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MCP73826-4.2VCHTR bảng dữ liệu(PDF) 1 Page - Microchip Technology

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Giải thích chi tiết về linh kiện  Single Cell Lithium-Ion Charge Management Controller
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MCP73826-4.2VCHTR bảng dữ liệu(HTML) 1 Page - Microchip Technology

  MCP73826-4.2VCHTR Datasheet HTML 1Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 2Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 3Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 4Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 5Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 6Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 7Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 8Page - Microchip Technology MCP73826-4.2VCHTR Datasheet HTML 9Page - Microchip Technology Next Button
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 2002 Microchip Technology Inc.
DS21705A-page 1
M
MCP73826
Features
• Linear Charge Management Controller for Single
Lithium-Ion Cells
• High Accuracy Preset Voltage Regulation:
+1% (max)
• Two Preset Voltage Regulation Options:
- 4.1V - MCP73826-4.1
- 4.2V - MCP73826-4.2
• Programmable Charge Current
• Automatic Cell Preconditioning of Deeply
Depleted Cells, Minimizing Heat Dissipation Dur-
ing Initial Charge Cycle
• Automatic Power-Down when Input Power
Removed
• Temperature Range: -20°C to +85°C
• Packaging: 6-Pin SOT-23A
Applications
• Single Cell Lithium-Ion Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Hand Held Instruments
• Cradle Chargers
• Digital Cameras
Typical Application Circuit
Description
The MCP73826 is a linear charge management con-
troller for use in space-limited, cost sensitive applica-
tions. The MCP73826 combines high accuracy
constant voltage, controlled current regulation, and cell
preconditioning in a space saving 6-pin SOT-23A pack-
age. The MCP73826 provides a stand-alone charge
management solution.
The MCP73826 charges the battery in three phases:
preconditioning, controlled current, and constant volt-
age. If the battery voltage is below the internal low-volt-
age threshold, the battery is preconditioned with a
foldback current. The preconditioning phase protects
the lithium-ion cell and minimizes heat dissipation.
Following the preconditioning phase, the MCP73826
enters the controlled current phase. The MCP73826
allows for design flexibility with a programmable charge
current set by an external sense resistor. The charge
current is ramped up, based on the cell voltage, from
the foldback current to the peak charge current estab-
lished by the sense resistor. This phase is maintained
until the battery reaches the charge-regulation voltage.
Then, the MCP73826 enters the final phase, constant
voltage. The accuracy of the voltage regulation is better
than ±1% over the entire operating temperature range
and supply voltage range. The MCP73826-4.1 is preset
to a regulation voltage of 4.1V, while the MCP73826-
4.2 is preset to 4.2V.
The MCP73826 operates with an input voltage range
from 4.5V to 5.5V. The MCP73826 is fully specified
over the ambient temperature range of -20°C to +85°C.
Package Type
+
-
GND
V
DRV
V
SNS
V
IN
V
BAT
SHDN
12
3
6
5
4
10 µF
100 k
100 m
V
IN
Single
Lithium-Ion
Cell
NDS8434
MA2Q705
500 mA Lithium-Ion Battery Charger
5V
10 µF
MCP73826
6-Pin SOT-23A
GND
VDRV
VSNS
VIN
VBAT
SHDN 1
2
3
6
5
MCP73826
4
Single Cell Lithium-Ion Charge Management Controller


Số phần tương tự - MCP73826-4.2VCHTR

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Mô tả tương tự - MCP73826-4.2VCHTR

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