• LT8490 / LT8491 multiphase questions

    Hi,

    In looking through some other answers for LT8490/LT8491 it seems that the recommended way to create a multiphase converter is to use one LT8491 and (N-1)x LT8705A parts. I have a few questions regarding this:

    1. Is it possible to only use one error…

  • RE: How to connect multiple LT8491 in parallel?

    If I have one master LT8491 and 3 slave LT8705A's, do I need input current sense resistors on all the slaves?  I'm looking at DC2285A and the slave LT8705A doesn't have an input sense resistor.  Why are CSNIN and CSPIN tied together?  Thanks…

  • RE: LT8491 higher current / voltage

    Yes, see DC2285A demoboard. You can search directly or search on LT8705A. This demoboard has two LT8705A in parallel with the option to add an LT8491 for charging batteries.

  • RE: LT8490 Efficiency and Parallel Connections

    1) Attached plot shows efficiency in blue and power loss in red. Plot shows greater than 95% is easily achievable. Measurements were taken on DC2069A demoboard at room temp.

    2) Yes, you can use the LT8490 to supply a DC bus. More current delivery can be…

  • RE: LT8705 Back up mode

    Hi XJ711,

    The limitation is power dissipation in the MOSFETs. A similar application to this can be found on page 41 of the LT8705A datasheet. Depending on PCB construction and environmental conditions one LT8705A can meet these requirements.

    Note: If…

  • RE: LTPowerCAD crash when opening file

    I have a similar problem: when trying to open the LT8705A design, LTpowerCAD crashes

  • RE: LT8490 with solar panel

    The maximum Rsense value based on the datasheet calculations should be used. Find the maximum Rsense value based on the current requirements and choose a standard value slightly lower than the maximum. Choosing an Rsense value lower than needed will only…

  • RE: 请推荐DC-DC芯片,要求输入100V以内,输出24V15A以上,非隔离芯片

    24Vout@10A的方案都得需要外置的MOSFET,所以可以参考LTC3895/LTC7801/LTC3810/LTC3703。如果输入电压有可能低于24V的话,可以看一下LTC3779,LT8705A。

  • RE: LT8490 Vin below 6V

    LT8490 can not operate below 6V input.

    You could consider LT8705A if you are ready to add your own microcontroller to handle charge control. It has the same power stage. You would need to add an external voltage to power VIN pin so the controller starts…

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