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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP73831 Datasheet

(MCP73831 / MCP73832) Li-Polymer Charge Management Controllers

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MCP73831/2
Miniature Single-Cell, Fully Integrated Li-Ion,
Li-Polymer Charge Management Controllers
Features:
• Linear Charge Management Controller:
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse Discharge Protection
• High Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options:
- 4.20V, 4.35V, 4.40V, 4.50V
• Programmable Charge Current: 15 mA to 500 mA
• Selectable Preconditioning:
- 10%, 20%, 40%, or Disable
• Selectable End-of-Charge Control:
- 5%, 7.5%, 10%, or 20%
• Charge Status Output
- Tri-State Output - MCP73831
- Open-Drain Output - MCP73832
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:
- 8-Lead, 2 mm x 3 mm DFN
- 5-Lead, SOT-23
Applications:
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers
Typical Application
VIN
4.7 F
500 mA Li-Ion Battery Charger
4 VDD
VBAT 3
4.7 F
PROG 5
+ Single
-
Li-Ion
Cell
470
1 STAT
VSS 2
MCP73831
2 k
Description:
The MCP73831/2 devices are highly advanced linear
charge management controllers for use in space-
limited, cost-sensitive applications. The MCP73831/2
are available in an 8-Lead, 2 mm x 3 mm DFN package
or a 5-Lead, SOT-23 package. Along with their small
physical size, the low number of external components
required make the MCP73831/2 ideally suited for
portable applications. For applications charging from a
USB port, the MCP73831/2 adhere to all the
specifications governing the USB power bus.
The MCP73831/2 employ a constant-current/constant-
voltage charge algorithm with selectable
preconditioning and charge termination. The constant
voltage regulation is fixed with four available options:
4.20V, 4.35V, 4.40V or 4.50V, to accommodate new,
emerging battery charging requirements. The constant
current value is set with one external resistor. The
MCP73831/2 devices limit 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
termination value and automatic recharge threshold.
The preconditioning value and charge termination
value are set as a ratio or percentage of the
programmed constant 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 MCP73831/2 devices are fully specified over the
ambient temperature range of -40°C to +85°C.
Package Types
MCP73831/2
2×3 DFN*
MCP73831/2
SOT-23-5
VDD 1
8 PROG STAT 1
VDD 2 EP 7 NC
VBAT 3 9 6 VSS
VSS 2
VBAT 3
VBAT 4
5 STAT
5 PROG
4 VDD
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2005-2014 Microchip Technology Inc.
DS20001984G-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP73831 Datasheet

(MCP73831 / MCP73832) Li-Polymer Charge Management Controllers

No Preview Available !

MCP73831/2
Functional Block Diagram
VDD
6 µA
DIRECTION
CONTROL
6 µA
G=0.001
PROG
0.5 µA
REFERENCE
GENERATOR
VREF(1.22V)
111 k
361 k
89 k
7 k
190 k
43.6 k
+
- PRECONDITION
+ CA
-
3.9 k
182.3 k
+
-
TERMINATION
+
-
CHARGE
15 k
+ VA
-
111 k
0.5 µA
+
-
+
477 k
VBAT
-
+
VSS
255 k
100 k
-
SHDN
DIRECTION
CONTROL
UVLO
VBAT
MCP73831
ONLY
VDD
STAT
DS20001984G-page 2
2005-2014 Microchip Technology Inc.


Part Number MCP73831
Description (MCP73831 / MCP73832) Li-Polymer Charge Management Controllers
Maker Microchip Technology
Total Page 28 Pages
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