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BQ24725ARGRR Datasheet(PDF) 25 Page - Texas Instruments |
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BQ24725ARGRR Datasheet(HTML) 25 Page - Texas Instruments |
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25 / 47 page  bq24725A www.ti.com SLUSAL0A – SEPTEMBER 2011 – REVISED AUGUST 2014 8.5.4 Setting the Charge Voltage To set the output charge regulation voltage, write a 16bit ChargeVoltage() command (0x15H or 0b00010101) using the data format listed in Table 5. The bq24725A provides charge voltage range from 1.024V to 19.200V, with 16mV step resolution. Sending ChargeVoltage() below 1.024V or above 19.2V clears the register and terminates charging. Upon POR, charge voltage limit is 0V. The SRN pin is used to sense the battery voltage for voltage regulation and should be connected as close to the battery as possible, and place a decoupling capacitor (0.1µF recommended) as close to the IC as possible to decouple high frequency noise. Figure 16. Charge Voltage Register (0x15H) 15 14 13 12 11 10 9 8 Not in use Charge Charge Charge Charge Charge Charge Charge Voltage, DACV Voltage, DACV Voltage, DACV Voltage, DACV Voltage, DACV Voltage, DACV Voltage, DACV 10 9 8 7 6 5 4 R/W R/W R/W R/W R/W R/W R/W 7 6 5 4 3 2 1 0 Charge Charge Charge Charge Not in use Not in use Not in use Not in use Voltage, DACV Voltage, DACV Voltage, DACV Voltage, DACV 3 2 1 0 R/W R/W R/W R/W R/W R/W R/W R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 5. Charge Voltage Register (0x15H) Bit Field Type Reset Description [15] Not in use R/W Not used. [14] Charge Voltage, DACV 10 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 16384mV of charger voltage. [13] Charge Voltage, DACV 9 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 8192mV of charger voltage. [12] Charge Voltage, DACV 8 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 4096mV of charger voltage. [11] Charge Voltage, DACV 7 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 2048mV of charger voltage. [10] Charge Voltage, DACV 6 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 1024mV of charger voltage. [9] Charge Voltage, DACV 5 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 512mV of charger voltage. [8] Charge Voltage, DACV 4 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 256mV of charger voltage. [7] Charge Voltage, DACV 3 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 128mV of charger voltage. [6] Charge Voltage, DACV 2 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 64mV of charger voltage. [5] Charge Voltage, DACV 1 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 32mV of charger voltage [4] Charge Voltage, DACV 0 R/W 0 = Adds 0mV of charger voltage. 1 = Adds 16mV of charger voltage. [3] Not in use R/W Not used. [2] Not in use R/W Not used. [1] Not in use R/W Not used. [0] Not in use R/W Not used. Copyright © 2011–2014, Texas Instruments Incorporated Submit Documentation Feedback 25 Product Folder Links: bq24725A |
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