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LM338 with kelvin sensing

toshi-e2e
Genius 4830 points
Other Parts Discussed in Thread: LM338

Our customer plans to use two units of LM338 with kelvin sensing.

According to the below application note, LM301A is used  for kelvin sensing. However this device is obsolete part.

2046.snva585.pdf

Could you please tell me the suggested op-amp for this application?

Required specification is as follows:
 Input: 12.0V - 13.5V
 Output: 9V
 Output current: 20A peak (1ms)

Also, is there any alternative solution by using linear regulators?

Thanks in advance.

Regards,
Toshi

  • 0
    TI__Mastermind 22610 points

    LM301A is not an obsolete device

    Checking the LM301 product folder shows lead-free (NOPB) versions of LM301AH (TO-99/8-pin) and LM301AN (PDIP/8-pin) as being active.

    Checking at DigiKey shows LM301A from a number of different maufacturers being available.

    There is nothing magical about LM301A. Being a thirty-year old design, almost any modern op-amp that can work with the Vin voltage, will most likely have higher gain-bandwidth, lower off-sets, and output current range better than the LM301A.

    The better solution would be using SMPS due to superior efficency at the higher current.