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LC709203FXE-01MH датащи(PDF) 11 Page - ON Semiconductor |
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LC709203FXE-01MH датащи(HTML) 11 Page - ON Semiconductor |
11 / 23 page LC709203F www.onsemi.com 11 Before RSOC (0x04) This LSI obtains Open Circuit Voltage (OCV) reading 10 ms after Power-on reset to initialize RSOC (See figure 7). Or the LSI can be forced to initialize RSOC by sending the Before RSOC Command (0 04 = AA55) or the Initial RSOC Command (0 07 = AA55). The accuracy of the Initialization requires the OCV reading to be taken with minimal load or charge, under 0.025C, on the battery. (i.e. less than 75mA for 3000mAh design capacity battery.). The LSI initializes RSOC by the maximum voltage between initialize after Power-on reset and setting the command when the Before RSOC command is written. (See figure 8). Thermistor B (0x06) Sets B-constant of the thermistor to be measured. Refer to the specification sheet of the thermistor for the set value to use. Initial RSOC (0x07) The LSI can be forced to initialize RSOC by sending the Before RSOC Command (0 04 = AA55) or the Initial RSOC Command (0 07 = AA55). Figure 7. RSOC automatic initialization Figure 8. Before RSOC command The LSI initializes RSOC by the measured voltage at that time when the Initial RSOC command is written. (See figure 9). The maximum time to initialize RSOC after the command is written is 1.5 ms. Cell Temperature (0x08) This register contains the cell temperature from 20C (009E4) to +60 C (00D04) measured in 0.1C units. In the Thermistor mode (0 16 = 01) the LSI measures the attached thermistor and loads the temperature into the Cell Temperature register. In the Thermistor mode, the thermistor shall be connected to the LSI as shown in figure 2. The temperature is measured by having TSW pin to provide power into the thermistor and TSENSE pin to sense the output voltage from the thermistor. Temperature measurement timing is controlled by the LSI, and the power to the thermistor is not supplied for other reasons except to measure the temperature. In the I2C mode (0 16 = 00) the temperature is provided by the host processor. During discharge/charge the register should be updates when the temperature changes more than 1 C Cell Voltage (0x09) This register contains the voltage on VDD 1mV units. Current Direction (0x0A) This register is used to control the reporting of RSOC. In Auto mode the RSOC is reported as it increases or decreases. In Charge mode the RSOC is not permitted to decrease. In Discharge mode the RSOC is not permitted to increase. With consideration of capacity influence by temperature, we recommend operating in Auto because RSOC is affected by the cell temperature. A warm cell has more capacity than a cold cell. Be sure not to charge in the Discharge mode and discharge in the Charge mode; it will create an error. An example of RSOC reporting is shown in Figures 10 and 11. Figure 9. Initial RSOC command |
Аналогичный номер детали - LC709203FXE-01MH |
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Аналогичное описание - LC709203FXE-01MH |
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