參數(shù)資料
型號(hào)： MCP73827
廠商： Microchip Technology Inc.
英文描述： Single Cell Lithium-Ion Charge Management Controller with Mode Indicator and Charge Current Monitor(單室鋰粒子充電器)
中文描述： 單節(jié)鋰離子電池充電管理控制器模式指示燈和充電電流監(jiān)視器（單室鋰粒子充電器）
文件頁(yè)數(shù)： 9/24頁(yè)
文件大?。?/td> 555K
代理商： MCP73827
2002 Microchip Technology Inc.
DS21704A-page 9
MCP73827
4.0
DEVICE OVERVIEW
The MCP73827 is a linear charge management con-
troller. Refer to the functional block diagram on page 2
and the typical application circuit, Figure 6-1.
4.1
Charge Qualification and
Preconditioning
Upon insertion of a battery or application of an external
supply, the MCP73827 verifies the state of the SHDN
pin. The SHDN pin must be above the logic High level.
If the SHDN pin is above the logic High level, the
MCP73827 initiates a charge cycle. The charge status
output, MODE, is pulled low throughout throughout the
preconditioning and controlled current phases (see
Table 5-1 for charge status outputs). If the cell is below
the preconditioning threshold, 2.4V typically, the
MCP73827 preconditions the cell with a scaled back
current. The preconditioning current is set to approxi-
mately 43% of the fast charge peak current. The pre-
conditioning safely replenishes deeply depleted cells
and minimizes heat dissipation in the external pass
transistor during the initial charge cycle.
4.2
Controlled Current Regulation - Fast
Charge
Preconditioning ends and fast charging begins when
the cell voltage exceeds the preconditioning threshold.
Fast charge utilizes a foldback current scheme based
on the voltage at the V
SNS
input developed by the drop
across an external sense resistor, R
SENSE
, and the out-
put voltage, V
BAT
. Fast charge continues until the cell
voltage reaches the regulation voltage, V
REG
.
4.3
Constant Voltage Regulation
When the cell voltage reaches the regulation voltage,
V
REG
, constant voltage regulation begins. The
MCP73827 monitors the cell voltage at the V
BAT
pin.
This input is tied directly to the positive terminal of the
battery. The MCP73827 is offered in two fixed-voltage
versions for battery packs with either coke or graphite
anodes:
4.1V
(MCP73827-4.1)
(MCP73827-4.2).
and
4.2V
4.4
Charge Cycle Completion
The charge cycle can be terminated by a host micro-
controller when the output of the charge current moni-
tor, I
MON
, has diminished below approximately 10% of
the peak output voltage level. Alternatively, the transi-
tion of the charge status output, MODE, can be used to
initialize a timer to terminate the charge. The charge is
terminated by pulling the shutdown pin, SHDN, to a
logic Low Level.
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP73827-4.1VUA 功能描述:電池管理 W/ Charge Curnt Mon RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MCP73827-4.1VUATR 功能描述:電池管理 W/ Charge Curnt Mon RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MCP73827-4.2VUA 功能描述:電池管理 W/ Charge Curnt Mon RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MCP73827-4.2VUATR 功能描述:電池管理 W/ Charge Curnt Mon RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MCP73828 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Single Cell Lithium-Ion Charge Management Controller with Charge Complete Indicator and Temperature Monitor
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