Flyback Isolated Power Supply Reference Design for Motor Drives
Overview
| Topology | Flyback Converter |
| Input voltage | 400-690 V |
| Output 1 | 24 V |
| Output 2 | 16 V |
| Output 3 | 6 V |
| IC revision | E2 |
Description
This reference design provides isolated +24V (45W), ±16 V (4.5W), and +6V (0.5W) outputs to power the control electronics in variable speed drives. The power supply can be either powered directly from 3-phase AC mains (380Vac to 690Vac) or can be powered from the DC-link voltage (400Vdc to 1200Vdc). This design uses a quasi-resonant flyback topology and is rated for 50-Watt total output power. The line and load regulation of the power supply is designed to be within 5% using primary-side regulation (eliminating costly feedback components). The power supply is designed to meet the clearance, creepage, and isolation test voltages as per IEC61800-5 requirements.
Features
- Versatile input: can be either 400V-1200V DC or 380V-690V AC
- <5% line and load regulation.
- Protection against input UV/OV, output overload, short-circuit and loss of feedback
- Low-cost solution by implementing primary-side regulation (eliminates feedback loop) and use of 1000V rated MOSFETSs
- Quasi-resonant mode controller improves EMI performance
- Designed to comply to IEC 61800-5
Typical applications
- Solar Inverters
- Servo Drives
- UPS Systems
- Industrial Inverters
- Variable Speed ac and dc Drives
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT,10%(A) | fres(MHz) | Version | ISAT(A) | Mount | VIN | VOut1(V) | IOut1(A) | VOut2(V) | IOut2(A) | VOut3(V) | IOut3(A) | Vaux(V) | fswitch(kHz) | NPRI : NSEC : NAUX | VT(V (AC)) | Size | L(mm) | W(mm) | H(mm) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 2.2 µH, 6.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Inductance2.2 µH | Rated Current6.3 A | Saturation Current @ 10%5.7 A | Self Resonant Frequency65 MHz | VersionHeat Shrinking Tube | Saturation Current4.3 A | MountTHT | – | – | – | – | – | – | – | – | – | – | – | Size5075 | Length6 mm | Width6 mm | Height8.5 mm | – | – | – | – | DC Resistance0.02 Ω | – | ||||
 | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), 1000 µH, 0.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Inductance1000 µH | Rated Current0.5 A | Saturation Current @ 10%0.55 A | Self Resonant Frequency1.8 MHz | VersionStandard | Saturation Current0.55 A | MountTHT | – | – | – | – | – | – | – | – | – | – | – | Size8095 | Length7.8 mm | Width7.8 mm | Height9.5 mm | – | – | – | – | DC Resistance2.08 Ω | – | |||||
 | WE-OLTI Offline Flyback Transformers, 2500 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLTI Offline Flyback Transformers | Inductance2500 µH | – | – | – | – | Saturation Current0.0062 A | MountTHT | Input Voltage 400 - 690 V (AC) | Output Voltage 124 V | Output Current 12 A | Output Voltage 216 V | Output Current 20.14 A | Output Voltage 316 V | Output Current 30.14 A | Auxiliary Voltage16 V | Switching Frequency 68 | Turns Ratio35.5:1:2:2:0.75:2 | Insulation Test Voltage3800 V (AC) | SizeETD29 | Length35.56 mm | Width24.38 mm | Height44.2 mm | – | – | – | – | – | – | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, 1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | Rated Current1 A | – | – | VersionSMT | – | MountSMT | – | – | – | – | – | – | – | – | – | – | – | Size1806 | Length4.5 mm | Width1.6 mm | Height1.6 mm | Impedance @ 100 MHz850 Ω | Maximum Impedance1250 Ω | Maximum Impedance50 MHz | Rated Current 21500 mA | DC Resistance0.1 Ω | TypeHigh Current |