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參數(shù)資料
| 型號： | TWL2213CAPFBR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48 |
| 封裝： | PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 18/33頁 |
| 文件大?。?/td> | 498K |
| 代理商： | TWL2213CAPFBR |
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TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
battery pack wake up
Li-Ion cells can be easily damaged by overcharging or overdischarging. To prevent damage, a pack-protector
device is used within the battery pack. During the charging cycle, if the pack-protector senses an over-voltage
condition, it disconnects the pack from the charger to prevent further charging but allows discharging. During
the discharging cycle, if the protector senses an under-voltage condition, it disconnects the cell from the load
to prevent further discharging.
This phase of the charging cycle provides wake-up capability for the battery pack with a pack-protector device.
At the start of the charge cycle, the TWL2213 device provides a wake-up signal of 1 mA and 4.3 V to the battery
pack. At the end of the 8-second time limit, if the battery pack voltage remains at 4.3 V, a no-battery flag is set
in the status register to signal the condition that the charging path is open. If the battery voltage is below 2.5 V,
a BATTERR flag is set in the status register to signal a bad battery cell. In either case, the charging activity is
halted.
_
+
VCHG
R1
R2
BG
Wake-Up
Enable
V DD1
No Battery
Battery
TWL2213
VBAT
Control
Logic
_
+
–
1 mA
BG = 1.2 V
R1 + R2
R2
BG
×
= 4.3 V
Figure 14. Battery Pack Wake Up
precharge
The TWL2213 device starts the precharge phase when the battery voltage is less than 3.2 V. The precharge
time is limited by the PTR timer. The precharge current level is set by an external resistor. The maximum
precharge current the charger can supply is 100 mA. Use the following equation to choose the external resistor
value.
Rpr
+
V
PRE
Ipre
45, V
PRE + 1.2V " 10%
Where:
Rpr = External resistor (ohm)
Ipre = Desired precharge current (Amp)
VPRE = Voltage at RPRE Pin (Volts)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TWL2214CA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Management IC and Li-Ion Battery Charge Control |
| TWL2214CAPFB | 制造商:Rochester Electronics LLC 功能描述:POWER SUPPLY MANAGEMENT IC:LION - Bulk 制造商:Texas Instruments 功能描述:CHGR LI-ION/LI-POL 150MA 2.8V 48TQFP - Tape and Reel |
| TWL2214CAPFBR | 制造商:Rochester Electronics LLC 功能描述:POWER SUPPLY MANAGEMENT IC:LION - Bulk 制造商:Texas Instruments 功能描述:CHGR LI-ION/LI-POL 150MA 2.8V 48TQFP - Tape and Reel |
| TWL2217CGGMR | 制造商:Texas Instruments 功能描述: |
| TWL2217CZQER | 制造商:Texas Instruments 功能描述: |
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