- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373749 > TWL2214CA High voltage fast-switching NPN power transistor PDF資料下載
參數(shù)資料
| 型號： | TWL2214CA |
| 英文描述： | High voltage fast-switching NPN power transistor |
| 中文描述： | 電源管理IC和鋰離子電池充電控制 |
| 文件頁數(shù)： | 30/36頁 |
| 文件大?。?/td> | 511K |
| 代理商： | TWL2214CA |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁當前第30頁第31頁第32頁第33頁第34頁第35頁第36頁
SLVS321A
–
OCTOBER 2001
–
REVISED JANUARY 2002
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
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 a wake-up capability for the battery pack with a pack-protector device.
At the start of the charge cycle, the TWL2214CA 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.
_
+
R1
R2
BG
Wake-Up
Enable
No Battery
Battery
TWL2214CA
Control
Logic
_
+
+
–
1 mA
BG = 1.2 V
R1 + R2
R2
BG
×
= 4.3 V
VDD1
VBAT
VCHG
Figure 18. Battery Pack Wake Up
precharge
The TWL2214CA 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.
V
PRE
I
PRE
Where:
R
PR
45,V
PRE
1.2V
10%
R
PR
= External resistor
I
PRE
= Desired precharge current
V
PRE
= Voltage at RPRE terminal
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TX-1033S | TX-1033S |
| TX-S | SMALL POLARIZED RELAY WITH HIGH SENSITIVITY 50mW |
| TXC-20049-DCMM | N-channel 25V - 0.0068O - 60A - DPAK - IPAK STripFET™ III Power MOSFET |
| TXC-20153-DCMM | N-channel 30V - 0.0059 Ohm - 70A - DPAK / IPAK STripFET III Power MOSFET |
| TXC06303AIBG | N-CHANNEL 24V - 0.010 Ohm - 40A DPAK/IPAK ULTRA LOW GATE CHARGE STRIPFET POWER MOSFET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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: |
| TWL3014CGGMR | 制造商:Fairchild Semiconductor Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。