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BQ2058MSN Datasheet(PDF) 7 Page - Texas Instruments |
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BQ2058MSN Datasheet(HTML) 7 Page - Texas Instruments |
7 / 14 page 7 Event Definition: 0: The bq2058 is in the low-power sleep mode because one or more of the cell voltages are below VUV. 1: A charger is applied to the pack, causing the difference between CSH and BAT1P to become greater than 70mV. This awakens the bq2058, and the discharge pin DSG goes low. 2: One or more cells charge to a voltage equal to VOV, initiating the overvoltage delay timer. 3: The overvoltage delay time expires, causing CHG to be driven high. 4: All cell voltages fall below VCE, causing CHG to be driven low. 5: Stop charging, apply a load. 6: An overcurrent condition is detected, initiating the overcurrent delay timer. 7: The overcurrent delay time expires, causing DSG to be driven high. 8: The overcurrent condition is no longer present; DSG is driven low. 9: Pin CTL is driven high; both DSG and CHG are driven high. 10: Pin CTL is driven low; both DSG and CHG resume their normal function. 11: One or more cells fall below VUV, initiating the overdischarge delay timer. 12: Once the overdischarge delay timer expires, if any of the cells is below VUV, the bq2058 drives DSG high and enters the low-power sleep mode. bq2058 TD205801.eps Cell Voltage VOV CSH DSG CHG CTL VCE VUV 0 1 2 3 4 5 6 7 8 9 10 11 12 BAT1P + 70mV (VCD) BAT1P - 160mV (VOCH) tUVD tOCD tOVD Figure 3. Protector Event Diagram |
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