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)： 11/24頁(yè)
文件大小： 696K
代理商： MCP73832
2006 Microchip Technology Inc.
DS21984B-page 11
MCP73831/2
4.5
Constant-Voltage Mode
When the voltage at the V
BAT
pin reaches the regula-
tion voltage, V
REG
, constant voltage regulation begins.
The regulation voltage is factory set to 4.2V, 4.35V,
4.40V, or 4.50V with a tolerance of ±0.75%.
4.6
Charge Termination
The charge cycle is terminated when, during Constant-
Voltage mode, the average charge current diminishes
below a percentage of the programmed charge current
(established with the value of the resistor connected to
the PROG pin). A 1 ms filter time on the termination
comparator ensures that transient load conditions do
not result in premature charge cycle termination. The
percentage or ratio of the current is factory set. Refer
to
Section 1.0 “Electrical Characteristics”
for
charge termination current options and the
“Product
Identification System”
for standard options.
The charge current is latched off and the MCP73831/2
enter a Charge Complete mode.
4.7
Automatic Recharge
The MCP73831/2 continuously monitor the voltage at
the V
BAT
pin in the Charge Complete mode. If the volt-
age drops below the recharge threshold, another
charge cycle begins and current is once again
supplied to the battery or load. The recharge threshold
is factory set. Refer to
Section 1.0 “Electrical Char-
acteristics”
for recharge threshold options and the
Product Identification System for standard options.
4.8
Thermal Regulation
The MCP73831/2 limit the charge current based on
the die temperature. The thermal regulation optimizes
the charge cycle time while maintaining device
reliability. Figure 4-2 depicts the thermal regulation for
the MCP73831/2.
FIGURE 4-2:
Thermal Regulation.
4.9
Thermal Shutdown
The MCP73831/2 suspend charge if the die tempera-
ture exceeds 150°C. Charging will resume when the
die temperature has cooled by approximately 10°C.
0
75
150
225
300
375
450
525
2
3
4
5
6
7
8
9
1
1
1
1
1
1
Junction Temperature (°C)
C
R
PROG
= 2 k
Ω
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MCP73832-2ACI/OT 制造商:MICROCHIP 制造商全稱(chēng):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(chēng):Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers
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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(lèi)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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