MCP73853(2004) 데이터 시트보기 (PDF) - Microchip Technology
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MCP73853
(Rev.:2004)
(Rev.:2004)
Microchip Technology
MCP73853 Datasheet PDF : 24 Pages
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MCP73853/55
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
MCP73853
MCP73855
Sym
1
2
VSET
2
3
VDD1
3
—
VDD2
4
4
VSS1
5
5
PROG
6
—
THREF
7
—
THERM
8
6
TIMER
9
—
VSS3
10
8
VBAT1
11
9
VBAT2
12
—
VBAT3
13
7
VSS2
14
10
EN
15
—
STAT2
16
1
STAT1
Description
Voltage Regulation Selection
Battery Management Input Supply
Battery Management Input Supply
Battery Management 0V Reference
Current Regulation Set
Cell Temperature Sensor Bias
Cell Temperature Sensor Input
Timer Set
Battery Management 0V Reference
Battery Charge Control Output
Battery Charge Control Output
Battery Voltage Sense
Battery Management 0V Reference
Logic Enable
Fault Status Output
Charge Status Output
3.1 Voltage Regulation Selection
(VSET)
Connect to VSS for 4.1V regulation voltage. Connect to
VDD for 4.2V regulation voltage.
3.2 Battery Management Input Supply
(VDD1, VDD2)
A supply voltage of [VREG(Typ) + 0.3V] to 5.5V is
recommended. Bypass to VSS with a minimum of
4.7 µF.
3.3 Battery Management 0V Reference
(VSS1, VSS2, VSS3)
Connect to negative terminal of battery.
3.4 Current Regulation Set (PROG)
Preconditioning, fast and termination currents are
scaled by placing a resistor from PROG to VSS.
3.5 Cell Temperature Sensor Bias
(THREF)
THREF is a voltage reference to bias external
thermistor for continuous cell temperature monitoring
and pre-qualification.
3.6 Cell Temperature Sensor Input
(THERM)
Input for an external thermistor for continuous cell-
temperature monitoring and prequalification. Connect
to THREF/3 to disable temperature sensing.
3.7 Timer Set (TIMER)
All safety timers are scaled by CTIMER/0.1 µF.
3.8 Battery Charge Control Output
(VBAT1, VBAT2)
Connect to positive terminal of battery. Drain terminal
of internal P-channel MOSFET pass transistor. Bypass
to VSS with a minimum of 4.7 µF to ensure loop stability
when the battery is disconnected.
3.9 Battery Voltage Sense (VBAT3)
Voltage sense input. Connect to positive terminal of
battery. A precision internal resistor divider regulates
the final voltage on this pin to VREG.
3.10 Logic Enable (EN)
Input to force charge termination, initiate charge, clear
faults or disable automatic recharge.
3.11 Fault Status Output (STAT2)
Current-limited, open-drain drive for direct connection
to a LED for charge status indication. Alternatively, a
pull-up resistor can be applied for interfacing to a host
microcontroller.
3.12 Charge Status Output (STAT1)
Current-limited, open-drain drive for direct connection
to a LED for charge status indication. Alternatively, a
pull-up resistor can be applied for interfacing to a host
microcontroller.
DS21915A-page 10
2004 Microchip Technology Inc.
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