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LP3913 bảng dữ liệu(PDF) 36 Page - Texas Instruments

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tên linh kiện LP3913
Giải thích chi tiết về linh kiện  Power Management IC for Flash Memory-Based Portable Media Players
PDF  70 Pages
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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LP3913 bảng dữ liệu(HTML) 36 Page - Texas Instruments

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External or
USB Power
Charger
State
Machine and
registers
Vbatt
+
-
+
-
Vfull
Vrestart
+
-
+
-
+
Current
Control
Vref
Batt
Iref
Iprog
+
+
-
-
Ts
Vref
CV
CC
+
+
CV: Constant Voltage regulation
CC: Constant Current regulation
Thermal
regulation
Li - Ion Cell
Ref 0.27V
Ref 2.87V
Batt_temp
I2C
ack from slave
ack from slave
ack from slave
w ack
start
msb Chip Address lsb
msb Register Add lsb
msb
DATA
lsb
ack
ack
stop
msb Register Add lsb
ack
msb
DATA
lsb
ack
ack from slave
ack from slave
Register 0x2A
Register 0x24
LP3913
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
www.ti.com
Li-Ion Linear Charger
Charger Architecture
The LP3913 can safely charge and maintain a single cell Li-Ion/Polymer battery operating off a regulated 6V Car
adapter, AC wall adapter, or USB power (VBUS). Input power source selection of USB/adapter is seamless. If
present, the charger will use the adapter power regardless of the presence of USB power. The connection of
either power source is detected by LP3913.
The charger module is a linear charger with constant current pre-qualification, constant current (“CC”) full-rate
charging and constant voltage (“CV”) charging. CC and CV regulation is performed using an internal Power FET
Q2 with reverse current blocking. The termination voltage is controlled to within ±0.35% at room temperature.
The power FET Q1 acts as a switch with programmable current limit for USB operation.
36
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Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LP3913



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