MAX1666S Datasheet, PDF (7/16 Pages) Maxim Integrated Products – Advanced Lithium-Ion Battery-Pack Protector

MAX1666X
PIN
MAX1666V
MAX1666S
1
1
1
2
2
2
3
3
3
4
4
4
5
—
—
6
5, 6
—
7
7
5
8
8
6
9
9
7
10
10
8
11
11
9
12
12
10
13
13
11
14
14
—
15
15
12
16
16
13
17
17
14
18
18
15
19
19
16
20
20
—
NAME
SRC
DSO
TKO
CGO
B4P
B3P
B2P
B1P
GND
PKN
DSI
CGI
PKF
WRN
MMA
UVA
OVA
REF
V_CC
UVO
Advanced Lithium-Ion
Battery-Pack Protector
Pin Description
FUNCTION
Charge Source Input. Provides current for gate drivers DSO, TKO,
CGO, and UVO.
Discharge Driver Output. Drives external P-channel MOSFET to con-
trol discharge.
Trickle-Charge Driver Output. Drives external P-channel MOSFET to
control trickle-charge current. Internally grounded when inactive.
Fast-Charge Driver Output. Drives external P-channel MOSFET to
control fast charge.
Cell 4 Positive Input. Power supply input for MAX1666X.
Cell 3 Positive Input. Power supply input for MAX1666V.
Cell 2 Positive Input. Power supply input for MAX1666S.
Cell 1 Positive Input
Ground
Battery Pack Negative Terminal. Connect to bottom of current sense
resistor. Ground reference for logic inputs DSI and CGI.
Discharge Control Input
Charge Control Input
Pack Fail Output. PKF goes low when any cell voltage exceeds the
mismatch threshold or when a shorted cell is detected.
Undervoltage/Overvoltage Warning Output
Mismatch Adjust Input. Set the mismatch threshold by a resistor-
divider from REF to GND.
Undervoltage Adjust Input. Set the undervoltage threshold with a
resistor-divider from REF to GND.
Overvoltage Adjust Input. Set the overvoltage threshold with a
resistor-divider from REF to GND.
Reference Voltage Output. Minimize PCB stray capacitance on this
node.
3.3V Linear Regulator Output. Bypass with a 0.47µF min capacitor
to GND.
Undervoltage Fault Output
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