MCP73223-22SI/MF MICROCHIP [Microchip Technology], MCP73223-22SI/MF Datasheet - Page 13

• Manufacturer Part Number: MCP73223-22SI/MF
• Description: Lithium Iron Phosphate (LiFePO4) Battery Charge Management Controller with Input Overvoltage Protection
• Manufacturer: MICROCHIP [Microchip Technology]

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
A supply voltage of [V
recommended for MCP73123, while a supply voltage
of [V
MCP73223. Bypass to V
The V
suddenly rise of input voltage from spikes or low cost
ac-dc wall adapter.
3.2
Connect to the positive terminal of the battery. Bypass
to V
when the battery is disconnected. The MCP73123 is
designed to provide 3.6V battery regulation voltage for
LiFePO
Li-Ion or Li-Poly battery is used.
3.3
No connect.
3.4
STAT is an open-drain logic output for connection to an
LED for charge status indication in standalone
applications. Alternatively, a pull-up resistor can be
applied for interfacing to a host microcontroller. Refer to
Table 5-1
charge cycle.
© 2009 Microchip Technology Inc.
MCP73123/223
SS
REG
DFN-10
DD
1, 2
3, 4
5, 6
8, 9
with a minimum of 1 µF to ensure loop stability
10
4
11
7
(Typical) + 0.3V] to 12.0V is recommended for
PIN DESCRIPTION
Battery Management Input Supply
(V
pin is rated 18V absolute maximum to prevent
Battery Charge Control Output
(V
No Connect (NC)
Status Output (STAT)
batteries. Undercharge may occur if a typical
for a summary of the status output during a
DD
BAT
)
)
PIN FUNCTION TABLES
Symbol
PROG
REG
STAT
V
V
V
NC
EP
BAT
DD
SS
SS
(Typical) + 0.3V] to 6.0V is
with a minimum of 1 µF.
I/O
I/O
I/O
—
O
-
-
I
Table
Battery Management Input Supply
Battery Charge Control Output
No Connection
Battery Charge Status Output
Battery Management 0V Reference
Battery Charge Current Regulation Program and Charge Control Enable
Exposed Pad
3-1.
3.5
Connect to the negative terminal of the battery and
input supply.
3.6
The fast charge current is set by placing a resistor from
PROG to V
PROG pin also serves as charge control enable.
When a typical 200 kΩ impedance is applied to PROG
pin, the MCP73123/223 is disabled until the high
impedance
“Constant Current MODE - Fast Charge” for details.
3.7
The Exposed Thermal Pad (EP) shall be connected to
the exposed copper area on the Printed Circuit Board
(PCB) for the thermal enhancement. Additional vias on
the copper area under the MCP73123/223 device can
improve the performance of heat dissipation and
simplify the assembly process.
Description
Battery Management 0V Reference
(V
Current Regulation Set (PROG)
Exposed Pad (EP)
SS
SS
is
during constant current (CC) mode.
)
MCP73123/223
removed.
Refer
DS22191A-page 13
to
Section 5.5