MAX6684 Maxim, MAX6684 Datasheet
MAX6684
Manufacturer Part Number
MAX6684
Description
Fan-Failure Detector with Integrated Power Switch
Manufacturer
Maxim
Datasheet
1.MAX6684.pdf
(7 pages)
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Part Number:
MAX6684ESA
Manufacturer:
MAXIM/美信
Quantity:
20 000
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MAX6684ESA+
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Part Number:
MAX6684ESA+T
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20 000
The MAX6684 is an integrated fan-failure detector that
detects when a fan exhibits excessive underspeed or a
locked rotor. This device is especially well suited for criti-
cal systems where no fan control, or simple on/off control
is desired. The MAX6684 detects fan failure by evaluat-
ing fluctuations in current at the low side of the fan; no
tachometer signal is necessary. The output of the device,
FAIL, is an active-low, open-drain alarm. The MAX6684
can also be used to switch the fan on or off, based on
the state of a logic-level input, OFF. This device can be
used with fans rated at up to 24V and 250mA. The
MAX6684 is available in an 8-pin SO package, and is
specified for operation from -40°C to +85°C.
19-2306; Rev 0; 1/02
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.
Desktop PCs
Notebooks
Networking Equipment
Telecommunications
Industrial Applications
1µF
Typical Operating Circuit
0.1µF
________________________________________________________________ Maxim Integrated Products
OFF
FC+
FC-
GND
General Description
MAX6684
3.3V
V
Fan-Failure Detector with Integrated
CC
SENSE
PGND
FAIL
Applications
10kΩ
12V
0.1µF
o Dedicated Fan-Failure Detector
o Works with Ordinary 2-Wire Fans
o No Fan Tachometer Output Required
o No Software Development Required
o No Analog Circuit Design Required
o Logic-Level Fan Driver Control
o Works with Fans Rated Up to 24V/250mA
MAX6684ESA
TOP VIEW
PART
SENSE
GND
FAIL
FC-
1
2
4
3
-40°C to +85°C
TEMP RANGE
Ordering Information
Power Switch
MAX6684
SO
Pin Configuration
6
8
7
5
PGND
OFF
V
FC+
PIN-PACKAGE
8 SO
CC
Features
1
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