MCP73828 Microchip Technology, MCP73828 Datasheet - Page 8

• Manufacturer Part Number: MCP73828
• Description: Single Cell Lithium-Ion Charge Management Controller
• Manufacturer: Microchip Technology

MCP73828
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
Charging is inhibited when the input is outside the
upper and lower threshold limits. Connection of a
10 k
function when cell temperature monitoring is not
required.
3.4
Open-drain drive for connection to an LED for charge
complete indication. Alternatively, a pull-up resistor can
be applied for interfacing to a microcontroller. A low
impedance state indicates charging. A high impedance
indicates that the charge current has diminished below
10% of the peak charge current.
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 V
DS21706A-page 8
Pin
1
2
3
4
5
6
7
8
resistor between THERM and GND disables the
PIN DESCRIPTION
Logic Shutdown (SHDN)
Battery Management 0V Reference
(GND)
Cell Temperature Monitor (THERM)
Charge Complete Output (CD10)
Cell Voltage Monitor Input (V
THERM
Name
SHDN
CD10
V
V
GND
V
V
DRV
SNS
BAT
IN
Pin Function Table.
Logic Shutdown
Battery Management
0V Reference
Cell Temperature Monitor
Charge Complete Output
Cell Voltage Monitor Input
Drive Output
Charge Current Sense Input
Battery Management
Input Supply
REG
.
Description
BAT
)
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
Drive Output (V
Charge Current Sense Input V
Battery Management Input Supply
(V
IN
)
2002 Microchip Technology Inc.
DRV
)
SNS
)