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參數(shù)資料
| 型號： | TPS65800RTQTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56 |
| 封裝： | 8 X 8 MM, GREEN, PLASTIC, QFN-56 |
| 文件頁數(shù)： | 39/98頁 |
| 文件大?。?/td> | 2077K |
| 代理商： | TPS65800RTQTG4 |
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POWER PATH MANAGEMENT FUNCTION
Detecting the System Status
SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007
The power path has three integrated power MOSFETs: the battery to system MOSFET (battery switch), the AC
input to system MOSFET (AC switch) and the USB input to system MOSFET (USB switch). Each of those power
MOSFETs can be operated either as an ON/OFF switch or as a linear pass element under distinct operating
conditions, as defined by the control circuits that set the power MOSFET gate voltage.
The TPS65800 regulates the voltage at the OUT pin to 4.6 V when one of the external supplies connected to
pins AC or USB is powering the OUT pin. The selected input (AC or USB pin) current is limited to a value
defined by I2C register settings. The input current limit function assures compatibility with USB standard
requirements, and also implements a protection function by limiting the maximum current supplied by an external
AC_DC adapter or USB port power terminal.
The AC power MOSFET and USB power MOSFET operating modes are set by integrated control loops. Each of
the power MOSFETs is controlled by two loops: one system voltage regulation loop and one input current
limiting loop. The integrated loops modulate the AC or USB power MOSFETs drain to source resistance to
regulate either the OUT pin voltage or to limit the input current. If no input power is present (AC and USB input
power not detected) the AC and USB power MOSFETs are turned OFF, and the battery MOSFET is turned ON,
connecting the BAT pin to the OUT pin.
The battery switch is turned ON when the AC or USB input power is detected and the charger function is
enabled, charging the battery pack. During charge the battery MOSFET switch operation mode is defined by the
charger control loops. The battery MOSFET switch drain-to-source resistance is modulated by the charge
current loop and charge voltage loop in order to implement the battery charging algorithm. In addition ot that
multiple safety functions are activated (thermal shutdown, safety timers, short circuit recovery), and additional
functions (thermal loop and DPPM loop) optimize the charging process.
The power path and charge management block operate independently of the other TPS65800 circuits. Internal
circuits check battery parameters (pack temperature, battery voltage, charge current) and system parameters
(AC and USB voltage, battery voltage detection), setting the power path MOSFETs operating modes
automatically. The TPS65800 has integrated comparators that monitor the battery voltage, AC pin voltage, USB
pin voltage and the OUT pin voltage. The data generated by those comparators is used by the power path
control logic to define which of the integrated power path switches is active. A simplified block diagram for the
system status detection is shown below.
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| TPS65810EVM | 功能描述:電源管理IC開發(fā)工具 TPS65810 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65810RTQR | 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65810RTQRG4 | 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65810RTQT | 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65810RTQTG4 | 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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