MCP73827 Microchip Technology, Inc., MCP73827 Datasheet - Page 8

• Manufacturer Part Number: MCP73827
• Description: The MCP73827 is a Battery Charger Controller For Single Cell Li-ion Batteries
• Manufacturer: Microchip Technology, Inc.

MCP73827
3.0
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
3.1
Input to force charge termination, initiate charge, or ini-
tiate recharge.
3.2
Connect to negative terminal of battery.
3.3
Open-drain drive for connection to an LED for charge
status indication. Alternatively, a pull-up resistor can be
applied for interfacing to a microcontroller. A low
impedance state indicates foldback current limit or con-
trolled current phase. A high impedance indicates con-
stant voltage phase or battery cell disconnected.
3.4
Amplified output of the voltage difference between V
and V
put with an A/D converter.
DS21704A-page 8
Pin
1
2
3
4
5
6
7
8
SNS
PIN DESCRIPTION
Logic Shutdown (SHDN)
Battery Management 0V Reference
(GND)
Charge Status Output (MODE)
Charge Current Monitor (I
. A host microcontroller can monitor this out-
MODE
SHDN
Name
V
V
GND
I
V
MON
V
DRV
SNS
BAT
IN
Pin Function Table.
Logic Shutdown
Battery Management
0V Reference
Charge Status Output
Charge Current Monitor
Cell Voltage Monitor Input
Drive Output
Charge Current Sense Input
Battery Management
Input Supply
Description
MON
)
IN
3.5
Voltage sense input. Connect to positive terminal of
battery. Bypass to GND with a minimum of 10 µF to
ensure loop stability when the battery is disconnected.
A precision internal resistor divider regulates the final
voltage on this pin to VREG.
3.6
Direct output drive of an external P-channel MOSFET
pass transistor for current and voltage regulation.
3.7
Charge current is sensed via the voltage developed
across an external precision sense resistor. The sense
resistor must be placed between the supply voltage
(V
50 m
1 A, typically.
3.8
A supply voltage of 4.5V to 5.5V is recommended.
Bypass to GND with a minimum of 10 µF.
IN
) and the source of the external pass transistor. A
sense resistor produces a fast charge current of
Cell Voltage Monitor Input (V
Drive Output (V
Charge Current Sense Input (V
Battery Management Input Supply
(V
IN
)
2002 Microchip Technology Inc.
DRV
)
BAT
SNS
)
)