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MCP73834 Datasheet

  • MCP73834

  • 26頁

  • MICROCHIP   MICROCHIP

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MCP73833/4
Stand-Alone Linear Li-Ion / Li-Polymer Charge
Management Controller
Features
鈥?Complete Linear Charge Management Controller
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
鈥?Constant Current / Constant Voltage Operation
with Thermal Regulation
鈥?High Accuracy Preset Voltage Regulation:
- 4.2V, 4.35V, 4.4V, or 4.5V, + 0.75%
鈥?Programmable Charge Current: 1A Maximum
鈥?Preconditioning of Deeply Depleted Cells
- Selectable Current Ratio
- Selectable Voltage Threshold
鈥?Automatic End-of-Charge Control
- Selectable Current Threshold
- Selectable Safety Time Period
鈥?Automatic Recharge
Description
The MCP73833/4 is a highly advanced linear charge
management controller for use in space-limited, cost
sensitive applications. The MCP73833/4 is available in
a 10-Lead, 3mm x 3mm DFN package or a 10-Lead,
MSOP package. Along with its small physical size, the
low number of external components required makes
the MCP73833/4 ideally suited for portable applica-
tions. For applications charging from a USB port, the
MCP73833/4 can adhere to all the specifications
governing the USB power bus.
The MCP73833/4 employs a constant current/constant
voltage charge algorithm with selectable precondition-
ing and charge termination. The constant voltage
regulation is fixed with four available options: 4.20V,
4.35V, 4.40V, or 4.50V, to accomodate new, emerging
battery charging requirements. The constant current
value is set with one external resistor. The
MCP73833/4 limits the charge current based on die
temperature during high power or high ambient condi-
tions. 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 set
to 100%
. Refer to
Section 1.0 鈥淓lectrical
Characteristics鈥?/span>
for available options and the
鈥淧roduct Indentification System鈥?/div>
for standard
options.
The MCP73833/4 is fully specified over the ambient
temperature range of -40擄C to +85擄C.
- Selectable Voltage Threshold
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Two Charge Status Outputs
Cell Temperature Monitor
Low-Dropout Linear Regulator Mode
Automatic Power-Down when Input Power
Removed
鈥?Under Voltage Lockout
鈥?Numerous Selectable Options Available for a
Variety of Applications:
- Refer to
Section 1.0 鈥淓lectrical
Characteristics鈥?/span>
for Selectable Options
- Refer to the
鈥漃roduct Identification
System鈥?/span>
for Standard Options
鈥?Available Packages:
- 3mm x 3mm DFN-10
- MSOP-10
Package Types
DFN-10
V
DD
1
V
DD
2
STAT1 3
STAT2 4
V
SS
5
10 V
BAT
9 V
BAT
8 THERM
7 PG(TE)
6 PROG
10
9
8
7
6
V
BAT
V
BAT
THERM
PG(TE)
PROG
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Lithium-Ion / Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Digital Cameras
MP3 Players
Bluetooth Headsets
USB Chargers
MSOP-10
V
DD
V
DD
STAT1
STAT2
V
SS
1
2
3
4
5
漏
2006 Microchip Technology Inc.
DS22005A-page 1

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