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Part Number: TPS61099
Dear TI engineer,
I'm testing the board uses TPS610993 to boost from alkaline battery voltage to 3.0V.
I found an unexpected high voltage in load variation test. I think TPS610993 is fixed output (3.0V).
What is happening in my board?
I tested same test with TPS61099EVA-023. No high voltage. 3.6V fixed type is mounted in TPS61099EVA-023 .
Best RegardsJasper LiBoost Converter Solution
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In reply to Jasper Li:
Thank you for you quick response.
>1. is this behavior found in several boards？
I tested 2 boards. I found this behavior in both.
>2. could you make sure if you are using TPS610993, not TPS61099?
In reply to user5327650:
Result with resister 62 ohm and mechanical sw.
Output voltage in SW on : 1.7V
Off: 3.0 V , 5.5V
I tried on TPS61099EVM-023 Board. I could not reproduce the same behavior.
Followings are difference between my design and the EVM board.
My board TPS610993YFF (3.0V WCSP Package)
EVM TPS610995 (3.6V WSON Package)
In order to increase the input current, I chose to lower the impedance of the wiring.
shorten and thick
It seemed that the probability of high voltage occurrence declined.
In my environment, its behavior in Vin = 0.7V. In the case Vin =0.9V, I can not find same behavior.
In my case, the load switching is done by manual. It should be done by test equipment like pulse generator.
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