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BQ24160 Datasheet(PDF) 22 Page - Texas Instruments |
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BQ24160 Datasheet(HTML) 22 Page - Texas Instruments |
22 / 53 page DISABLE TEMP PACK+ PACK- + + + + TS COLD TS HOT TS WARM TS COOL TS RHI RLO V -140 mV BAT(REG) 1 x Charge/ 0.5 x Charge V DRV V DRV bq2416x RLO 0.383 RHI RW ARM = RLO RLO 0.383 RHI 0.383 ´ ´ - ´ - ´ RLO 0.564 RHI RCOOL = RLO RLO 0.564 RHI 0.564 ´ ´ - ´ - ´ 22 bq24160, bq24160A, bq24161 bq24161B, bq24163, bq24168 SLUSAO0G – NOVEMBER 2011 – REVISED DECEMBER 2015 www.ti.com Product Folder Links: bq24160 bq24160A bq24161 bq24161B bq24163 bq24168 Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated Feature Description (continued) VHOT = 0.30 × VDRV Where RHOT is the NTC resistance at the hot temperature and RCOLD is the NTC resistance at cold temperature. For the bq24160, bq24161B, bq24163, and bq24168, the WARM and COOL thresholds are not independently programmable. The COOL and WARM NTC resistances for a selected resistor divider are calculated using the following equations: (3) (4) Figure 14. TS Circuit 9.3.15 Thermal Regulation and Protection During the charging process, to prevent chip overheating, the bq2416xx monitors the junction temperature, TJ, of the die and begins to taper down the charge current once TJ reaches the thermal regulation threshold, TREG. The charge current is reduced to zero when the junction temperature increases about 10°C above TREG. Once the charge current is reduced, the system current is reduced while the battery supplements the load to supply the system. This may cause a thermal shutdown of the bq2416xx if the die temperature rises too high. At any state, if TJ exceeds TSHTDWN, the bq2416xx suspends charging and disables the buck converter. During thermal shutdown mode, the buck converter is turned off, all timers are suspended, and a single 128μs pulse is sent on the STAT and INT outputs and the STATx and FAULT_x bits of the status registers are updated in the I2C. A new charging cycle begins when TJ falls below TSHTDWN by approximately 10°C. |
Número de pieza similar - BQ24160_V01 |
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Descripción similar - BQ24160_V01 |
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