Datenblatt-Suchmaschine für elektronische Bauteile |
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BQ27743 Datenblatt(PDF) 31 Page - Texas Instruments |
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BQ27743 Datenblatt(HTML) 31 Page - Texas Instruments |
31 / 42 page 31 bq27743 www.ti.com SLUSCM0A – JUNE 2017 – REVISED SEPTEMBER 2018 Product Folder Links: bq27743 Submit Documentation Feedback Copyright © 2017–2018, Texas Instruments Incorporated Typical Applications (continued) Table 11. Key Data Flash Parameters for Configuration (continued) NAME DEFAULT UNIT RECOMMENDED SETTING Design Energy Scale 1 — Set to 10 to convert all power values to cWh or to 1 for mWh. Design Energy is divided by this value. Reserve Capacity 0 mAh Set to desired runtime remaining (in seconds/3600) × typical applied load between reporting 0% SOC and reaching Terminate Voltage, if needed. Design Voltage 3800 mV Set to nominal cell voltage per manufacturer datasheet. Cycle Count Threshold 900 mAh Set to 90% of configured Design Capacity Device Chemistry 0354 hex Should be configured using TI-supplied Battery Management Studio software. Default open-circuit voltage and resistance tables are also updated in conjunction with this step. Do not attempt to manually update reported Device Chemistry as this does not change all chemistry information! Always update chemistry using the appropriate software tool (that is, BMS). Load Mode 1 — Set to applicable load model, 0 for constant current or 1 for constant power. Load Select 1 — Set to load profile which most closely matches typical system load. Qmax Cell 0 1000 mAh Set to initial configured value for Design Capacity. The gauge will update this parameter automatically after the optimization cycle and for every regular Qmax update thereafter. V at Chg Term 4350 mV Set to nominal cell voltage for a fully charged cell. The gauge will update this parameter automatically each time full charge termination is detected. Terminate Voltage 3000 mV Set to empty point reference of battery based on system needs. Typical is between 3000 and 3200 mV. Ra Max Delta 43 mΩ Set to 15% of Cell0 R_a 4 resistance after an optimization cycle is completed. Charging Voltage 4350 mV Set based on nominal charge voltage for the battery in normal conditions (25°C, for example). Used as the reference point for offsetting by Taper Voltage for full charge termination detection. Taper Current 100 mA Set to the nominal taper current of the charger + taper current tolerance to ensure that the gauge will reliably detect charge termination. Taper Voltage 100 mV Sets the voltage window for qualifying full charge termination. Can be set tighter to avoid or wider to ensure possibility of reporting 100% SOC in outer JEITA temperature ranges that use derated charging voltage. Dsg Current Threshold 60 mA Sets threshold for gauge detecting battery discharge. Should be set lower than minimal system load expected in the application and higher than Quit Current. Chg Current Threshold 75 mA Sets the threshold for detecting battery charge. Can be set higher or lower depending on typical trickle charge current used. Also should be set higher than Quit Current. Quit Current 40 mA Sets threshold for gauge detecting battery relaxation. Can be set higher or lower depending on typical standby current and exhibited in the end system. Avg I Last Run –299 mA Current profile used in capacity simulations at onset of discharge or at all times if Load Select = 0. Should be set to nominal system load. Is automatically updated by the gauge every cycle. Avg P Last Run –1131 mW Power profile used in capacity simulations at onset of discharge or at all times if Load Select = 0. Should be set to nominal system power. Is automatically updated by the gauge every cycle. Sleep Current 15 mA Sets the threshold at which the fuel gauge enters SLEEP Mode. Take care in setting above typical standby currents else entry to SLEEP may be unintentionally blocked. Shutdown V 0 mV If auto-shutdown of fuel gauge is required prior to protect against accidental discharge to undervoltage condition, set this to desired voltage threshold for completely powering down the fuel gauge. Recovery occurs when a charger is connected. T1 Temp 0 °C Sets the boundary between charging inhibit/suspend and charging with T1-T2 parameters. Defaults set based on recommended values from JEITA standard. T2 Temp 10 °C Sets the boundary between charging with T1-T2 or T2-T3 parameters. Defaults set based on recommended values from JEITA standard. T3 Temp 45 °C Sets the boundary between charging with T2-T3 or T3-T4 parameters. Defaults set based on recommended values from JEITA standard. |
Ähnliche Teilenummer - BQ27743 |
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Ähnliche Beschreibung - BQ27743 |
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