參數(shù)資料
型號: TPS65072TRSLRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: POWER SUPPLY SUPPORT CKT, PQCC48
封裝: 6 X 6 MM, 0.4 MM PITCH, PLASTIC, QFN-48
文件頁數(shù): 21/90頁
文件大小: 1375K
代理商: TPS65072TRSLRQ1
VO(REG)
IO(CHG)
V(LOWV)
PRECHARGE
CCFAST
CHARGE
CVTAPER
DONE
Battery
Voltage
Battery
Current
TERMCURRENT=1
THERMAL
REGULATION
TJ(REG)
ICjunction
temperature,TJ
I(TERM)
I(PRECHG)
SLVSAP7 – JANUARY 2011
www.ti.com
Figure 28. Thermal Loop
Timer Fault:
The following events generate a fault status:
1. If the battery voltage does not exceed VLOWV in time tPRECHG during pre-charging
2. If the battery current does not reach ITERM in time tMAXCH in fast charge (measured from beginning of fast
charge).
The fault status is indicated by Bits CHG TIMEOUT or PRECHG TIMEOUT in register CHGCONFIG0 set to 1.
BATTERY PACK TEMPERATURE MONITORING
The device has a TS pin that connects to the NTC resistor in the battery pack. During charging, if the resistance
of the NTC indicates that the battery is operating outside the limits of safe operation, charging is turned off. All
timers maintain their values. When the battery pack temperature returns to a safe value, charging is resumed,
and the timers are also turned back on.
Battery pack temperature sensing is disabled when termination is disabled and the voltage on the TS pin is
higher than VDIS(TS) (caused by absence of pack and thus absence of NTC).
The default for the NTC is defined in register CHGCONFIG1 with Bit SENSOR TYPE as a 10k curve 2 NTC. The
sensor can be changed to a 100k curve 1 NTC by setting the Bit to 0.
There needs to be a resistor in parallel to the NTC for linearization of the temperature curve. The value for the
resistor is given in the table below:
28
Copyright 2011, Texas Instruments Incorporated
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