Other Parts Discussed in Thread: LM5177
Tool/software:
Hi TI experts,
I intend to use this chip to design a power converter that can be integrated with a LiPO battery as one single energy storage system solution. Please see battery specs below:
Input voltage range: 10V - 16V
Output voltage: 13.8V - 14V
Power: ~200W
Therefore:
In the forward direction, the battery supplies a system load of regulated 13.8V - 14V through the power converter.
In the reverse direction, the battery can be charged (from 20% SoC @10V to 90%SoC @16V) with a smart charger / DC power supply through the power converter.
I have several questions on the implementation:
1. The forward direction implementation is clear. However for the reverse direction, what must be done so that battery overcharging is prevented?
2. I intend to implement a 10mF output bulk capacitance to meet system load requirements. In the forward direction, soft-start reduces the in-rush current of the output capactior. However, how can the inrush current be limited in the reverse direction? This is to protect the smart charger / DC power supply.
3. I noticed in the quickstart calculator tool, the crossover frequency and phase margins are explicitly stated in the graph. It seems like the gain margin is not a priority for this chip. May I ask what is the reason for this?
4. In terms of my application, would LM51770 or LM5177 be better?
