Part Number: BQ2000
Hi Team,
The datasheet shows the following about PVD and I would like to ask about the following yellow part.
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(datasheet page.9)
Peak Voltage (NiCd, NiMH)
The bq2000 uses a peak-voltage detection (PVD) scheme to terminate fast charge for NiCd and NiMH batteries.
The bq2000 continuously monitors the voltage on the BAT pin, representing the battery voltage, to ensure that it
never exceeds VMCV (maximum cell voltage). In addition, it also samples, at a rate of MTO/128, the voltage on
the BAT pin and triggers the peak detection feature if this value falls below the maximum sampled value by as
much as 3.8mV (PVD). In preparation for sampling the BAT pin voltage, the bq2000 briefly turns off most circuits
(the MOD and RC pins will both go low) in order to get the cleanest possible, noise-free measurement. While the
monitoring of the BAT pin voltage is continuous, the sampling of the BAT pin voltage with the internal ADC only
occurs during the constant current regulation phase of fast charge.
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I understood charging is disabled when sampling the BAT pin voltage.
Could you tell me how much duration that charging is disabled?
I would also like to know interval that internal ADC samples the voltage.
Best Regards,
Yaita / Japan disty
