TC652/TC653 Integrated Temperature Sensor & Brushless DC Fan Controller with FanSense™ Detect & Over-Temperature Features Package Type • Integrated Temperature Sensing and Multi-speed MSOP Fan Control • FanSense™ Fan Fault Detect Circuitry VDD 1 8 PWM • Built-in Over-Temperature Alert (TOVER) FAULT 2 TC652 7 GND • Temperature Proportional Fan Speed Control for TC653 Acoustic Noise Reduction and Longer Fan Life SHDN 3 6 TOVER • Pulse Width Modulation Output Drive for Cost GND 4 5 SENSE and Power Savings • Solid-State Temperature Sensing General Description • ±1°C (Typical) Accuracy from 25°C to +70°C The TC652/TC653 are integrated temperature sensors • 2.8V – 5.5V Operating Range and brushless DC fan speed controllers with • TC653 includes Auto Fan Shutdown FanSense™ technology. The TC652/TC653 measure • Low Operating Current: 50A (Typical) their junction temperature and control the speed of the fan based on that temperature, making them especially Applications suited for applications in modern electronic equipment. • Thermal Protection For Personal Computers The FanSense™ Fan Fault detect circuitry eliminates the need for a more expensive 3-wire fan. • Digital Set-Top Boxes • Notebook Computers Temperature data is converted from the on-chip thermal sensing element and translated into a • Data Communications fractional fan speed from 40% to 100%. A temperature • Power Supplies selection guide in the data sheet is used to choose the • Projectors low and high temperature limits to control the fan. The TC652/TC653 also include a single trip point over Related Literature temperature alert (T ) that eliminates the need for OVER additional temperature sensors. In addition, the TC653 • Application Note: AN771 includes an auto fan shutdown function for additional Device Selection Table power savings. The TC652/TC653 are easy to use, require no software Part Number Package Temperature Range overhead and are therefore the ideal choice for implementing thermal management in a variety of TC652XXVUA 8-Pin MSOP -40C to +125C systems. TC653XXVUA 8-Pin MSOP -40C to +125C X Temperature A 25 B 30 C 35 D 40 E 45 F 50 G 55 The "X" denotes a suffix for temperature threshold settings. Contact factory for other temperature ranges.  2002-2012 Microchip Technology Inc. DS21452C-page 1

TC652/TC653 Typical Application Diagram +12V DC Fan TC652 +5V VDD 300mA TC653 Max. 1k 1 VDD PWM 8 2 FAULT GND 7 3 SHDN TOVER 6 FanSense™ 0.01µF 4 GND SENSE 5 CSENSE GND RSENSE Over-Temp 2Ω SHDN Control Alert Fan Fault Alert µController DS21452C-page 2  2002-2012 Microchip Technology Inc.

TC652/TC653 1.0 ELECTRICAL *Stresses above those listed under "Absolute Maximum Rat- ings" may cause permanent damage to the device. These are CHARACTERISTICS stress ratings only and functional operation of the device at these or any other conditions above those indicated in the Absolute Maximum Ratings* operation sections of the specifications is not implied. Expo- sure to Absolute Maximum Rating conditions for extended Input Voltage (V to GND)...................................+6V DD periods may affect device reliability. Output Voltage (OUT to GND).................................6V Voltage On Any Pin.......(GND – 0.3V) to (V + 0.3V) DD Package Thermal Resistance ( )...........250°C/W JA Operating Temperature Range .........-40°C to +125°C Storage Temperature.........................-65°C to +150°C TC652/TC653 ELECTRICAL SPECIFICATIONS Electrical Characteristics: V = 2.8V to 5.5V, SHDN = V , T = -40C to 125C unless otherwise specified. DD DD A Symbol Parameter Min Typ. Max Units Test Conditions V Supply Voltage 2.8 — 5.5 V DD I Supply Current — 50 90 A PWM, FAULT, T are DD OVER open SHDN Input V SHDN Input High Threshold 65 — — %V IH DD V SHDN Input Low Threshold — — 15 %V IL DD PWM Output V PWM Output Low Voltage — — 0.3 V I = 1mA OL SINK V PWM Output High Voltage V – 0.5 — — V I = 5mA OH DD SOURCE t PWM Rise Time — 10 — sec I = 5mA, 1nF from R OH PWM to GND t PWM Fall Time — 10 — sec I = 1mA, 1nF from F OL PWM to GND f PWM Frequency 10 15 — Hz OUT t Start-up Time — 32/f — sec V Rises from GND, STARTUP OUT DD or SHDN Released V Sense Input — 70 — mV Sense Input Threshold TH (SENSE) Voltage with Repect to Ground Temperature Accuracy T High Temperature Accuracy T - 3 T T + 3 C Note 1 H ACC H H H (T T ) Temp. Range Accuracy -1.0 — +1.0 C (T – T )  20C H – L ACC H L -2.5 — +2.5 C (T – T ) 20C H L T Auto-shutdown Hysteresis — (T – T )/5 — C TC653 Only HYST H L FAULT Output V FAULT Output High Voltage V – 0.5 — — V I = 1.2mA HIGH DD SOURCE V FAULT Output Low Voltage — — 0.4 V I = 2.5mA LOW SINK tmp Missing Pulse Detector — — 32/f Sec OUT Time-out T Output OVER V T Output High Voltage V – 0.5 — — V I = 1.2mA HIGH OVER DD SOURCE V T Output Low Voltage — — 0.4 V I = 2.5mA LOW OVER SINK T Absolute Accuracy — T + 10 — °C At Trip Point OVERACC H T Trip Point Hysteresis — 5 — °C OVER HYST Note 1: Transition from 90% to 100% Duty Cycle.  2002-2012 Microchip Technology Inc. DS21452C-page 3

TC652/TC653 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. Symbol Description (8-Pin MSOP) 1 V Power Supply Input. May be independent of fan power supply. DD 2 FAULT Fan Fault Alert, Active-Low Output. FAULT goes low to indicate a fan FAULT condition. When FAULT occurs, the device is latched in Shutdown mode with PWM low. Toggling the SHDN pin or cycling the V will release the part and fan from shutdown. FAULT will DD unconditionally remain high during shutdown. 3 SHDN Fan Shutdown, Active-Low Input. During Shutdown mode the chip still monitors temperature and T is low if temperature rises above factory set point. OVER 4 GND Ground return for all TC652/TC653 functions. 5 SENSE Detect Fan Pulses Input. Pulses are detected at this pin as fan rotation chops the current through the sense resistor, R . The absence of pulses indicates a Fan Fault. SENSE 6 T Over-Temperature Alert, Active-Low Output. OVER 7 GND Ground. 8 PWM PWM Fan Drive Output. Pulse width modulated rail-to-rail logic output. Nominal Frequency is 15Hz. DS21452C-page 4  2002-2012 Microchip Technology Inc.

TC652/TC653 3.0 DETAILED DESCRIPTION TABLE 3-2: TEMPERATURE RANGE DEFINITION FOR TC653 The TC652/TC653 acquire and convert their junction (AUTO-SHUTDOWN MODE) temperature (T ) information from an on-chip solid J state sensor with a typical accuracy of ±1°C. The Temperature temperature data is digitally stored in an internal PWM Duty Cycle (T = T ) J register. The register is compared with pre-defined threshold values. The six threshold values are equally T < TL “OFF” distributed over a pre-defined range of temperatures T < = T < T 50% L 1 (See Table3-1 and Table3-2). The TC652/TC653 T < = T < T 60% 1 2 control the speed of a DC brushless fan using a T < =T < T 70% fractional speed control scheme. The output stage 2 3 requires only a 2N2222-type small-signal BJT for fans T3 < =T < T4 80% up to 300mA. For larger current fans (up to 1 Amp) a T < = T < T 90% 4 H logic-level N-channel MOSFET may be used. In T < = T < T 100% addition to controlling the speed of the fan, the TC652/ H OV T < = T 100% with Over-Temp Alert TC653 include an on-chip over-temperature alarm OV (TOVER) that gives a low-true signal when the (TOVER = L) temperature of the chip exceeds T by 10°C. This Note: The temperature regions defined by the six tempera- H feature eliminates the need for a separate temperature ture thresholds are pre-defined in the TC650/651 by means of trimming. Once a T and T are programmed, the T - T sensor for over-temperature monitoring. L H 1 4 thresholds are automatically equally spaced between T and L In normal fan operation, a pulse-train is present at TH. SENSE, Pin 5. A Missing Pulse Detector monitors this pin during fan operation (FanSense™ technology). A FIGURE 3-1: FUNCTIONAL BLOCK stalled, open, or unconnected fan causes the TC652/ DIAGRAM TC653 to trigger its Start-up Timer once. If the FAULT persists, the FAULT output goes low, and the device is VDD TOVER SHDN V+ latched in its Shutdown mode. To release the fan from shutdown, toggle the SHDN or VDD pin. Temperature Duty Cycle Set Point and Logic - Trim Range Control PWM TABLE 3-1: TEMPERATURE RANGE DEFINITION FOR TC652 AD Converter (MINIMUM-SPEED MODE) Oscillator Temperature (T = T ) PWM Duty Cycle Temp Sensor J FAULT T < TL 40% FanL oDgeictect CMPTR+ T < = T < T 50% - 20k L 1 T < = T < T 60% 90mV 1 2 - T < = T <T 70% 2 3 T < = T < T 80% 3 4 T < = T < T 90% 4 H T < = T < T 100% 3.1 PWM Output H OV T < = T 100% with Over-Temp Alert OV The PWM pin is designed to drive a low cost transistor (T = L) OVER or MOSFET as the low side power switching element in the system. This output has an asymmetric complementary drive and is optimized for driving NPN transistors or N-channel MOSFETs. Since the system relies on PWM rather than linear power control, the dissipation in the power switch is kept to a minimum. Generally, very small devices (TO-92 or SOT packages) will suffice. The frequency of the PWM is about 15Hz. The PWM is also the time base for the Start-up Timer (see paragraphs below). The PWM duty cycle has a range of 40% to 100% for the TC652 and 50% to 100% for the TC653.  2002-2012 Microchip Technology Inc. DS21452C-page 5

TC652/TC653 3.2 Start-Up Timer 3.6 Shutdown (SHDN) To ensure reliable fan start-up, the Start-up Timer turns The fan can be unconditionally shutdown by pulling low PWM high for about 2 seconds whenever the fan is the SHDN pin. During shutdown, FAULT output is high started from the off state. This occurs at power-up and and PWM output is low. This is ideal for notebook when coming out of Shutdown mode. computers and other portable applications when you need to change batteries and must not have the fan 3.3 SENSE Input running at that time. Thermal monitoring and T are OVER (FanSense™ Technology) still in operation during shutdown. I shutdown current DD is around 50A. The SENSE input, Pin 5, is connected to a low value current sensing resistor in the ground return leg of the 3.7 Auto-Shutdown Mode fan circuit through the capacitor. During normal fan operation, commutation occurs as each pole of the fan The TC653 has auto-shutdown. If the temperature is is energized. This causes brief interruptions in the fan below the factory set point at minimum speed (TL), current, seen as pulses across the sense resistor. If the PWM is low and the fan is automatically shut off (Auto- device is not in Shutdown mode, and pulses are not shutdown mode). This feature is ideal for notebook appearing at the SENSE input, a FAULT exists. The computers and other portable applications that need to short, rapid change in fan current (high di/dt) causes a conserve as much battery power as possible and thus corresponding dv/dt across the sense resistor, R . run a fan when it is only absolutely needed. The TC653 SENSE The waveform on R is differentiated and con- will continue to be active so as to monitor temperature SENSE verted to a logic-level pulse-train by CSENSE and the for TOVER. The TC653 exits Auto-shutdown mode internal signal processing circuitry. The presence and when the temperature rises above the factory set point frequency of this pulse-train is a direct indication of fan (T1). operation. 3.8 Temperature Selection Guide 3.4 FAULT (Minimum Fan Speed/Full Speed) This pin goes low to indicate a fan FAULT condition. The five temperature regions defined by the six Pulses appearing at SENSE pin due to the PWM turn- thresholds are defined in the TC652/TC653 by means ing on are blanked and the remaining pulses are of factory trimming. Once a T and T are set, the T – L H 1 filtered by a Missing Pulse Detector. If consecutive T thresholds are automatically equally spaced 4 pulses are not detected for 32 PWM cycles (about 2 between T and T . L H sec), the PWM is Low and FAULT goes low. FAULT can be disabled by momentarily toggling SHDN or V pin, DD or cycling system power. FAULT remains high during Shutdown mode. 3.5 Over-Temperature Alert (T ) OVER This pin goes low when the T set point is exceeded H by 10°C (typical). This indicates that the fan is at maximum drive, and the potential exists for system overheating: either heat dissipation in the system has gone beyond the cooling system's design limits, or some FAULT exists such as fan bearing failure or an airflow obstruction. This output may be treated as a “System Overheat” warning and used to trigger system shutdown, or bring other fans to full speed in the system. The fan will continue to run at 100% speed while T is asserted. Built-in hysteresis prevents OVER T from “chattering” when measured temperature OVER is at or near the T + 10°C trip point. As temperature H falls through the T + 10°C trip point, hysteresis H maintains the T output low until measured OVER temperature is 5°C above the trip point setting. DS21452C-page 6  2002-2012 Microchip Technology Inc.

TC652/TC653 TABLE 3-3: TEMPERATURE SELECTION 4.0 TYPICAL APPLICATIONS GUIDE 4.1 Reducing Switching Noise Temp. Range °C TL TH Part # For fans consuming more than 300mA, a slowdown capacitor (C ) is recommended for reducing 10°C 25 35 AC SLOW switching PWM induced noise (see Figure4-1). The 30 40 BD value of this capacitor should be 4.7F to 47F, 35 45 CE depending on the fan current consumption. 15°C 25 40 AD See Application Note AN771 “Suppressing Acoustic 30 45 BE Noise in PWM Fan Speed Control Systems” for more 20°C 25 45 AE information. 30 50 BF FIGURE 4-1: REDUCING SWITCHING 35 55 CG NOISE 30°C 25 55 AG Note: The Bold Type temperature settings are available for ordering. +12V Contact factory for other temperature selections. T and T can be selected in 5°C increments. T must L H H TC652 DC Fan be chosen at least 10°C higher than TL. TL can range +5V VDD TC653 400mA anywhere from 25°C to 35°C. - Max. 1kΩ As an example, suppose you wanted the fan to run at 1 VDD PWM 8 40% speed at 25°C or less and go to full speed at 10µF 45°C. You would order the part number TC652AEVUA. 2 FAULT GND 7 CSLOW As another example, suppose you wanted the fan to 3 SHDN TOVER 6 0.01µF turn on at 30°C and go to full speed at 45°C. You 4 GND NC 5 would order the part number TC653BEVUA. CSENSE RSENSE GND 2Ω SHDN Control Over-Temp Alert Fan Fault Alert µController GND  2002-2012 Microchip Technology Inc. DS21452C-page 7

TC652/TC653 5.0 TYPICAL CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. IDD vs. Temperature Temp Accuracy vs. VTH PWM, ISOURCE vs. (VDD - VOH), TA = 25˚C 90 3.0 1.0 80 0.9 2.5 70 C) 0.8 I(µA)DD 654000 VDD = 5.6V VDD = 2.7V ACCURACY (˚ 21..05 – V(V) DDOH0000....4567 VDD = 2.8V VDD = 5.5V 30 MP 1.0 VDD = 5.6V V0.3 E 20 T 0.5 0.2 10 VDD = 2.7V 0.1 0 0.0 0.0 -50 -25 0 25 50 75 100 125 150 TL T1 T2 T3 T4 TH 0 2 4 6 8 10 12 14 16 18 20 TEMPERATURE (˚C) TTHRESHOLD ISOURCE (mA) PWM, ISINK vs. VOL, TA = 25˚C TOVER, ISOURCE vs. (VDD - VOH), TA = 25˚C FAULT, ISOURCE vs. (VDD - VOH), TA = 25˚C 500 1.0 1.0 450 0.9 0.9 400 0.8 VDD = 2.8V 0.8 VDD = 2.8V V(mV) OL122335500500000 VDD = 2.8V VDD = 5.5V V– V(V) DDOH00000.....34567 VDD = 5.5V V– V(V) DDOH00000.....34567 VDD = 5.5V 100 0.2 0.2 50 0.1 0.1 0 0.0 0.0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 ISINK (mA) ISOURCE (mA) ISOURCE (mA) TC652/3, Fan is Running TC653, Fan is Not Running FAULT, ISINK vs. VOL, TA = 25˚C SHDN is Connected to VDD, TA = 25˚C SHDN is Connected to VDD, TA = 25˚C 500 450 400 5.0 5.0 350 VDD = 2.8V mV) 300 VDD0.0 Start-Up Time VDD0.0 V( OL250 VDD = 5.5V 5.0 5.0 200 150 PWM0.0 PWM0.0 100 5.0 5.0 50 0 FAULT0.0 FAULT0.0 0 1 2 3 4 5 6 7 8 9 10 0 0.5 1.01.5 2.0 2.53.03.54.0 4.5 5.0 0 1 2 3 4 5 6 7 8 9 10 ISINK (mA) 500msec/Div 1sec/Div DS21452C-page 8  2002-2012 Microchip Technology Inc.

TC652/TC653 6.0 PACKAGING INFORMATION 6.1 Package Marking Information Package marking data not available at this time. 6.2 Taping Form Component Taping Orientation for 8-Pin MSOP Devices User Direction of Feed PIN 1 W P Standard Reel Component Orientation for TR Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8-Pin MSOP 12 mm 8 mm 2500 13 in  2002-2012 Microchip Technology Inc. DS21452C-page 9

TC652/TC653 6.3 Package Dimensions Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 8-Pin MSOP PIN 1 .122 (3.10) .197 (5.00) .114 (2.90) .189 (4.80) .026 (0.65) TYP. .122 (3.10) .114 (2.90) .043 (1.10) MAX. 6° MAX. .008 (0.20) .005 (0.13) .016 (0.40) .006 (0.15) .028 (0.70) .010 (0.25) .002 (0.05) .016 (0.40) Dimensions: inches (mm) DS21452C-page 10  2002-2012 Microchip Technology Inc.

TC652/TC653 7.0 REVISION HISTORY Revision C (December 2012) Added a note to each package outline drawing.  2002-2012 Microchip Technology Inc. DS21452C-page 11

TC652/TC653 NOTES: DS21452C-page 12  2002-2012 Microchip Technology Inc.

TC652/TC653 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. Your local Microchip sales office 2. The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  2002-2012 Microchip Technology Inc. DS21452C-page 13

TC652/TC653 NOTES: DS21452C-page 14  2002-2012 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, dsPIC, and may be superseded by updates. It is your responsibility to FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, ensure that your application meets with your specifications. PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash MICROCHIP MAKES NO REPRESENTATIONS OR and UNI/O are registered trademarks of Microchip Technology WARRANTIES OF ANY KIND WHETHER EXPRESS OR Incorporated in the U.S.A. and other countries. IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, INCLUDING BUT NOT LIMITED TO ITS CONDITION, MTP, SEEVAL and The Embedded Control Solutions QUALITY, PERFORMANCE, MERCHANTABILITY OR Company are registered trademarks of Microchip Technology FITNESS FOR PURPOSE. Microchip disclaims all liability Incorporated in the U.S.A. arising from this information and its use. Use of Microchip Silicon Storage Technology is a registered trademark of devices in life support and/or safety applications is entirely at Microchip Technology Inc. in other countries. the buyer’s risk, and the buyer agrees to defend, indemnify and Analog-for-the-Digital Age, Application Maestro, BodyCom, hold harmless Microchip from any and all damages, claims, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, suits, or expenses resulting from such use. No licenses are dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, conveyed, implicitly or otherwise, under any Microchip ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial intellectual property rights. Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. GestIC and ULPP are registered trademarks of Microchip Technology Germany II GmbH & Co. & KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2002-2012, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: 9781620768334 QUALITY MANAGEMENT SYSTEM Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and CERTIFIED BY DNV Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures == ISO/TS 16949 == are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.  2002-2012 Microchip Technology Inc. DS21452C-page 15

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