TC642EOA713 Microchip Technology, TC642EOA713 Datasheet

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TC642EOA713

Manufacturer Part Number
TC642EOA713
Description
IC PWM FAN SPEED CONTRLR 8-SOIC
Manufacturer
Microchip Technology
Type
Controller - PWM Fanr
Datasheet

Specifications of TC642EOA713

Applications
Fan Controller, Brushless (BLDC)
Number Of Outputs
1
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Product
Fan / Motor Controllers / Drivers
Operating Supply Voltage
6 V
Supply Current
1 mA
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Voltage - Load
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TC642EOA713
Manufacturer:
MICROCHIP
Quantity:
12 000
Features
• Temperature Proportional Fan Speed for Acoustic
• Efficient PWM Fan Drive
• 3.0V to 5.5V Supply Range:
• FanSense™ Fault Detection Circuits Protect
• Shutdown Mode for "Green" Systems
• Supports Low Cost NTC/PTC Thermistors
• Space Saving 8-Pin MSOP Package
• Over-temperature Indication
Applications
• Power Supplies
• Personal Computers
• File Servers
• Telecom Equipment
• UPSs, Power Amps, etc.
• General Purpose Fan Speed Control
Available Tools
• Fan Controller Demonstration Board (TC642DEMO)
• Fan Controller Evaluation Kit (TC642EV)
M
Control and Longer Fan Life
- Fan Voltage Independent of TC642
- Supports any Fan Voltage
Against Fan Failure and Aid System Testing
2002 Microchip Technology Inc.
PWM Fan Speed Controller with FanSense
Supply Voltage
Package Types
General Description
The TC642 is a switch mode fan speed controller for
use with brushless DC fans. Temperature proportional
speed control is accomplished using pulse width mod-
ulation (PWM). A thermistor (or other voltage output
temperature sensor) connected to the V
nishes the required control voltage of 1.25V to 2.65V
(typical) for 0% to 100% PWM duty cycle. Minimum fan
speed is set by a simple resistor divider on the V
input. An integrated Start-up Timer ensures reliable
motor start-up at turn-on, coming out of shutdown
mode or following a transient fault. A logic low applied
to V
The TC642 also features Microchip Technology's pro-
prietary FanSense™ technology for increasing system
reliability. In normal fan operation, a pulse train is
present at SENSE (Pin 5). A missing pulse detector
monitors this pin during fan operation. A stalled, open
or unconnected fan causes the TC642 to trigger its
Start-up Timer once. If the fault persists, the FAULT
output goes low and the device is latched in its shut-
down mode. FAULT is also asserted if the PWM
reaches 100% duty cycle, indicating a possible thermal
runaway situation, although the fan continues to run.
See Section 5.0, “Typical Applications”, for more
information and system design guidelines.
The TC642 is available in the standard 8-pin plastic
DIP, SOIC and MSOP packages and is available in the
commercial, extended commercial and industrial
temperature ranges.
SOIC/PDIP/MSOP
MIN
V
GND
(Pin 3) causes fan shutdown.
MIN
V
C F
IN
1
2
3
4
TC642
TC642
Technology
8
7
6
5
DS21444C-page 1
V
V
FAULT
SENSE
DD
OUT
IN
input fur-
MIN

Related parts for TC642EOA713

TC642EOA713 Summary of contents

Page 1

... A logic low applied to V (Pin 3) causes fan shutdown. MIN The TC642 also features Microchip Technology's pro- prietary FanSense™ technology for increasing system reliability. In normal fan operation, a pulse train is present at SENSE (Pin 5). A missing pulse detector monitors this pin during fan operation. A stalled, open or unconnected fan causes the TC642 to trigger its Start-up Timer once ...

Page 2

... TC642 Functional Block Diagram MIN V SHDN GND DS21444C-page 2 + – – V OTF + OTF – SHDN + Control Logic PWM Timer Clock Generator Start-up Timer + – Missing Pulse Detect TC642 + – 10k 70mV (typ OUT FAULT SENSE 2002 Microchip Technology Inc. ...

Page 3

... Diagnostic Timer DIAG Note 1: Ensured by Design, not tested. 2002 Microchip Technology Inc. *Stresses above those listed under "Absolute Maximum Rat- ings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied ...

Page 4

... FET. This output has asymmetrical drive (see Section 1.0, “Electrical Characteristics”). 2.8 Power Supply Input (V input MIN V may be independent of the fan’s power supply DD (see Section 1.0, “Electrical Characteristics”). MIN V (see REL if a hard shutdown is desired. FAULT ) OUT ) DD 2002 Microchip Technology Inc. ...

Page 5

... R and R must be >10 kΩ FIGURE 3-1: Fan Fault Output Circuit. 2002 Microchip Technology Inc. Note: At this point, action must be taken to restart the fan by momentarily pulling V V SHDN case, the fan cannot remain disabled due to a fault condition, as severe system dam- age could result ...

Page 6

... Applications”, for more details). , the TC642 will go SHDN becomes MIN (0.85V @ V = 5.0V). Pulling V DD MIN will always result in complete device reset. The FAULT output is = 5.0V), is designed into the V DD SHDN SHDN . The waveform differen- SENSE 2002 Microchip Technology Inc. ...

Page 7

... Quit Normal Operation and go to Fan Fault. (10) End. 2002 Microchip Technology Inc. 4.3 Fan Fault Fan fault is an infinite loop wherein the TC642 is latched in shutdown mode. This mode can only be released by a reset (i ...

Page 8

... Fan Pulse Detected? M.P.D. Expired? No Yes No Cycling Power? Yes Yes Shutdown OUT No V > V MIN REL Yes Power-up FAULT = 0 Yes Fire Diagnostic Timer (100msec) No Fire Start-up Fan Pulse Timer Detected? (1 SEC) Yes Fan Pulse Detected? No Fan Fault 2002 Microchip Technology Inc. ...

Page 9

... TEMP temperatures is obtained from the manufacturer’s specifications. Thermistors are often referred to in terms of their resistance at 25°C. 2002 Microchip Technology Inc. The TC642 demonstration and prototyping board (TC642DEMO), and (TC642EV), provide working examples of TC642 cir- cuits and prototyping aids. The TC642DEMO is a printed circuit board optimized for small size and ease of inclusion into system prototypes ...

Page 10

... FIGURE 5-3: sets the minimum PWM duty MIN Minimum Speed x (1.4) + 1.25V = Full Speed 1000 x (1.4) + 1.25V = 1.81V 2500 , of DIV = 5.0V then; 5.0V = 100µ therefore 5. 50,000 = 50k 1 2 100µ DIV MIN R 2 GND V Circuit. IN 2002 Microchip Technology Inc. ...

Page 11

... There is no harm in this behavior, but it may be audible to the user as the fan accelerates briefly when the Diagnostic Timer fires. For this reason recommended that V be set no lower than 1.8V. MIN 2002 Microchip Technology Inc. 5.4 FanSense Network . This (R MIN SENSE ...

Page 12

... OUT V DD Fan R BASE – BASE – (SAT SENSE SENSE – GND Circuit For Determining SENSE BE (SAT) R BASE = FAN SENSE = BASE BASE = FAN FE in Section 1.0, “Electri given in the chosen BE (SAT (SAT) R SENSE = I BASE 2002 Microchip Technology Inc. ...

Page 13

... FIGURE 5-7: Output Drive Transistor Circuit Topologies. *Note: Value depends on the specific application and is shown for example only. FIGURE 5-8: Powering the Fan From a -12V Supply. 2002 Microchip Technology Inc. When V is high, the voltage at the anode of D OUT increases by V otherwise consistent with the case of fan operation from +12V ...

Page 14

... DS21444C-page 5V BE(sat) GS CEO DS Min (V) ( Fan Current Suggested (mA BASE 150 800 150 800 500 301 500 Note 1 500 Note 1 1000 Note 1 500 Note 1 2002 Microchip Technology Inc. ...

Page 15

... Fan Q 2 Shutdown (Optional) FIGURE 5-9: Design Example. 2002 Microchip Technology Inc. Design Example Step 1. Calculate R having a resistance and Step 2. Set minimum fan speed V Limit the divider current to 100 µA from which Step 3. Design the output circuit. Maximum fan motor current = 250 mA. ...

Page 16

... TC642 following detection of a fault condition. The FAULT output can be connected to the processor's interrupt input I/O pin, for polled operation. (5% tolerance) (Optional 110 240 k . 360 1 + GND 1 k +12V +5V Fan 800 OUT 2N2222A +5V TC642 FAULT MIN 0 SENSE R 11 2.2 2002 Microchip Technology Inc. ...

Page 17

... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. 2002 Microchip Technology Inc. TC642 Example: TC642CPA ...

Page 18

... MILLIMETERS MIN NOM MAX 8 2.54 3.56 3.94 4.32 2.92 3.30 3.68 0.38 7.62 7.94 8.26 6.10 6.35 6.60 9.14 9.46 9.78 3.18 3.30 3.43 0.20 0.29 0.38 1.14 1.46 1.78 0.36 0.46 0.56 7.87 9.40 10. 2002 Microchip Technology Inc. ...

Page 19

... Mold Draft Angle Top Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-012 Drawing No. C04-057 2002 Microchip Technology Inc ...

Page 20

... B .010 .012 .016 MILLIMETERS* MIN NOM MAX 8 0.65 1.18 0.76 0.86 0.97 0.05 0.15 4.90 .5.08 4.67 2.90 3.00 3.10 2.90 3.00 3.10 0.40 0.55 0.70 0.90 0.95 1. 0.10 0.15 0.20 0.25 0.30 0. 2002 Microchip Technology Inc. ...

Page 21

... Component Taping Orientation for 8-Pin MSOP Devices PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) 8-Pin MSOP 2002 Microchip Technology Inc. User Direction of Feed P Standard Reel Component Orientation for 713 Suffix Device Pitch (P) Part Per Full Reel ...

Page 22

... TC642 NOTES: DS21444C-page 22 2002 Microchip Technology Inc. ...

Page 23

... Microchip Products • Conferences for products, Development Systems, technical information and more • Listing of seminars and events 2002 Microchip Technology Inc. SYSTEMS INFORMATION AND UPGRADE HOT LINE The Systems Information and Upgrade Line provides system users a listing of the latest versions of all of Microchip's development systems software products ...

Page 24

... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21444C-page24 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21444C 2002 Microchip Technology Inc. ...

Page 25

... 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 Microchip Technology Inc. TC642 Examples: a) ...

Page 26

... TC642 NOTES: DS21444C-page 26 2002 Microchip Technology Inc. ...

Page 27

... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...

Page 28

... Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology (Barbados) Inc., Taiwan Branch 11F-3, No ...

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