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參數(shù)資料
| 型號(hào)： | MCP73828 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Single Cell Lithium-Ion Charge Management Controller with Charge Complete Indicator and Temperature Monitor |
| 中文描述： | 單節(jié)鋰離子電池充電管理控制器，充電完畢指示燈和溫度監(jiān)測(cè)器 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大小： | 499K |
| 代理商： | MCP73828 |
2002 Microchip Technology Inc.
DS21706A-page 9
MCP73828
4.0
DEVICE OVERVIEW
The MCP73828 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 MCP73828 automatically performs a series
of safety checks to qualify the charge. The SHDN pin
must be above the logic high level, and the cell temper-
ature monitor must be within the upper and lower
threshold limits. The qualification parameters are con-
tinuously monitored. Deviation beyond the limits, auto-
matically suspends the charge cycle.
After the qualification parameters have been met, the
MCP73828 initiates a charge cycle. The charge com-
plete output, CD10, is pulled low throughout the pre-
conditioning and controlled current phases (see
Table 5-1 for charge complete outputs). If the cell volt-
age is below the preconditioning threshold, 2.4V typi-
cally, the MCP73828 preconditions the cell with a
scaled back current. The preconditioning current is set
to approximately 43% of the fast charge peak current.
The
preconditioning
safely
depleted cells and minimizes heat dissipation in the
external pass transistor during the initial charge cycle.
replenishes
deeply
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
MCP73828 monitors the cell voltage at the V
OUT
pin.
This input is tied directly to the positive terminal of the
battery. The MCP73828 is offered in two fixed-voltage
versions for battery packs with either coke or graphite
anodes:
4.1V
(MCP73828-4.1)
(MCP73828-4.2).
and
4.2V
4.4
Charge Cycle Completion
The charge cycle can be terminated by a host micro-
controller when the charge current has diminished
below approximately 10% of the peak output voltage
level. The charge complete output will go to a high
impedance state signaling when the charge can be ter-
minated. The charge is terminated by pulling the shut-
down pin, SHDN, to a logic Low level.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP73828-4.1VUA | 功能描述:電池管理 W/ Charge Comp 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 |
| MCP73828-4.1VUATR | 功能描述:電池管理 W/ Charge Comp 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 |
| MCP73828-4.2VUA | 功能描述:電池管理 W/ Charge Comp 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 |
| MCP73828-4.2VUATR | 功能描述:電池管理 W/ Charge Comp 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 |
| MCP7382XEV | 功能描述:電源管理IC開發(fā)工具 MCP7382X Li-Ion Batt Charger RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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