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Texas Instruments UCC28740 | Demoboard PMP31140
Offline supercapacitor backup power supply with passive cell balancing reference design
Overview
| Topology | Flyback Converter |
| Input voltage | 195-480 V |
| IC revision | B |
Description
This reference design introduces an offline single-stage supercapacitor charger. Isolated constant-voltage constant-current flyback controller UCC28740 charges three supercapacitors in series directly from a wide input (195 VAC to 480 VAC). The supercapacitor output voltage is limited to 6.5 V.
Features
- Resonant-ring valley-switching operation
- Super capacitor voltage limit of 6.5 V
- Wide input voltage range of 195 VAC to 480 VAC
- Output over-voltage and over-current protection
- Complete tested design with available design files and test report
Typical applications
- Polyphase electricity meter
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | C | VR(V (DC)) | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Pitch(mm) | Ø D(mm) | L(mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 330 µH, 0.6 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Inductance330 µH | Rated Current0.6 A | Saturation Current @ 10%1 A | DC Resistance1.2 Ω | Self Resonant Frequency3.9 MHz | VersionHeat Shrinking Tube | – | – | – | – | – | – | – | – | Length9.5 mm | – | ||||
 | WCAP-ATG8 Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | Capacitance1000 µF | Rated Voltage50 V (DC) | Endurance 2000 | Ripple Current1485 mA | Leakage Current500 µA | Dissipation Factor10 % | Pitch5 mm | Diameter13 mm | Length25 mm | PackagingAmmopack | ||||
750319952 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |