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Part Number: TPS7A92
The output current is 3A and we want to use two TPS7A9201s in parallel due to some reasons.
TIDA-01232, ballast resister solution, seems to be able to achieve it. Is TIDA-01232 good way for this purpose?
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In reply to Toshihiro Watanabe:
Best, Eric Preiss | Validation Manager | Linear and Low Dropout Regulators | Texas Instruments
In reply to Eric.Preiss:
I think TIDA-01232 is based on slva250 application. If TOLRFB or TOLVREF is 0.01(=1%) to use, I can get 0.268ohm(near 0.3ohm) as your calculation.
As you mentioned, the Author seems to measure data and find a correlation then use smaller variation but we don't have time to do this.
One question. Denominator of equation 5 in TIDA-01232 is 2x Ioutmaxsingle - Ioutmaxtotal. Do you think it becomes 3x Ioutmaxsingle - Ioutmaxtotal when 3 device current share?
In this case, ballast resister becomes 0.1ohm and each current is 1A, Vdrop_ballast is 0.1V, which is still a bit high drop but may be acceptable.
Anyway, I will ask if the customer can separate the load by two then use one LDO per each blocks. If possible, no ballast resister and it's loss can be removed.
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