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Texas Instruments TPS61291: What will happen if the battery discharge start voltage momentarily exceeds Vin(max)=3.2V?
power
switching regulator
Lower the switching frequency (fsw) as much as possible to lower the frequency of boosting.
In this case, a large ripple occurs in the output voltage waveform, and it is assumed that Vin≧Vout. Therefore, we recommend installing a large capacitor on the output side or considering a 100% MaxDuty buck-boost converter.
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