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参数资料
| 型号： | TPS65014RGZT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC48 |
| 封装： | 7 X 7 MM, GREEN, PLASTIC, VQFN-48 |
| 文件页数： | 11/57页 |
| 文件大小： | 1289K |
| 代理商： | TPS65014RGZT |
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DETAILED DESCRIPTION
BATTERY CHARGER
Charge Voltage
Charge Current
Current Regulation
Phase
Voltage Regulation and Charge
Termination Phase
Regulation Voltage
Regulation Current
Minimum Charge
Voltage
Preconditioning
and Taper Detect
Pre-
Conditioning
Phase
t(PRECHG)
t(TAPER)
t(CHG)
Autonomous Power Source Selection
Temperature Qualification
TPS65014
SLVS551 – DECEMBER 2004
The TPS65014 supports a precision Li-ion or Li-polymer charging system suitable for single cells with either coke
or graphite anodes. Charging the battery is possible even without the application processor being powered up.
The TPS65014 starts charging when an input voltage on either ac or USB input is present, which is greater than
the charger UVLO threshold. See Figure 27 for a typical charge profile.
Figure 27. Typical Charging Profile
Per default, the TPS65014 attempts to charge from the ac input. If ac input is not present, the USB is selected. If
both inputs are available, the ac input has priority. The charge current is initially limited to 100 mA when charging
from the USB input. This can be increased to 500 mA via the serial interface. The charger can be completely
disabled via the interface, and it is also possible just to disable charging from the USB port. The start of the
charging process from the USB port is delayed in order to allow the application processor time to disable USB
charging, for instance if a USB OTG port is recognized. The recommended input voltage for charging from the ac
input is 4.5 V < VAC < 6.5 V. However, the TPS65014 is capable of withstanding (but not charging from) up to 20
V. Charging is disabled if VAC is greater than typically 7 V.
The TPS65014 continuously monitors battery temperature by measuring the voltage between the TS and AGND
pins. An internal current source provides the bias for most common 10K negative-temperature coefficient
thermistors (NTC) (see Figure 28). The IC compares the voltage on the TS pin against the internal V(LTF) and
V(HTF) thresholds to determine if charging is allowed. Once a temperature outside the V(LTF) and V(HTF) thresholds
is detected, the IC immediately suspends the charge. The IC suspends charge by turning off the power FET and
holding the timer value (i.e., timers are not reset). Charge is resumed when the temperature returns to the
normal range.
The allowed temperature range for a 103AT-type thermistor is 0
°C to 45°C. However, the user may modify these
thresholds by adding two external resistors. See Figure 29.
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65014RGZT | 制造商:Texas Instruments 功能描述:POWER M 2.5~6V FOR LI ION P 48QFN 制造商:Texas Instruments 功能描述:POWER M, 2.5~6V, FOR LI ION P, 48QFN |
| TPS65014RGZTG4 | 功能描述:电池管理 Li-Ion Powered Systems RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65020ARHAR | 制造商:Texas Instruments 功能描述: |
| TPS65020ARHAT | 制造商:Texas Instruments 功能描述: |
| TPS65020EVM-110 | 功能描述:电源管理IC开发工具 TPS65020-110 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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