This is a high efficiency, high power density hybrid step-down converter, using lmt4660, with soft switched switched capacitor topology and traditional step-down converter, which can provide higher efficiency than traditional switching architecture. It provides a high efficiency, high density and cost-effective solution for non-isolated intermediate bus applications in power distribution, data communication and telecommunications.
The document provides a user guide for Demonstration Circuit 2959A-B, which utilizes three LTM4660 regulators to deliver 12V at up to 75A. The circuit employs a PolyPhase design that merges soft-switching switched capacitor topology with a traditional step-down converter to achieve high efficiency and low output ripple.
| Input Voltage Range | 36V to 60V (up to 65V during transients) |
|---|---|
| Output Voltage | 12V |
| Maximum Output Current | 75A |
| Typical Efficiency | 96.8% |
| Peak Efficiency | 97.2% |
| Default Switching Frequency | 350 kHz |
Do not use a long ground lead on the oscilloscope probe; instead, solder short, stiff leads to the capacitor terminals and touch the probe's ground ring to the (–) lead.
The device stops switching and pulls the FAULT pin low.