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參數資料
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: 38/39頁
文件大小: 583K
代理商: TWL2214CAPFB
TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
LiIon BATTERY CHARGE CONTROL
SLVS321A – OCTOBER 2001 – REVISED JANUARY 2002
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
Auto power up with
adapter insertion
Adapter Attachment
VG3
VG2
VDD
PWRKIN
VREG1
PWRKOUT
CD1
XRST
PSH
CD2
0.9 VOUT
CDI Delay
VCHG
Power down by
power key insertion
CPU senses this falling
edge and drives PSH to L
Figure 3. Adapter Powered (Without Battery)
reset controller
The reset controller performs two major functions: one is to control the timing of delayed power-on reset, and
the other is to monitor the VREG1 level.
The delay reset process is started when VREG1 reaches 90% of its nominal output voltage level. The delay time
of the reset output (XRST) can be adjusted by an external timing capacitor (CD1).
During the system active state when VREG1 drops below 0.9 × Vnominal – hysteresis, XRST is driven low. If VREG1
reaches 90% of its nominal output voltage level again, the delayed reset process is started over.
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相關代理商/技術參數
參數描述
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
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