MCP73826 Microchip Technology, MCP73826 Datasheet
MCP73826
Manufacturer Part Number
MCP73826
Description
Single Cell Lithium-Ion Charge Management Controller
Manufacturer
Microchip Technology
Datasheet
1.MCP73826.pdf
(24 pages)
Available stocks
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Company:
Part Number:
MCP73826-4.1VCHTR
Manufacturer:
Microchip Technology
Quantity:
4 850
Part Number:
MCP73826-4.1VCHTR
Manufacturer:
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Part Number:
MCP73826-4.2VCHTR
Manufacturer:
MICROCHIP/微芯
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20 000
Features
• Linear Charge Management Controller for Single
• High Accuracy Preset Voltage Regulation:
• Two Preset Voltage Regulation Options:
• Programmable Charge Current
• Automatic Cell Preconditioning of Deeply
• Automatic Power-Down when Input Power
• 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
M
V
5V
Lithium-Ion Cells
- 4.1V - MCP73826-4.1
- 4.2V - MCP73826-4.2
Depleted Cells, Minimizing Heat Dissipation Dur-
ing Initial Charge Cycle
Removed
IN
2002 Microchip Technology Inc.
10 µF
Single Cell Lithium-Ion Charge Management Controller
MA2Q705
+1% (max)
100 k
500 mA Lithium-Ion Battery Charger
100 m
5
1
V
SHDN
V
IN
MCP73826
6
SNS
NDS8434
V
4
GND
DRV
V
BAT
3
2
10 µF
+
-
Single
Lithium-Ion
Cell
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
6-Pin SOT-23A
MCP73826
SHDN 1
GND
V
BAT
2
3
MCP73826
6
5
4
DS21705A-page 1
V
V
V
SNS
IN
DRV
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