Natural Input Current Limit Reference Design for Super-Cap Charge Circuits
Description
This reference design uses natural-input current-limit characteristics of the flyback topology. During start-up: even though the initial output voltage of the super CAP is zero: the primary winding current is always limited by the peak-switch current limit of TPS61087. Considering the duty cycle during soft-start: the input current will be lower than the peak-switch current-limit value of TPS61087 by nature. Therefore: no extra components are needed.The primary winding and secondary winding share the same ground: so the flyback inductor does not need reinforced insulation. Basic insulation is enough. This is a compact design for the super-CAP charge-up circuit application.
Features
- 2.5-V to 6-V input voltage rangeCan effectively limit the input current below 3 AIsolates the input side and the output side when shut downLow cost and small solution size
Applications
- Solid state drive
Product Categories
- Power management
| Application Area | End Equipment |
|---|---|
| Solid state drive | https://www.ti.com/solution/solid-state-drive#referencedesigns |