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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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L6924UTR Scheda tecnica(PDF) 21 Page - STMicroelectronics |
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L6924UTR Scheda tecnica(HTML) 21 Page - STMicroelectronics |
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21 / 37 page  L6924U Applications information: charging process Doc ID 14716 Rev 2 21/37 7.5 Recharge flow chart Figure 14. Recharge flow chart 7.6 Recharge threshold When, from an end-of-charge condition, the battery voltage goes below the recharging threshold (VRCH), the device goes back in charging state. The value of the recharge threshold is 4.05 V. 7.7 Maximum charging time To avoid the charging of a dead battery for a long time, the L6924U has the possibility to set a maximum charging time starting from the beginning of the fast-charge phase. This timer can be set through a capacitor, connected between the TPRG pin and GND. CTPRG is the external capacitor (in nF) and is given by the following equation: Equation 10 Note: The maximum recommended CTPRG value must be less than 50 nF. 9 10 × ⎟ ⎟ ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎜ ⎜ ⎝ ⎛ × = REF PRG BG T MAXCH TPRG V R V K T C E |
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