- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385575 > MCP73828 (Microchip Technology Inc.) Single Cell Lithium-Ion Charge Management Controller with Charge Complete Indicator and Temperature Monitor PDF資料下載
參數(shù)資料
| 型號： | 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)測器 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 499K |
| 代理商： | MCP73828 |
2002 Microchip Technology Inc.
DS21706A-page 13
MCP73828
V
INMIN
is the minimum input voltage source
I
OUT
is the maximum peak fast charge current
R
SENSE
is the sense resistor
Worst case, V
GS
with a 5V, +/-10% input voltage
source, 100 m
, 1% sense resistor, and a maximum
sink voltage of 1.6V is:
At this worst case V
GS
, the R
DSON
of the MOSFET
must be low enough as to not impede the performance
of the charging system. The maximum allowable
R
DSON
at the worst case V
GS
is:
The Fairchild NDS8434 and International Rectifier
IRF7404 both satisfy these requirements.
6.1.1.3
EXTERNAL CAPACITORS
The MCP73828 is stable with or without a battery load.
In order to maintain good AC stability in the constant
voltage mode, a minimum capacitance of 10 μF is rec-
ommended to bypass the V
BAT
pin to GND. This capac-
itance provides compensation when there is no battery
load. In addition, the battery and interconnections
appear inductive at high frequencies. These elements
are in the control feedback loop during constant voltage
mode. Therefore, the bypass capacitance may be nec-
essary 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 ESR
(Effective Series Resistance) value. The actual value of
the capacitor and its associated ESR depends on the
forward trans conductance, g
m
, and capacitance of the
external pass transistor. A 10 μF tantalum or aluminum
electrolytic capacitor at the output is usually sufficient
to ensure stability for up to a 1 A output current.
6.1.1.4
REVERSE BLOCKING PROTECTION
The optional reverse blocking protection diode
depicted in Figure 6-1 provides protection from a
faulted or shorted input or from a reversed polarity input
source. Without the protection diode, a faulted or
shorted input would discharge the battery pack through
the body diode of the external pass transistor.
If a reverse protection diode is incorporated in the
design, it should be chosen to handle the peak fast
charge current continuously at the maximum ambient
temperature. In addition, the reverse leakage current of
the diode should be kept as small as possible.
6.1.1.5
SHUTDOWN INTERFACE
In the stand-alone configuration, the shutdown pin is
generally tied to the input voltage. The MCP73828 will
automatically enter a low power mode when the input
voltage is less than the output voltage reducing the bat-
tery drain current to 10 μA, typically.
By connecting the shutdown pin as depicted in
Figure 6-1, the battery drain current may be further
reduced. In this application, the battery drain current
becomes a function of the reverse leakage current of
the reverse protection diode.
6.1.1.6
CELL TEMPERATURE MONITOR
As discussed in Section 5.1.1, the MCP73828 can
monitor a temperature range for –0.5°C to 44.2°C. This
temperature range can be expanded or shifted by plac-
ing fixed value resistors in series/parallel combinations
with the thermistor (see Figure 6-1). Given that the
nominal output current of the THERM pin is 25 μA, the
resistor values must satisfy the following equations:
Where:
R
S
is the fixed series resistance
R
P
is the fixed parallel resistance
R
THERMISTOR-H
is the NTC thermistor resistance
at the upper temperature of interest
R
THERMISTOR-C
is the NTC thermistor resistance
at the lower temperature of interest.
For example, by utilizing a 931
resistor in series with
the typical NTC thermistor described previously, the
monitored temperature window will shift to 0°C to
+50°C, typically. Again, with the same thermistor, a
1 k
series resistor and a 140 k
parallel resistor will
produce a monitored window of -5°C to +50°C, typi-
cally.
V
GS
1.6V
4.5V
758mA
99m
×
–
(
)
–
2.8
–
V
=
=
R
DSON
V
-------------------–
I
R
I
OUT
V
BATMAX
–
=
R
DSON
4.5V
758mA
99m
×
–
4.242V
–
758mA
242m
=
=
R
S
R
R
P
THERMISTOR
R
THERMISTOR
H
–
+
H
–
------------R
+
4520
typ
(
)
=
R
S
R
R
P
THERMISTOR
R
THERMISTOR
C
–
+
C
–
-------------R
+
33560
typ
(
)
=
相關PDF資料 |
PDF描述 |
|---|---|
| MCP9700 | Low-Power Voltage Output Temperature Sensor |
| MCP9701 | Low-Power Voltage Output Temperature Sensor |
| MCR100 | Sensitive Gate Silicon Controlled Rectifiers(可控硅整流管) |
| MCR12DSM | Sensitive Gate Silicon Controlled Rectifiers(可控硅整流管) |
| MCR12DSN | Sensitive Gate Silicon Controlled Rectifiers(可控硅整流管) |
相關代理商/技術參數(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 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發(fā)布緊急采購，3分鐘左右您將得到回復。