MAX1665VESA Maxim Integrated Products, MAX1665VESA Datasheet

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MAX1665VESA

Manufacturer Part Number
MAX1665VESA
Description
Lithium-ion battery pack protector. Cell count 3
Manufacturer
Maxim Integrated Products
Datasheet

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MAX1665VESA+T
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1 000
The MAX1665 provides protection against overvoltage,
undervoltage, overcharge current, and overdischarge
current for 2-cell to 4-cell lithium-ion (Li+) battery packs.
Very low operating current ensures that cells are not
overdischarged during long storage periods.
The MAX1665 controls two external N-channel MOSFETs
to limit the charge and discharge voltages. Charging is
allowed when the per-cell voltage is below +4.3V. When
the voltage on any cell rises above +4.3V (overvoltage
limit), the MAX1665 turns off the charge MOSFET. This
safety feature prevents overcharge of any cell within the
battery pack.
Discharge is allowed when the per-cell voltage is above
+2.5V (undervoltage limit). If the voltage across any cell
falls below +2.5V, the MAX1665 turns off the discharge
MOSFET. This safety feature prevents overdischarge of
any cell within the battery pack.
Charging and discharging are allowed if the voltage
between PKN and BN is less than 250mV. This safety fea-
ture prevents excessive pack current.
19-1605; Rev 0; 1/00
For free samples and the latest literature visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Lithium-Ion Battery Packs
(+)
(-)
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
B4P
DSG
CHG
PKN
General Description
MAX1665X
Lithium-Ion Battery Pack Protector
Applications
B3P
B2P
B1P
BN
o Complete Protection Against:
o Pack Protection for Excessive Charge and
o Very Low Supply Current: 16µA typ
o Low Standby Current: 1µA max
o Matched Cell Input Bias Current (<500pA)
____________________________Features
MAX1665SESA
MAX1665VESA
MAX1665XESA
Discharge
Preserves Cell Balance
TOP VIEW
( ) ARE FOR THE MAX1665X.
[ ] ARE FOR THE MAX1665V AND MAX1665X.
NOTES: I.C. = INTERNAL CONNECTION. MAKE NO CONNECTIONS TO THIS PIN.
Cell Overvoltage
Cell Undervoltage
PART
I.C. (B4P)
DSG
CHG
PKN
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
1
2
4
3
Ordering Information
MAX1665S
MAX1665V
MAX1665X
SO
Pin Configuration
PACKAGE
6
8
7
5
8 SO
8 SO
8 SO
PIN-
I.C. [B3P]
B2P
B1P
BN
COUNT
CELL
2
3
4
1

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MAX1665VESA Summary of contents

Page 1

... Pack Protection for Excessive Charge and Discharge o Very Low Supply Current: 16µA typ o Low Standby Current: 1µA max o Matched Cell Input Bias Current (<500pA) Preserves Cell Balance PART MAX1665SESA MAX1665VESA MAX1665XESA Applications TOP VIEW B3P B2P B1P BN NOTES: I.C. = INTERNAL CONNECTION. MAKE NO CONNECTIONS TO THIS PIN. ...

Page 2

... OUT B4P V = 100mV -100µA CHG I = -1µA DSG CHG = PKN, DSG = 3.0V CHG PKN 3.0V DSG ±300mV PKN V = ±300mV PKN MAX1665SESA B1P MAX1665VESA 4V B1P B2P MAX1665XESA 4V 8V, B1P B2P V = 12V B3P = +70°C) A MIN TYP MAX UNITS 4.26 4.3 4.34 V ...

Page 3

... CHG I = -1µA DSG CHG = PKN, DSG = 0.3V OL CHG PKN 0.3V OL DSG BN MAX1665SESA B1P MAX1665VESA 4V, V B1P B2P MAX1665XESA 4V, V B1P B2P V = 12V B3P CC I (Note 5) LP DSG = CHG = low = 0°C to +85°C, unless otherwise noted. Typical A MIN TYP MAX ±500 16 0 ...

Page 4

Lithium-Ion Battery Pack Protector (T = +25°C, unless otherwise noted.) A OVERVOLTAGE THRESHOLD vs. TEMPERATURE 4.34 4.30 4.26 HYSTERESIS 4.22 4. PKN 4.14 -40 - TEMPERATURE (°C) OVERDISCHARGE THRESHOLD vs. TEMPERATURE -240 -242 ...

Page 5

Lithium-Ion Battery Pack Protector PIN MAX1665S MAX1665V MAX1665X — — — — Table 1. Functionality Truth ...

Page 6

Lithium-Ion Battery Pack Protector Table 2. Functionality Truth Table for V CHARGE DISCHARGE OVERCURRENT OVERCURRENT *Assuming no load on CHG or DSG. SLEEP POWER ...

Page 7

Lithium-Ion Battery Pack Protector across each cell to determine if the voltage levels are within operating range. As depicted in the typical operating circuit, when CHG and DSG are high, the MOSFETs are on, allowing the cells to charge or ...

Page 8

Lithium-Ion Battery Pack Protector BP4 BP3 BP2 B2P1 ...

Page 9

Lithium-Ion Battery Pack Protector 1 I.C. 8 PACK+ B3P CELL 3 7 B2P CELL 2 6 B1P CELL IRF7101 2 OVERDISCHARGE DSG PROTECTION IRF7101 OVERCHARGE 3 CHG PROTECTION 4 PACK- PKN Figure 4. Typical 3-Cell Operating Circuit ...

Page 10

Lithium-Ion Battery Pack Protector ________________________________________________________Package Information 10 ______________________________________________________________________________________ ...

Page 11

Lithium-Ion Battery Pack Protector ______________________________________________________________________________________ NOTES 11 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products ...

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