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MCP73864T-I/ML Datasheet

  • MCP73864T-I/ML

  • IC CONTROLLER LI-ION 8.4V 16QFN

  • 443.80KB

  • 28页

  • Microchip   Microchip

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MCP73861/2/3/4
3.0
PIN DESCRIPTION
PIN FUNCTION TABLES
Symbol
QFN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SOIC
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
V
SET
V
DD1
V
DD2
V
SS1
PROG
THREF
THERM
TIMER
V
SS3
V
BAT1
V
BAT2
V
BAT3
V
SS2
EN
STAT2
STAT1
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
Function
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin No.
3.1
Voltage Regulation Selection
(V
SET
)
3.7
3.8
Timer Set
Battery Charge Control Output
(V
BAT1
, V
BAT2
)
All safety timers are scaled by C
TIMER
/0.1 碌F.
MCP73861/3:
Connect V
SET
to V
SS
for 4.1V regulation
voltage, connect to V
DD
for 4.2V regulation voltage.
MCP73862/4:
Connect V
SET
to V
SS
for 8.2V regulation
voltage, connect to V
DD
for 8.4V regulation voltage.
3.2
Battery Management Input Supply
(V
DD2
, V
DD1
)
Connect to positive terminal of battery. Drain terminal
of internal P-channel MOSFET pass transistor. Bypass
to V
SS
with a minimum of 4.7 碌F to ensure loop stability
when the battery is disconnected.
A supply voltage of [V
REG
(typ.) + 0.3V] to 12V is
recommended. Bypass to V
SS
with a minimum of
4.7 碌F.
3.9
Battery Voltage Sense (V
BAT3
)
3.3
Battery Management 0V Reference
(V
SS1
, V
SS2
, V
SS3
)
V
BAT3
is a voltage sense input. Connect to positive
terminal of battery. A precision internal resistor divider
regulates the final voltage on this pin to V
REG
.
3.10
Logic Enable (EN)
Connect to negative terminal of battery and input
supply.
3.4
Current Regulation Set (PROG)
EN is an input to force charge termination, initiate
charge, clear faults or disable automatic recharge.
Preconditioning, fast and termination currents are
scaled by placing a resistor from PROG to V
SS
.
3.11
Fault Status Output (STAT2)
3.5
Cell Temperature Sensor Bias
(THREF)
STAT2 is a 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.
THREF is a voltage reference to bias external
thermistor for continuous cell temperature monitoring
and prequalification.
3.12
Charge Status Output (STAT1)
3.6
Cell Temperature Sensor Input
(THERM)
STAT1 is a 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.
THERM is an input for an external thermistor for contin-
uous cell-temperature monitoring and prequalification.
Connect to THREF/3 to disable temperature sensing.
DS21893C-page 12
漏
2005 Microchip Technology Inc.

MCP73864T-I/ML 产品属性

  • Microchip

  • 电池管理

  • Li-Ion, Li-Poly

  • 8.2 V, 8.4 V

  • 1200 mA

  • + 85 C

  • - 40 C

  • QFN

  • Reel

  • SMD/SMT

  • 3300

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