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參數(shù)資料
| 型號(hào)： | TPS65810RTQT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 9-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56 |
| 封裝： | 8 X 8 MM, GREEN, PLASTIC, QFN-56 |
| 文件頁數(shù)： | 46/99頁 |
| 文件大小： | 2128K |
| 代理商： | TPS65810RTQT |
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BATTERY VOLTAGE REGULATION, CHARGE VOLTAGE
TEMPERATURE QUALIFICATION
DYNAMIC POWER PATH MANAGEMENT
V
DPPM + RDPPM
K
DPPM
I
DPPM
(5)
CHARGER OFF MODE
PRE-CHARGE SAFETY TIMER
SLVS658B – MARCH 2006 – REVISED FEBRUARY 2007
Once termination is detected, a new charge cycle starts if the voltage on the BAT pin falls below the V(RCH)
threshold. A new charge start is also triggered if the charger is enabled/disabled/enabled via I2C (CHG_CONFIG
register bits CE or CHGON), or if both AC and USB input power are removed and then at least one of them is
re-inserted.
The termination is disabled when the thermal loop OR DPPM loop are active, and during supplement mode.
The voltage regulation feedback is Implemented by sensing the BAT pin voltage, which is connected to the
positive side of the battery pack. The TPS65810 monitors the battery-pack voltage between the BAT and AGND1
pins, when the battery voltage rises to the VO(REG) threshold the voltage regulation phase begins and the
charging current tapers down.
The charging voltage can be selected as 4.2 V or 4.365 V (typ). The default power-up voltage is 4.2 V. As a
safety measure the 4.365 V charge voltage is programmed only if two distinct bits are set via I2C: VCHG=HI in
the CHG_CONFIG, and CHG_VLTG=LO in the GPIO3 register.
The TPS65810 charger section does not monitor the battery temperature. This function may be implemented by
an external host, which can measure the pack temperature by monitoring the ADC channel connected to the TS
pin. An external pullup resistor should be connected to the TS pin in order to bias the pack thermistor, as the
TPS65810 has no internal current source connected to the TS pin.
Under normal operating conditions, the OUT pin voltage is regulated when the AC or USB pin is powering the
OUT pin and the battery pack is being charged. If the total (system + charge current) exceeds the available input
current, the system voltage drops below the regulation value.
The dynamic power path management function monitors the system output voltage. A condition where the
external input supply rating has been exceeded or the input current limit has been reached is detected when the
OUT pin voltage drops below an user-defined threshold, VDPPM:
where:
RDPPM = external resistor connected to DPPM pin
KDPPM = DPPM scaling factor
IDPPM = DPPM pin internal current source
To correct this situation the DPPM loop reduces the charge current, regulating the OUT pin voltage to the
user-defined VDPPM threshold. The DPPM loop effectively identifies the maximum current that can be delivered by
the selected input and dynamically adjusts the charge current to guarantee that the end equipment is always
powered. In order to minimize OUT voltage ripple during DPPM operation the VDPPM threshold should be set just
below the system regulation voltage.
If the charge current is reduced to zero by the DPPM and the input current is still lower than the OUT pin load,
the output voltage falls below the DPPM threshold, decreasing until the battery supplement mode is set [V(OUT)
= V(BAT) – VSUP(DT) ].
The TPS65810 charger circuitry enters the low-power OFF mode if both AC and USB power are not detected.
This feature prevents draining the battery during the absence of input supply.
The TPS65810 activates an internal safety timer during the battery pre-conditioning phase. The pre-charge
safety timer time-out value is set by the external resistor connected to TMR pin, RTMR, and the timeout
constants KPRE and KTMR:
TPRECHG = KPRE × RTMR × KTMR
50
Copyright 2006–2007, Texas Instruments Incorporated
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| 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 |
| TPS65811RTQR | 功能描述:電池管理 Integr S-C Li-Ion 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 |
| TPS65811RTQRG4 | 功能描述:電池管理 Integr S-C Li-Ion 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 |
| TPS65811RTQT | 功能描述:電池管理 Integr S-C Li-Ion 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 |
| TPS65811RTQTG4 | 功能描述:電池管理 Integr S-C Li-Ion 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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