MIC502YM Micrel Inc, MIC502YM Datasheet

MIC502YM

Manufacturer Part Number

MIC502YM

Description

IC MANAGEMENT FAN/THERMAL 8SOIC

Manufacturer

Micrel Inc

Datasheet

1.MIC502YM.pdf (15 pages)

Specifications of MIC502YM

Applications

Fan Controller

Number Of Outputs

Current - Output

10mA

Voltage - Supply

4 V ~ 13.2 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

No. Of Outputs

Output Current

10mA

Supply Voltage Range

4.5V To 13.2V

Driver Case Style

SOIC

No. Of Pins

Operating Temperature Range

-40Â°C To +85Â°C

Svhc

No SVHC (15-Dec-2010)

Operating

RoHS Compliant

Operating Current

1.5mA

Operating Temperature Classification

Industrial

Package Type

SOIC

Operating Supply Voltage (min)

Operating Supply Voltage (max)

13.2V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Load

Lead Free Status / RoHS Status

Compliant, Lead free / RoHS Compliant

Other names

576-1241

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC502YM

Manufacturer:

MICREL

Quantity:

2 100

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC502YM

Manufacturer:

MICREL

Quantity:

Current page: 1 of 15
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General Description

The MIC502 is a thermal and fan management IC which

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 (option-

ally) 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-

frequency PWM speed control allows 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.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

___________________________________________________________________________________________________________

Typical Application

November 2006

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

Fan-contro

Secondary

Input

R 3

R 4

R 2

R 1

VT1

C F

V S L P

GND

MIC502

VDD

OUT

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

OT F

VT2

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

12V

B A S E

Overtemperature

Fault Output

Fan Management IC

Fan

MIC502

M9999-112206

Related parts for MIC502YM

MIC502YM Summary of contents

Page 1

... Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. ___________________________________________________________________________________________________________ Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( November 2006 Features • Temperature-proportional fan speed control • Low-cost, efficient PWM fan drive • ...

Page 2

... Micrel, Inc. Ordering Information Part Number MIC502BN MIC502YN MIC502BM MIC502YM Pin Configuration Pin Description Pin Number Pin Name 1 VT1 VSLP 4 GND 5 VT2 6 /OTF 7 OUT 8 VDD November 2006 Temperature Range Package –40° to +85°C 8-Pin Plastic DIP –40° to +85°C 8-Pin Plastic DIP – ...

Page 3

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V )....................................................+14V DD Output Sink Current (I ) .....................................10mA OUT(sink) Output Source Current (I OUT(source) Input Voltage (any pin) .......................... –0. Junction Temperature (T ) ....................................... +125°C J Lead Temperature (soldering, ...

Page 4

Micrel, Inc. Symbol Parameter Overtemperature Fault Output V Active (Low) Output Voltage OL I Off-State Leakage OH Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. ...

Page 5

Micrel, Inc 0. 0.3V 0. OTF ...

Page 6

Micrel, Inc. Typical Characteristics Supply Current vs. Temperature 0.9 0 12V DD 0.7 0.6 0 0.4 DD 0.3 0.2 0.1 0 -40 - 100 TEMPERATURE ( °C) V vs. OH ...

Page 7

Micrel, Inc. Typical Characteristics (cont.) V PWM(max) vs. Temperature =12V -40 - 100 TEMPERATURE ( °C) November 2006 PWM ...

Page 8

Micrel, Inc. Functional Diagram VT2 5 VT1 VDD 8 November 2006 PWM Start-Up Timer Oscillator Sleep Power-On Reset Reset V IL Overtemperature 4 GND ...

Page 9

Micrel, Inc. Functional Description Oscillator A capacitor connected to CF determines the frequency of the internal time base which drives the state-machine logic and determines the PWM frequency. This operating frequency will be typically 30Hz to 60Hz. (C 30Hz.) Pulse-Width ...

Page 10

Micrel, Inc. Normal Operation Normal operation consists of the PWM operating to control the speed of the fan according to V Exceptions to this otherwise indefinite behavior can be caused by any of three conditions overtemperature condition; V ...

Page 11

Micrel, Inc. Application Information The Typical Application drawing on page 1 illustrates a typical application circuit for the MIC502. Interfacing the MIC502 with a system consists of the following steps: 1. Selecting a temperature sensor 2. Interfacing the temperature sensor ...

Page 12

Micrel, Inc. Design Example The thermistor-resistor interface network is shown in the Typical Application drawing. The following example describes the design process: A thermistor datasheet specifies a thermistor that is a candidate for this design as having an R25 resistance ...

Page 13

Micrel, Inc. incorporated into the design then the operating voltage ( vs 12V) becomes a concern. The FanC DD DD signal is derived from a 12V supply and is specified to swing at least to 10.5V. ...

Page 14

Micrel, Inc. Package Information 0.026 (0.65) MAX) 0.157 (3.99) 0.150 (3.81) 0.050 (1.27) 0.064 (1.63) 0.045 (1.14) 0.018 (0.57) 0.100 (2.54) November 2006 PIN 1 DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) TYP 0.0098 (0.249) 0.0040 (0.102) 0–8 0.197 (5.0) ...

Page 15

Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...

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