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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP73841 Datasheet

(MCP73841 - MCP73844) Advanced Single or Dual Cell Lithium-Ion/ Lithium-Polymer Charge Management Controllers

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M MCP73841/2/3/4
Advanced Single or Dual Cell Lithium-Ion/
Lithium-Polymer Charge Management Controllers
Features
• Linear Charge Management Controllers
• High-Accuracy Preset Voltage Regulation:
- + 0.5% (max)
• Four Preset Voltage Regulation Options:
- 4.1V - MCP73841-4.1, MCP73843-4.1
- 4.2V - MCP73841-4.2, MCP73843-4.2
- 8.2V - MCP73842-8.2, MCP73844-8.2
- 8.4V - MCP73842-8.4, MCP73844-8.4
• Programmable Charge Current
• Programmable Safety Charge Timers
• Preconditioning of Deeply Depleted Cells
• Automatic End-of-Charge Control
• Optional Continuous Cell Temperature
Monitoring (MCP73841 and MCP73842)
• Charge Status Output for Direct LED Drive
• Automatic Power-Down when Input Power
Removed
• Temperature Range: -40°C to 85°C
• Packaging: MSOP-10 - MCP73841, MCP73842
MSOP-8 - MCP73843, MCP73844
Applications
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Hand-Held Instruments
• Cradle Chargers
• Digital Cameras
• MP3 Players
Typical Application Circuit
1A Lithium-Ion Battery Charger
MA2Q705
5V
10 µF
100 mNDS8434
18
SENSE DRV
2 VDD
VBAT 7
3 STAT1 VSS 6
4 EN TIMER 5
100 kMCP73843
+ Single
- Lithium-Ion
Cell
10 µF
0.1 µF
Description
The MCP7384X family of devices are highly advanced
linear charge management controllers for use in
space-limited, cost-sensitive applications. The
MCP73841 and MCP73842 combine high accuracy,
constant-voltage, constant-current regulation, cell pre-
conditioning, cell temperature monitoring, advanced
safety timers, automatic charge termination and
charge status indication in space-saving, 10-pin
MSOP packages. The MCP73841 and MCP73842
provide complete, fully-functional, stand-alone charge
management solutions.
The MCP73843 and MCP73844 employ all the
features of the MCP73841 and MCP73842, with the
exception of the cell temperature monitor. The
MCP73843 and MCP73844 are offered in 8-pin MSOP
packages.
The MCP73841 and MCP73843 are designed for
applications utilizing single-cell Lithium-Ion or Lithium-
Polymer battery packs. Two preset voltage regulation
options are available (4.1V and 4.2V) for use with either
coke or graphite anodes. The MCP73841 and
MCP73843 operate with an input voltage range of 4.5V
to 12V.
The MCP73842 and MCP73844 are designed for
applications utilizing dual series cell Lithium-Ion or
Lithium-Polymer battery packs. Two preset voltage
regulation options are available (8.2V and 8.4V). The
MCP73842 and MCP73844 operate with an input
voltage range of 8.7V to 12V.
The MCP7384X family of devices are fully specified
over the ambient temperature range of -40°C to +85°C.
Package Types
SENSE
VDD
STAT1
EN
THREF
10-Pin MSOP
1 10
29
38
47
56
DRV
VBAT
VSS
TIMER
THERM
8-Pin MSOP
SENSE
VDD
STAT1
EN
1
2
3
4
8 DRV
7 VBAT
6 VSS
5 TIMER
2004 Microchip Technology Inc.
DS21823B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP73841 Datasheet

(MCP73841 - MCP73844) Advanced Single or Dual Cell Lithium-Ion/ Lithium-Polymer Charge Management Controllers

No Preview Available !

MCP73841/2/3/4
Functional Block Diagram
VDD
SENSE
1 k
VREF
90 k
10 k
EN
VREF
Charge Current
+ Charge 90 kControl Amplifier
Current
+
Amplifier
12 k
Charge
Termination
Comparator
10 k
+
-
IREG/10
UVLO
+ Comparator
-
VUVLO
Precondition
Control
VDD
Voltage Control
Amplifier
+
-
VREF
Charge_ok
Precon
Precondition
Comp. +
-
Constant-Voltage/
Recharge Comp.
+
-
Power-On
Delay
VREF
DRV
300 k
(825 k)
VBAT
74.21 k
0.79 k
150.02 k
Bias and
Reference
Generator
VVURVELFO(1.2V)
THREF
THERM
TIMER
100 k
50 k
Temperature
+ Comparators
-
+
-
50 k
MCP73841 and MCP73842 Only
IREG/10
Oscillator
Charge Control,
Charge Timers,
And
Status Logic
Drv Stat 1
5.15 k
(4.29 k)
VSS
STAT1
Charge_ok
DS21823B-page 2
2004 Microchip Technology Inc.


Part Number MCP73841
Description (MCP73841 - MCP73844) Advanced Single or Dual Cell Lithium-Ion/ Lithium-Polymer Charge Management Controllers
Maker Microchip Technology
Total Page 24 Pages
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