last highlighted date: 2022-08-12
Highlights
- load dump, cold crank, battery reverse polarity, double battery jump, spikes, and other transients defined in LV 124, ISO 7637-2, ISO 17650-2, and TL82066, as well as mechanical vibration, noise, extremely wide temperature ranges, etc.
- In automotive electronics, load dump refers to the disconnection of the vehicle battery from the alternator while the battery is being charged.
- Furthermore, if a start event happens on a cold morning, the starter draws more current than at higher ambient temperatures, pulling the battery down to 3.2 V or lower for around 20 ms—this is called cold crank
- In addition, the LT8672 effectively reduces conduction losses when compared with a traditional Schottky diode solution under the same load conditions. As seen in the thermal images of Figure 7, the solution using the LT8672 is almost 60°C cooler than a traditional diode-based solution. It not only improves the efficiency, but also eliminates the need for a bulky heat sink.
- Ripple is a noise component that appears at the output and input capacitors. Ripple can be reduced with the low ESR and ESL capacitors, and low-pass LC filters.