參數(shù)資料
型號(hào)： MCP73862
廠商： Microchip Technology Inc.
英文描述： Advanced Dual Cell, Fully Integrated Li-Ion /Li-Polymer Charge Management Controllers(增強(qiáng)型兩節(jié)高度集成的鋰離子/鋰聚合物充電管理控制器)
中文描述： 先進(jìn)的雙電池，完全集成的鋰離子/鋰聚合物充電管理控制器（增強(qiáng)型兩節(jié)高度集成的鋰離子/鋰聚合物充電管理控制器）
文件頁(yè)數(shù)： 19/26頁(yè)
文件大?。?/td> 402K
代理商： MCP73862
2004 Microchip Technology Inc.
DS21893A-page 19
MCP73861/2
Power dissipation with a 5V, ±10% input voltage source
is:
With the battery charger mounted on a 1 in
2
pad of
1 oz. copper, the junction temperature rise is 60°C,
approximately. This would allow for a maximum operat-
ing ambient temperature of 50°C before thermal
regulation is entered.
6.1.1.3
External Capacitors
The MCP7386X is stable with or without a battery load.
In order to maintain good AC stability in the Constant
Voltage mode, a minimum capacitance of 4.7 μF is
recommended to bypass the V
BAT
pin to V
SS
. This
capacitance provides compensation when there is no
battery load. In addition, the battery and interconnec-
tions appear inductive at high frequencies. These
elements are in the control feedback loop during
constant voltage mode. Therefore, the bypass capaci-
tance may be necessary to compensate for the
inductive nature of the battery pack.
Virtually any good quality output filter capacitor can be
used, independent of the capacitor’s minimum Effec-
tive Series Resistance (ESR) value. The actual value of
the capacitor and its associated ESR depends on the
output load current. A 4.7 μF ceramic, tantalum or alu-
minum electrolytic capacitor at the output is usually
sufficient to ensure stability for up to a 1A output
current.
6.1.1.4
Reverse-Blocking Protection
The MCP7386X provides protection from a faulted or
shorted input, or from a reversed-polarity input source.
Without the protection, a faulted or shorted input would
discharge the battery pack through the body diode of
the internal pass transistor.
6.1.1.5
Enable Interface
In the stand-alone configuration, the enable pin is gen-
erally tied to the input voltage. The MCP7386X auto-
matically enters a low-power mode when voltage on
the V
DD
input falls below the undervoltage lockout
voltage (V
STOP
) reducing the battery drain current to
0.23 μA, typically.
6.1.1.6
Charge Status Interface
Two status outputs provide information on the state of
charge. The current-limited, open-drain outputs can be
used to illuminate external LEDs. Refer to Table 5-1 for
a summary of the state of the status outputs during a
charge cycle.
6.2
PCB Layout Issues
For optimum voltage regulation, place the battery pack
as close as possible to the device’s V
BAT
and V
SS
pins.
It is recommended to minimize voltage drops along the
high current carrying PCB traces.
If the PCB layout is used as a heatsink, adding many
vias in the heatsink pad can help conduct more heat to
the back-plane of the PCB, thus reducing the maximum
junction temperature.
PowerDissipation
5.5V
2.7V
–
(
)
575mA
×
1.61W
=
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP73862-I/ML 功能描述:電池管理 Daul High Integrated 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
MCP73862-I/MLG 功能描述:電池管理 Daul High Integrated Lead Free Package 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
MCP73862-I/SL 功能描述:電池管理 Charge mgmt contr 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
MCP73862T 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Advanced Single or Dual Cell, Fully Integrated Li-Ion/Li-Polymer Charge Management
MCP73862T-I/ML 功能描述:電池管理 Daul High Integrated 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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