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參數(shù)資料
| 型號： | TWL2214CAPFB |
| 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)： | 25/39頁 |
| 文件大小： | 583K |
| 代理商： | TWL2214CAPFB |
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TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
LiIon BATTERY CHARGE CONTROL
SLVS321A – OCTOBER 2001 – REVISED JANUARY 2002
31
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
VG
VG2
VG3
TWL2214CA
Rsense
Active
ON
OFF
RPRE
Constant
Current
Source
Switch
Control
DC Input
ISENSE
+
–
Precharge Path
Voltage and
Current Regulation
Logic
VDD
VBAT
VCHG
RPR
Figure 19. Precharge Functional Diagram
fast charge constant current (CC mode)
When the battery voltage is 3.2 V or higher, the TWL2214CA device starts the fast charge CC mode cycle. In
CC mode, the charger regulates the charging current to its maximum level. The maximum charging current
(IMAX) is determined by the external sense resistor, RSENSE, and the voltage, VSENSE. VSENSE, is programmable
through the I2C interface (refer to CSV register for programming information). The range of VSENSE is from
100 mV to 200 mV, in 20-mV steps. The CC mode charge time is limited by the CCTR timer.
I
MAX +
V
SENSE
R
SENSE
fast charge constant current (CV mode)
When the cell reaches the constant voltage phase, the charger switches to the fast charge CV mode. The
charging current begins tapering down while the charging voltage is regulated at the programmed voltage level
(4.1 V or 4.2 V). The CV mode charging is limited by the TCTR timer.
VG
VG2
VG3
TWL2214CA
Rsense
Active
ON
ISENSE
+
–
Fast Charge Path (CC, CV)
DC Input
Voltage and
Current Regulation
Logic
Switch
Control
VDD
VCHG
VBAT
Figure 20. Fast Charge Functional Diagram
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相關代理商/技術參數(shù) |
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|---|---|
| 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: |
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| TWL3014CGGMR | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| TWL3016B2ZQW | 制造商:Texas Instruments 功能描述: |
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