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PDF MAX1665VESA Data sheet ( Hoja de datos )
| Número de pieza | MAX1665VESA | |
| Descripción | Lithium-Ion Battery Pack Protector | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1605; Rev 0; 1/00
Lithium-Ion Battery Pack Protector
General Description
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.
Applications
Lithium-Ion Battery Packs
____________________________Features
o Complete Protection Against:
Cell Overvoltage
Cell Undervoltage
o 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
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SO
8 SO
8 SO
CELL
COUNT
2
3
4
Typical Operating Circuit
(+)
B4P B3P
DSG B2P
MAX1665X
CHG B1P
BN
(-) PKN
TOP VIEW
Pin Configuration
I.C. (B4P) 1
DSG 2
CHG 3
PKN 4
MAX1665S
MAX1665V
MAX1665X
8 I.C. [B3P]
7 B2P
6 B1P
5 BN
SO
NOTES: I.C. = INTERNAL CONNECTION. MAKE NO CONNECTIONS TO THIS PIN.
( ) ARE FOR THE MAX1665X.
[ ] ARE FOR THE MAX1665V AND MAX1665X.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Lithium-Ion Battery Pack Protector
MAX1665S
1, 8
PIN
MAX1665V
1
MAX1665X
—
——
1
222
333
444
555
666
777
—8
8
NAME
I.C.
B4P
DSG
CHG
PKN
BN
B1P
B2P
B3P
Pin Description
FUNCTION
Internally Connected. Make no connection to this pin.
Cell 4 Positive Input. Connect to the positive terminal of the fourth
series Li+ cell.
Discharge Control Output. Drives the gate of an external N-channel
MOSFET to control the discharge path.
Charge Control Output. Drives the gate of an external N-channel
MOSFET to control the charge path.
Pack Negative Input
Connect to the negative terminal of the first series Li+ cell.
Cell 1 Positive Input. Connect to the positive terminal of the first
series Li+ cell.
Cell 2 Positive Input. Connect to the positive terminal of the second
series Li+ cell.
Cell 3 Positive Input. Connect to the positive terminal of the third
series Li+ cell.
Table 1. Functionality Truth Table for VBN < VPKN + 0.018V (Discharge Mode)
CHARGE
DISCHARGE
OVERCURRENT OVERCURRENT
OVERVOLTAGE
UNDERVOLTAGE
CHG
DSG
GATE
CLOCKED
MAX
SUPPLY
CURRENT*
(µA)
00
0
0
High
High
No
25
00
0
1
Low Low
No
1
00
1
0
Low High
No
25
00
1
1
Low Low
No
1
01
0
0
Gated Gated
Yes
25
01
0
1
Low Low
No
1
01
01
1
1
0
Low Gated
Yes
25
1
Low Low
No
1
*Assuming no load on CHG or DSG.
_______________________________________________________________________________________ 5
5 Page 
Lithium-Ion Battery Pack Protector
NOTES
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX1665VESA.PDF ] | |
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