MCP73831 Microchip Technology, Inc., MCP73831 Datasheet
MCP73831
Manufacturer Part Number
MCP73831
Description
Manufacturer
Microchip Technology, Inc.
Datasheet
1.MCP73831.pdf
(24 pages)
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Features:
• Linear Charge Management Controller:
• High Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options:
• Programmable Charge Current
• Selectable Preconditioning
• Selectable End-of-Charge Control
• Charge Status Output
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:
Applications:
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers
Typical Application
© 2005 Microchip Technology Inc.
4.7 F
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse Discharge Protection
- 4.20V, 4.35V, 4.40V, 4.50V
- 8-Lead, 2 mm x 3 mm DFN
- 5-Lead, SOT23
V
IN
470
500 mA Li-Ion Battery Charger
Miniature Single Cell, Fully Integrated Li-Ion,
Li-Polymer Charge Management Controller
4
1
V
STAT
MCP73831
DD
PROG
V
V
BAT
SS
4.7 F
3
5
2
2 k
+
-
Single
Li-Ion
Cell
Description:
The MCP73831 is a highly advanced linear charge
management controller for use in space-limited, cost
sensitive applications. The MCP73831 is available in
an 8-Lead, 2 mm x 3 mm DFN package or a 5-Lead,
SOT23 package. Along with its small physical size, the
low number of external components required makes
the MCP73831 ideally suited for portable applications.
For applications charging from a USB port, the
MCP73831 adheres to all the specifications governing
the USB power bus.
The MCP73831 employs a constant-current/constant-
voltage charge algorithm with selectable precondition-
ing and charge termination. The constant voltage regu-
lation is fixed with four available options: 4.20V, 4.35V,
4.40V, or 4.50V, to accommodate new, emerging bat-
tery charging requirements. The constant current value
is set with one external resistor. The MCP73831 limits
the charge current based on die temperature during
high power or high ambient conditions. This thermal
regulation optimizes the charge cycle time while
maintaining device reliability.
Several options are available for the preconditioning
threshold, preconditioning current value, charge termi-
nation value, and automatic recharge threshold. The
preconditioning value and charge termination value are
set as a ratio, or percentage, of the programmed con-
stant current value. Preconditioning can be disabled.
Refer to Section 1.0 “Electrical Characteristics” for
available options and the Product Identification System
for standard options.
The MCP73831 is fully specified over the ambient
temperature range of -40°C to +85°C.
Package Types
STAT
V
V
BAT
SS
1
2
3
MCP73831
SOT23-5
5
4
PROG
V
DD
V
V
V
V
BAT
BAT
(2 mm x 3 mm)
DD
DD
8-Lead DFN
1
2
3
4
DS21984A-page 1
8
7
6
5
PROG
NC
V
STAT
SS
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