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參數(shù)資料
| 型號(hào)： | MCP73832 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| 中文描述： | 微型單細(xì)胞，完全集成的鋰離子電池，鋰聚合物充電管理控制器 |
| 文件頁(yè)數(shù)： | 12/24頁(yè) |
| 文件大?。?/td> | 696K |
| 代理商： | MCP73832 |
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MCP73831/2
DS21984B-page 12
2006 Microchip Technology Inc.
5.0
DETAILED DESCRIPTION
5.1
Analog Circuitry
5.1.1
BATTERY MANAGEMENT INPUT
SUPPLY (V
DD
)
The V
DD
input is the input supply to the MCP73831/2.
The MCP73831/2 automatically enter a Power-Down
mode if the voltage on the V
DD
input falls below the
UVLO voltage (V
STOP
). This feature prevents draining
the battery pack when the V
DD
supply is not present.
5.1.2
CURRENT REGULATION SET
(PROG)
Fast charge current regulation can be scaled by plac-
ing a programming resistor (R
PROG
) from the PROG
input to V
SS
. The program resistor and the charge
current are calculated using the following equation:
The preconditioning trickle charge current and the
charge termination current are ratiometric to the fast
charge current based on the selected device options.
5.1.3
BATTERY CHARGE CONTROL
OUTPUT (V
BAT
)
The battery charge control output is the drain terminal
of an internal P-channel MOSFET. The MCP73831/2
provide constant current and voltage regulation to the
battery pack by controlling this MOSFET in the linear
region. The battery charge control output should be
connected to the positive terminal of the battery pack.
5.2
Digital Circuitry
5.2.1
STATUS INDICATOR (STAT)
The charge status output of the MCP73831 has three
different states: High (H), Low (L), and High-Imped-
ance (Hi-Z). The charge status output of the
MCP73832 is open-drain, and, as such, has two differ-
ent states: Low (L), and High-Impedance (Hi-Z). The
charge charge status output can be used to illuminate
1, 2, or tri-color LEDs. Optionally, the charge status
output can be used as an interface to a host
microcontroller.
Table 5-1 summarize the state of the status output
during a charge cycle..
5.2.2
DEVICE DISABLE (PROG)
The current regulation set input pin (PROG) can be
used to terminate a charge at any time during the
charge cycle, as well as to initiate a charge cycle or
initiate a recharge cycle.
Placing a programming resistor from the PROG input
to V
SS
enables the device. Allowing the PROG input to
float or by applying a logic-high input signal, disables
the device and terminates a charge cycle. When
disabled, the device’s supply current is reduced to
25
μ
A, typically.
I
REG
V
R
PROG
1000
=
Where:
R
PROG
I
REG
=
=
kOhms
milliampere
TABLE 5-1:
STATUS OUTPUT
Charge Cycle State
STAT1
MCP73831 MCP73832
Shutdown
No Battery Present
Preconditioning
Constant-Current Fast
Charge
Constant Voltage
Charge Complete –
Standby
Hi-Z
Hi-Z
L
L
Hi-Z
Hi-Z
L
L
L
H
L
Hi-Z
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP73832-2ACI/MC | 功能描述:電池管理 Li-Ion/Li-Poly Charg Mgnt 4.2V Vreg out 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 |
| MCP73832-2ACI/OT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ADI/MC | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ADI/OT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ATI/MC | 功能描述:電池管理 Li-Ion/Li-Poly Charg Mgnt 4.2V Vreg out 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 |
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