Datasheet
© 2009 Microchip Technology Inc. DS22190B-page 13
MCP73213
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLES
3.1 Battery Management Input Supply
(V
DD
)
A supply voltage of [V
REG
(Typical) + 0.3V] to 13.0V is
recommended. Bypass to V
SS
with a minimum of 1 µF.
The V
DD
pin is rated 18V absolute maximum to prevent
suddenly rise of input voltage from spikes or low cost
ac-dc wall adapter.
3.2 Battery Charge Control Output
(V
BAT
)
Connect to the positive terminal of the battery. Bypass
to V
SS
with a minimum of 1 µF to ensure loop stability
when the battery is disconnected.
3.3 No Connect (NC)
No connect.
3.4 Status Output (STAT)
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 for a summary of the status output during a
charge cycle.
3.5 Battery Management 0V Reference
(V
SS
)
Connect to the negative terminal of the battery and
input supply.
3.6 Current Regulation Set (PROG)
The fast charge current is set by placing a resistor from
PROG to V
SS
during constant current (CC) mode.
PROG pin also serves as charge control enable. When
a typical 200 kΩ impedance is applied to PROG pin,
the MCP73213 is disabled until the high-impedance is
removed. Refer to Section 5.5 “Constant Current
Mode - Fast Charge” for details.
3.7 Exposed Pad (EP)
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 MCP73213 device can
improve the performance of heat dissipation and
simplify the assembly process.
MCP73213
Symbol I/O Description
DFN-10
1, 2 V
DD
I Battery Management Input Supply
3, 4 V
BAT
I/O Battery Charge Control Output
5, 6 NC — No Connection
7 STAT O Battery Charge Status Output
8, 9 V
SS
— Battery Management 0V Reference
10 PROG I/O Battery Charge Current Regulation Program and Charge Control Enable
11 EP — Exposed Pad