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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 | Product series | C | VR (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | DF (%) | Pitch (mm) | Ø D (mm) | L (mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 860010678024 | SPEC | 7 files | WCAP-ATG8 Aluminum Electrolytic Capacitors | 1000 µF | 50 | 2000 | -40 °C up to +85 °C | 1485 | 500 | 10 | 5 | 13 | 25 | Ammopack | ||
| 750319952 | SPEC | – | – | Offline Transformer | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 860010678024 | SPEC | |
| 750319952 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | C | VR (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | DF (%) | Pitch (mm) | Ø D (mm) | L (mm) | Packaging | Samples |
|---|