Microchip MIC502 Bruksanvisning
Microchip
ej kategoriserat
MIC502
Läs nedan 📖 manual på svenska för Microchip MIC502 (16 sidor) i kategorin ej kategoriserat. Denna guide var användbar för 3 personer och betygsatt med 3.6 stjärnor i genomsnitt av 2 användare
Sida 1/16
MIC502
Fan Management IC
Micrel Inc. • 2180 Fortune Drive • Jose, CA 95131 • USA • tel +1 (408) 944 0800 • fax + 1 (408) 474 1000 • San - - http://www.micrel.com
October
6 , 2014
Revision 3.0
General Description
The MIC502 is a thermal and fan management IC that
supports the features for NLX/ATX power supplies and
other control applications.
Fan speed is determined by an external temperature
sensor, typically a thermistor resistor divider, and -
(optionally) a second signal, such as the NLX “FanC”
signal. The MIC502 produces a low frequency pulse- -width
modulated output for driving an external motor drive
transistor. Low uency PWM speed control allows -freq
operation of standard brushless DC fans at low duty-cycle
for reduced acoustic noise and permits the use of a very
small power transistor. The PWM time base is determined
by an external capacitor.
An open collector overtemperature fault output is asserted -
if the primary control input is driven above the normal
control range.
The MIC502 features a low power sleep mode with a user- -
determined threshold. Sleep mode completely turns off the
fan and occurs when the system is asleep or off (both
control inputs very low). A complete shutdown or reset can
also be initiated by external circuitry as desired.
The MIC502 is available as 8-pin plastic DIP and SOIC
packages in the 40°C to +85°C industrial temperature –
range.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com
.
Features
• - Temperature proportional fan speed control
• - Low cost, efficient PWM fan drive
• 4.5V to 13.2V IC supply range
• Controls any voltage fan
• Overtemperature detection with fault output
• Integrated fan startup timer
• - Automatic user specified sleep mode
• - Supports low cost NTC/PTC thermistors
• 8- pin DIP and SOIC packages
Applications
• NLX and ATX power supplies
• Personal computers
• File servers
• Telecom and networking hardware
• Printers, copiers, and office equipment
• Instrumentation
• Uninterruptible power supplies
• Power amplifiers
Typical Application
Micrel, Inc.
MIC502
October
6 2 , 2014
Revision 3.0
Ordering Information
Part Number Temperature Range Package Lead Finish
MIC502YN –40° to +85°C 8- Pb-Free Pin Plastic DIP
MIC502YM –40° to +85°C 8- Pb-Free Pin SOIC
Pin Conguration
8- Pin SOIC (M)
8- Pin DIP (N)
(Top View)
Pin Description
Pin Number Pin Name Pin Function
1 VT1
Thermistor 1 (input): Analog input of approximately 30% to 70% of V
DD
produces active duty cycle
of 0% to 100% at driver output (OUT). Connect to external thermistor network (or other
temperature sensor). Pull low for shutdown.
2 CF
PWM timing capacitor (external component): Positive terminal for the PWM triangle-wave
generator timing capacitor. The recommended CF is 0.1µF for 30Hz PWM operation.
3 VSLP
Sleep threshold (input): The voltage on this pin is compared to VT1 and VT2. When V
T1
< V
SLP
and V
T2
< V
SLP
the MIC502 enters sleep mode until V
T1
Vor
T2
rises above V
WAKE
. (V
WAKE
= V
SLP
+
V
HYST
). Grounding V
SLP
disables the sleep mode function.-
4 GND Ground
5 VT2
Thermistor 2 (input): Analog input of approximately 30% to 70% of V
DD
produces active duty cycle
of 0% to 100% at driver output (OUT). Connect to motherboard fan control signal or second
temperature sensor.
6 /OTF
Overtemperature fault (output): -Open collector output (active Indicates overtemperature - low).
fault condition (V
T1
> V
OT
) when active.
7 OUT
Driver output: Asymmetrical-drive active high complimentary PWM - output. Typically connect to
base of external NPN motor control transistor.
8 VDD Power supply (input): IC supply input; may be independent of fan power supply.
Micrel, Inc.
MIC502
October
6 3 , 2014
Revision 3.0
Absolute Maximum Ratings
( )1
Supply Voltage (V
DD
) .................................................... + V 14
Output Sink Current (I
OUT(sink)
). .................................... 10mA
Output Source Current (I
OUT(source)
) .............................. 25mA
Input Voltage (any pin) ......................... –0.3V to V
DD
+ 0.3V
Junction Temperature (T
J
) ....................................... +125°C
Lead Temperature (soldering, 5s) .............................. 260°C
Storage Temperature (Ts) ......................... – 65°C to +150°C
ESD Rating
( )3
................................................. ESD Sensitive
Operating Ratings
( )2
Supply Voltage (V
DD
) .................................. +4.0V to +13.2V
Sleep Voltage (V
SLP
) .......................................... GND to V
DD
Temperature Range (T
A
) ............................. – 40°C to +85°C
Power Dissipation at +25°C
SOIC .................................................................. 800mW
DIP..................................................................... 740mW
Derating Factors
SOIC .............................................................. 8.3mW/°C
Plastic DIP ..................................................... 7.7mW/°C
Electrical Characteristics
( )4
4.5V ≤ V
DD
≤13.2V
( )5
; T
A
= 25°C, bold –values indicate 40°C≤ T
A
≤ +85°C, unless noted.
Symbol Parameter . . . Condition Min Typ Max Units
I
DD
Supply Current, Operating
V
SLP
/= GND, OTF, OUT = open,
C
F
= 0.1µF, V
T1
= V
T2
= 0.7 V
DD
1.5 mA
I
DD(slp)
Supply Current, Sleep
V
T1
= GND, V
SLP
, /OTF, OUT = open,
C
F
= 0.1µF
µA 500
Driver Output
t
R
Output Rise Time, Note 6 I
OH
µs = 10mA 50
t
F
Output Fall Time, Note 6 I
OL
µs = 1mA 50
I
OL
Output Sink Current V
OL
= 0.5V
0.9
mA
I
OH
Output Source Current
4.5V ≤ V
DD
≤5.5V, V
OH
= 2.4V
10
mA
10.8V ≤ V
DD
≤13.2V, V
OH
= 3.2V
10
mA
I
OS
Sleep Mode Output Leakage V
OUT
1 µA = 0V
Thermistor and Sleep Inputs
V
PWM(max)
100% PWM Duty Cycle Input
Voltage
67
70
73
%V
DD
V
PWM(span)
V
PWM(max)
– V
PWM(min)
37
40
43
%V
DD
V
HYST
Sleep Comparator Hysteresis
8
11
14
%V
DD
V
IL
VT1 Shutdown Threshold
0.7
V
V
IH
VT1 Startup Threshold
1.1
V
V
OT
VT1 Overtemperature Fault
Threshold
Note 7
74
77
80
%V
DD
I
VT
, I
VSLP
VT1, VT2, VSLP Input Current -2.5 1 µA
t
RESET
Reset Setup Time
Minimum time V
T1
< V
IL
to guarantee reset.
Note 6
30
µs
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5k in series with 100pF.Ω
4. Specification for packaged product only.
5. Part is functional over this V
DD
Vrange. However, it is characterized for operation at 4.5V ≤
DD
V≤5.5V and 10.8V ≤
DD
≤13.2V ranges. These ranges
correspond to a nominal V
DD
of 5V and 12V, respectively.
6. Guaranteed by design.
7. V
OT
is guaranteed by design to always be higher than V
PWM(max)
.
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | ej kategoriserat |
| Modell: | MIC502 |
Behöver du hjälp?
Om du behöver hjälp med Microchip MIC502 ställ en fråga nedan och andra användare kommer att svara dig
ej kategoriserat Microchip Manualer
7 Juni 2025
31 Maj 2025
31 Maj 2025
ej kategoriserat Manualer
- ej kategoriserat Asrock
- ej kategoriserat Rusta
- ej kategoriserat LaCie
- ej kategoriserat Vulcan
- ej kategoriserat Clarion
- ej kategoriserat RCA
- ej kategoriserat Hansgrohe
- ej kategoriserat Jung
- ej kategoriserat Point
- ej kategoriserat Werkstein
- ej kategoriserat Maytronics
- ej kategoriserat Digitus
- ej kategoriserat Marklin
- ej kategoriserat Leviton
- ej kategoriserat Garmin
Nyaste ej kategoriserat Manualer
7 Juni 2025
7 Juni 2025
7 Juni 2025
7 Juni 2025
6 Juni 2025
6 Juni 2025
6 Juni 2025
6 Juni 2025
6 Juni 2025