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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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BQ25708 Folha de dados(PDF) 60 Page - Texas Instruments |
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BQ25708 Folha de dados(HTML) 60 Page - Texas Instruments |
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60 / 94 page  9.6.5 MinSystemVoltage Register (I2C address = 0D/0Ch) [reset value based on CELL_BATPRESZ pin setting] To set the minimum system voltage, write a 16-bit MinSystemVoltage register command (REG0x0D/0C()) using the data format listed in Figure 9-23, Table 9-27, and Table 9-28. The charger provides minimum system voltage range from 1.024 V to 16.128 V, with 256-mV step resolution. Any write below 1.024 V or above 16.128 V is ignored. Upon POR, the MinSystemVoltage register is 3.584 V for 1 S, 6.144 V for 2 S and 9.216 V for 3 S, and 12.288 V for 4 S. Figure 9-23. MinSystemVoltage Register (I2C address = 0D/0Ch) [reset value based on CELL_BATPRESZ pin setting] 7 6 5 4 3 2 1 0 Reserved Min System Voltage, bit 5 Min System Voltage, bit 4 Min System Voltage, bit 3 Min System Voltage, bit 2 Min System Voltage, bit 1 Min System Voltage, bit 0 R/W R/W R/W R/W R/W R/W R/W 7 6 5 4 3 2 1 0 Reserved R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 9-27. MinSystemVoltage Register (I2C address = 0Dh) Field Descriptions I2C 0Dh FIELD TYPE RESET DESCRIPTION 7-6 Reserved R/W 00b Not used. 1 = invalid write. 5 Min System Voltage, bit 5 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 8192 mV of system voltage. 4 Min System Voltage, bit 4 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 4096mV of system voltage. 3 Min System Voltage, bit 3 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 2048 mV of system voltage. 2 Min System Voltage, bit 2 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 1024 mV of system voltage. 1 Min System Voltage, bit 1 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 512 mV of system voltage. 0 Min System Voltage, bit 0 R/W 0b 0 = Adds 0 mV of system voltage. 1 = Adds 256 mV of system voltage. Table 9-28. MinSystemVoltage Register (I2C address = 0Ch) Field Descriptions I2C 0Ch FIELD TYPE RESET DESCRIPTION 7-0 Reserved R/W 00000000 b Not used. Value Ignored. 9.6.5.1 System Voltage Regulation The device employs Narrow VDC architecture (NVDC) with BATFET separating system from battery. The minimum system voltage is set by REG0x0D/0C(). Even with a deeply depleted battery, the system is regulated above the minimum system voltage with BATFET. When the battery is below minimum system voltage setting, the BATFET operates in linear mode (LDO mode), and the system is regulated above the minimum system voltage setting. As the battery voltage rises above the minimum system voltage, BATFET is fully on when charging or in supplement mode and the voltage difference BQ25713, BQ25713B SLUSD83C – JUNE 2018 – REVISED MAY 2023 www.ti.com 60 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: BQ25713 BQ25713B |
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