參數(shù)資料
型號(hào)： TPS65820RSHT
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝： 7 X 7 MM, GREEN, PLASTIC, QFN-56
文件頁(yè)數(shù)： 42/98頁(yè)
文件大小： 2290K
代理商： TPS65820RSHT
Using the Input Power to Run the System and Charge the Battery Pack
BATTERY CHARGE MANAGEMENT FUNCTION
Operating Modes
www.ti.com .............................................................................................................................................................. SLVS663B – MAY 2006 – REVISED APRIL 2008
An internal comparator with a fixed deglitch time, t DGL(NOBAT) monitors the ANLG1 pin voltage, if V(ANLG1) >
V(OUT) – VNOBATID a battery removed condition is detected and an internal discharge switch is activated,
connecting an internal resistor from BAT pin to AGND1. Note that ANLG1 can also be used as an analog input
for the ADC converter, in this case the voltage at pin ANLG1 must never exceed the V(OUT) - VNOBATID threshold
to avoid undesired battery discharge.
The external supply connected to AC or USB pins must be capable of supplying the system power and the
charger current. If the external supply power is not sufficient to run the system and charge the battery pack the
TPS65820 executes a two-stage algorithm that prevents a low voltage condition at the system power bus:
1. The charge current is reduced, until the total (charger + system current) is at a level that can be supplied by
the external input supply. This function is implemented by a dedicated charger control loop (see DPPM
section in charger functional description for additional details).
2. The battery switch is turned ON if the charge current is reduced to zero and the input current is not enough
to run the system. In this mode of operation both the battery and the external input power supply the system
power ( supplement operation mode).
The supplement operation mode is automatically set by the TPS65820 when the input power is switched to the
OUT pin, and the OUT pin voltage falls below the battery voltage.
The TPS65820 supports charging of single-cell Li-Ion or Li-Pol battery packs. The charge process is executed in
three phases: precharge (or preconditioning), constant current and constant voltage.
The charge parameters are selectable via I2C interface and using external components. The charge process
starts when external input power is connected to the system, the charger is enabled by the I2C register
CHG_CONFIG bits CE=HI and CHGON=HI, and the battery voltage is below the recharge threshold, V(BAT) <
V(RCH). When the charge cycle starts a safety timer is activated. The safety timer timeout value is set by an
external resistor connected to TMR pin.
When the charger is enabled two control loops modulate the battery switch drain to source impedance to limit the
BAT pin current to the programmed charge current value (charge current loop) or to regulate the BAT pin voltage
to the programmed charge voltage value (charge voltage loop). If V(BAT) < 3 V (typ) the BAT pin current is
internally set to 10% of the programmed charge current value. A typical charge profile is shown below, for an
operation condition that does not cause the IC junction temperature to exceed 125
°C (typ).
Copyright 2006–2008, Texas Instruments Incorporated
47
Product Folder Link(s): TPS65820
相關(guān)PDF資料
PDF描述
TPS65820RSH 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
TRU050-GACHA-47M4570000 PHASE LOCKED LOOP, CDSO16
TRU050-GACNA-12M6240000 PHASE LOCKED LOOP, CDSO16
TRU050-GALNA-20M0000000 PHASE LOCKED LOOP, CDSO16
TRU050-GALNB-51M8400000 PHASE LOCKED LOOP, CDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65820RSHTG4 功能描述:電池管理 Int Sgl-Cell Li-Ion Batt & Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 電池類(lèi)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
TPS658310YFFR 功能描述:PMIC 解決方案 PMU w/Switching Chgr & Lighting Cntrl RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65835EVM-705 功能描述:電源管理IC開(kāi)發(fā)工具 TPS65835 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS65835RKPR 功能描述:PMIC 解決方案 Adv PMU w/Integrated MSP430 RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65835RKPT 功能描述:PMIC 解決方案 ADVANCED PMU RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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