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MAX1906 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX1906
Description  Li Battery-Pack Protector with Integrated Fuse Driver
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1906 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX1906 protects against overvoltage conditions
in lithium-ion/lithium polymer (Li+) battery packs by
blowing a three-terminal protection fuse. The IC should
be used in conjunction with resettable protection cir-
cuits to provide a high level of safety against over-
charging Li+ batteries. It can be used with 2-, 3-, or
4-series cell battery packs.
The MAX1906 monitors individual cell voltages. If any
cell voltage exceeds the overvoltage threshold for
greater than 2.1s, the MAX1906 activates an internal
SCR. The SCR sinks sufficient current to blow an exter-
nal protection fuse, permanently disabling the battery
pack. Alternatively, the IC can drive the gate of an
external MOSFET to blow the fuse.
The MAX1906 also offers protection against disconnect-
ed voltage sense pins. If a disconnected pin is detected,
the DISCON output is forced low. The MAX1906 includes
a test mode, which determines if the circuit is operating
correctly while in an assembled battery pack.
The low-cost MAX1906 is available in a thermally
enhanced 16-pin QFN package.
Applications
2-, 3-, or 4-Series Li+ Battery Packs for
Portable Products
Features
o Protects Against Overvoltage
o ±1% Accurate Protection Thresholds
o Integrated 2.1s Fault-Delay Timer
o Built-in 1.5A SCR Fuse Driver
o Test Mode for Functional Verification in
Assembled Pack
o 8µA (max) Supply Current
o 1µA (max) Standby Current
o Protects Against Disconnected B1P–B4P Pins
o Protects 2-, 3-, or 4-Series Li+ Battery Packs
o Available in Small 16-Pin QFN Package
(5mm x 5mm)
Li+ Battery-Pack Protector with
Integrated Fuse Driver
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
MAX1906X
OPTIONAL
PACK
CONTROLLER
VCC
FUSE
PACK+
PACK-
7
4
2
3
5
16
14
12
10
8
B4P
B3P
B2P
B1P
BN
OUT
DISCON
DRV
TEST
PKN
Minimal Operating Circuit
19-2455; Rev 0; 4/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE PIN-PACKAGE
CELLS
MAX1906SEGE
-40°C to +85°C 16 QFN 5mm
5mm
2
MAX1906VEGE
-40°C to +85°C 16 QFN 5mm
5mm
3
MAX1906XEGE
-40°C to +85°C 16 QFN 5mm
5mm
4
MAX1906S/V/X
16
15
14
13
567
8
12
11
10
9
1
2
3
4
I.C.
DRV
5mm x 5mm QFN
TEST
DISCON
B2P
N.C.
B1P
I.C.
[]:MAX1906V, MAX1906X
():MAX1906X
Pin Configuration


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