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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6924U датащи(PDF) 22 Page - STMicroelectronics |
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L6924U датащи(HTML) 22 Page - STMicroelectronics |
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22 / 37 page  Applications information: charging process L6924U 22/37 Doc ID 14716 Rev 2 Figure 15. TPRG pin connection Where, RPRG = resistor which sets the current (RUSB or RAC) VREF = 1.8 V, KT = 279 x 10 5, VBG = 1.23 V, and TMAXCH is the charging time given in seconds. If the battery does not reach the end-of-charge condition before the timer expires, a fault is issued. Also during the pre-charge phase there is a safety timer, given by: Equation 11 If this timer expires and the battery voltage is still lower than VPRETH, a fault signal is generated, and the charge process finishes. Note: When the device is charged in low power USB mode, in order to take into account the reduced charge current, the maximum charging time is proportionally increased (five times the maximum charging time calculated with RUSB). MAXCH MAXPRECH T T × = 8 1 |
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