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Texas Instruments UCC28740 | Demoboard PMP30826
Offline supercapacitor backup power supply with active cell balancing reference design
Overview
| Topology | Flyback Converter |
| Input voltage | 96-552 V |
| Output 1 | 4 V / 3 A |
| IC revision | B |
Description
This reference design provides a backup voltage during a power interruption. It manages the charging of supercapacitors directly from the mains voltage (96 VAC - 272 VAC). The UCC28740 provides constant-voltage (CV) and constant-current (CC) output regulation. The supercapacitor capacitance and voltage define the energy that is available for the backup.
Features
- Electric double-layer capacitor charger
- Protection functions: over voltage, low line, over current and short circuit
- Active cell balancing
- Complete tested design with available design files and test report
Typical applications
- Single-phase electricity meter
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(A) | ISAT(A) | RDC max.(Ω) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 6.3 V(DC), 100 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 6.3 V(DC) | Capacitance100 µF | Capacitance±20% | Rated Voltage6.3 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.001 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | |||||
 | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | Size8095 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length7.8 mm | Width7.8 mm | Height9.5 mm | – | – | Inductance220 µH | Rated Current0.9 A | Saturation Current1.3 A | DC Resistance0.6 Ω | Self Resonant Frequency3.7 MHz | MountTHT |