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BQ24160 Datasheet(PDF) 22 Page - Texas Instruments

No. de pieza BQ24160
Descripción Electrónicos  bq2416xx 2.5A, Dual-Input, Single-Cell Switched-Mode Li-Ion Battery Charger with Power Path Management and I2C Interface
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

BQ24160 Datasheet(HTML) 22 Page - Texas Instruments

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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.


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