- 您现在的位置：买卖IC网 > PDF目录85450 > TC3827-4.1VUATR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 PDF资料下载
参数资料
| 型号： | TC3827-4.1VUATR |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 5/10页 |
| 文件大小： | 132K |
| 代理商： | TC3827-4.1VUATR |
4
Lithium-Ion Battery Charger
TC3827
TC3827-2 12/12/00
2001 Microchip Technology Inc.
DS21558A
APPLICATIONS INFORMATION
A typical Li-Ion cell should be charged at a controlled
current until it reaches 4.1V or 4.2V (depending on the type
of cell), then charged at this voltage. The TC3827 is de-
signed to offer the maximum integration and function with a
small application circuit. The only necessary external com-
ponents are a PMOS , two small capacitors, and an RSENSE.
The charge current profile can be monitored using the
voltage signal at IMON. The use of an LED as a status
indicator is optional. The application circuit is shown in
Figure 1.
SELECTING EXTERNAL COMPONENTS
Power Supply Input
In most applications, this will be a small “wall cube”
switching converter with an output voltage limit range of 5V
to 6V.
P-Channel Pass Device
The PMOS is used to regulate current from the source
into the Li-Ion cell. Specifications to consider when choosing
an appropriate PMOS are the minimum drain-source break-
down voltage, the minimum turn-on threshold voltage
(VGSTH), drain current and power-dissipation capabilities.
Bypass Capacitors
Bypass VIN with a capacitor value of at least 10F.
Bypass VOUT with a capacitor value of at least 1F.
CHARGER MODES DESCRIPTION
Initiating a Charge Cycle
The TC3827 initiates a charge upon toggling the shut-
down pin high, insertion of the battery or application of an
external power source. The TC3827 provides a foldback
current limited charge where an external current sense
resistor sets IMAX. The voltage drop across the current sense
resistor is applied to the VIN -VSNS pins and presented to the
current limited control-loop.The current loop will protect a
deeply discharged (or shorted) battery by folding back the
current limited charge, and reduces the power dissipation in
PMOS.
Current Limited, Constant-voltage Charge
Cycle
The TC3827 begins to charge the Li-Ion cell by turning
on the external PMOS. The charge continues until the
battery voltage rises to the lithium-ion cell voltage of 4.2V or
4.1V (depending on type of cell). As the battery voltage
reaches the regulated output voltage, the internal feedback
Figure 3. TC3827 Test Circuit
V
REG
V
OUT
I
REG
I
MAX
I
FOLDBACK
Constant
Voltage
Mode
Foldback
Current
Limited
Mode
I
SC
I
OUT
Figure 2. TC3827 Charging Characteristic
R
SENSE
=500m
S
G
D
NDP6020P
PMOS
V
SNS
V
DRV
GND
V
IN
V
IN
V
OUT
V
OUT
SHDN
IMON
MODE
10
F
TC3827
22
F
相关PDF资料 |
PDF描述 |
|---|---|
| TC53C3502ECTTR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| TC53C4102ECTTR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| TES113ZD-AN2V | 1-OUTPUT 150 W DC-DC REG PWR SUPPLY MODULE |
| THW1224S85 | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| TC44VC5003EMB713 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDFP4 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC3873 | 制造商:TRANSCOM 制造商全称:TRANSCOM 功能描述:5.25 - 5.875 GHz 3W prematched FETs |
| TC3875A-V19 | 制造商:HENKEL 功能描述:ADHESIVE, ANAEROBIC, CONTAINER, 30ML, Adhesive Type:Anaerobic, Chemical Color:Ye 制造商:Henkel Corporation / Loctite 功能描述:ADHESIVE, ANAEROBIC, CONTAINER, 30ML, Adhesive Type:Anaerobic, Chemical Color:Yellow, Dispensing Method:Container, Volume:30ml, Color:Yellow , RoHS Compliant: Yes |
| TC3875B-V19 | 制造商:Henkel Corporation / Loctite 功能描述:ADHESIVE, ANAEROBIC, SYRINGE, 30ML; Adhesive Type:Anaerobic; Chemical Color:Yellow; Dispensing Method:Syringe; Volume:30ml; Chemical Solution:Acrylate; Color:Yellow ;RoHS Compliant: Yes |
| TC3876A-V19 | 制造商:HENKEL 功能描述:ADHESIVE, ANAEROBIC, SYRINGE, 30ML, Adhesive Type:Anaerobic, Chemical Color:Yell |
| TC3876B-V19 | 制造商:HENKEL 功能描述:ADHESIVE, ANAEROBIC, SYRINGE, 30ML, Adhesive Type:Anaerobic, Chemical Color:Blue |
发布紧急采购，3分钟左右您将得到回复。