| Electronics > Projects, Designs, and Technical Stuff |
| PSA: do not use the TPS61099 boost reg in your designs |
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| Siwastaja:
--- Quote from: MasterTech on January 22, 2019, 10:16:19 pm ---Not saying the IC is perfect but I see some fault on your part for not assuring a stable Vin before enabling the converter. --- End quote --- Sorry to use such strong word, but: bullshit. Ramping and intermittent voltages are completely normal on any system. This is the exact task for an UVLO circuit, this is why it exists, and because the need is so common, this is why it's integrated. If they claim they have UVLO, it must accommodate exactly the ramping and bouncing Vin case, of course within maximum ratings. It's ridiculous to ask the user (only after sales, of course!) to provide an external UVLO on the enable pin when they claim to have one internally. Outputting too high of an output voltage due to input brown out cannot be justified even without an UVLO, let alone with one, unless the input bounces outside the allowed range, which probably isn't the case here. |
| OwO:
Is there a reason for using the TPS610995 in the first place? If the requirements are just <1V startup voltage and low shutdown current there are many cheap boost converter ICs that can do the job, for example the SGM6603. |
| splin:
--- Quote from: SiliconWizard on January 22, 2019, 08:32:06 pm ---Damn, that's good to know. This IC looked interesting on paper. Reading the datasheet, we can see it's got quite a few different modes of operation. Between the soft-start feature, the "down mode", "pass-through", bust mode and synchronous mode... --- End quote --- Ah, that must be the one the OP was using. |
| jeremy:
--- Quote from: OwO on January 23, 2019, 01:19:53 pm ---Is there a reason for using the TPS610995 in the first place? If the requirements are just <1V startup voltage and low shutdown current there are many cheap boost converter ICs that can do the job, for example the SGM6603. --- End quote --- Not low shutdown, low Iq and high efficiency at light load. Also relatively high current at 250mA (peak inductor pulse is up to 0.8A) |
| OwO:
--- Quote from: jeremy on January 23, 2019, 01:35:24 pm ---Not low shutdown, low Iq and high efficiency at light load. Also relatively high current at 250mA (peak inductor pulse is up to 0.8A) --- End quote --- some more parts to investigate: PT1301 ME2108 XC6367 |
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