TC649EUA Microchip Technology, TC649EUA Datasheet

Page 1

... File Servers • Portable Computers • Telecom Equipment • UPSs, Power Amps • General Purpose Fan Speed Control Available Tools • Fan Controller Demonstration Board (TC642DEMO) • Fan Controller Evaluation Kit (TC642EV) 2002 Microchip Technology Inc. TC649 Package Types SOIC/PDIP/MSOP ...

Page 2

... TC649 Functional Block Diagram – – SHDN GND DS21449C-page 2 TC649 – PWM + Control Logic PWM Timer Clock Generator Start-up Timer SHDN Missing Pulse Detect + – 10k 70mV (typ OUT FAULT SENSE 2002 Microchip Technology Inc. ...

Page 3

... F PWM Frequency OSC 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

... MOSFET. This output has asymmetrical drive (see Section 1.0, “Electrical Characteristics”). 2.8 Power Supply Input ( µF for F V may be independent of the fan’s power supply DD (see Section 1.0, “Electrical Characteristics”). ) AS input The fan is automatically See Section 5. HAS ). SENSE ) OUT ) DD 2002 Microchip Technology Inc. ...

Page 5

... SENSE The presence and frequency of this pulse-train is a direct indication of fan operation. See Section 5.0, “Typical Applications”, for more details. 2002 Microchip Technology Inc. 3.5 FAULT Output Pulses appearing at SENSE due to the PWM turning on are blanked, and the remaining pulses are filtered by a missing pulse detector ...

Page 6

... V Shut- Normal Down Operation HI TEMP. t RESET LO > not IN AS HAS upon exiting shutdown mode, AS HAS > when the device IN AS HAS (50mV threshold. SHDN REL and V in Section 1.0, SHDN REL IN < HAS 2002 Microchip Technology Inc. ...

Page 7

... Quit Normal Operation and go to Fan Fault. (9) End. 2002 Microchip Technology Inc. 4.3 Fan Fault Fan Fault is an infinite loop wherein the TC649 is latched in shutdown mode. This mode can only be released by a reset (i ...

Page 8

... Yes Yes Shutdown OUT No V > REL Yes Auto Yes Shutdown OUT Power- > HAS Yes Hot Start No M.P.D. Expired? Yes Fire Diagnostic Timer (100msec) No Fire Start-up Yes Fan Pulse Timer Detected? (1 Sec) Yes Fan Pulse Detected? No Fan Fault 2002 Microchip Technology Inc. ...

Page 9

... Latch-up Considerations in Section 5.0, "Typical Applications". **Optional. See Section 5.0, "Typical Applications" for details. FIGURE 5-1: Typical Application Circuit. 2002 Microchip Technology Inc. The TC642 demonstration and prototyping board (TC642DEMO) (TC642EV) provide working examples of TC649 cir- cuits and prototyping aids. The TC642DEMO is a ...

Page 10

... AS drops below the set temperature with the V input, 1.25V to 2.65V IN , respectively. Assuming that the temper 1.25 - 1.25 2.65V - 1.25V 1. 1. corresponds 0° 125°C, and the 1 2 1.4V ( 1.25 = 1.53V (125 - 0) 2002 Microchip Technology Inc ...

Page 11

... In this case, the standard values of 34.8 k 15.4 k are very close to the calculated values and would be more than adequate. 2002 Microchip Technology Inc. 5.3 Operations at Low Duty Cycle One boundary condition which may impact the selection of the minimum fan speed is the irregular activation of the Diagnostic Timer due to the TC649 “ ...

Page 12

... SENSE when “on”. R VS. FAN CURRENT SENSE SENSE 50 9.1 100 4.7 150 3.0 200 2.4 250 2.0 300 1.8 350 1.5 400 1.3 450 1.2 500 1.0 in Figures 5-1, 5-4, 5-6, 5-7, 5-8 and 5-9. 2002 Microchip Technology Inc. ...

Page 13

... SO-8 SI2308 SOT-23 Note 1: A series gate resistor may be used in order to control the MOSFET turn-on and turn-off times. 2002 Microchip Technology Inc. be enough to saturate the transistor when conducting the full fan current (transistor must have sufficient gain); (3) the V ficiently drive the gate of the MOSFET to minimize the R of the device ...

Page 14

... Powering the Fan from a -12V Supply. DS21449C-page BASE in Section 1. 80 offsetting the 1 FIGURE 5-7: off BASE to turn 2 OUT D 1 12.0V Zener V DD Fan R BASE – BASE + – (SAT SENSE SENSE – GND Circuit For Determining FAN 2.2 -12V 2002 Microchip Technology Inc. ...

Page 15

... FIGURE 5-9: Design Example. 2002 Microchip Technology Inc. a high impedance source (such as a thermistor). Addi- tionally, the V input should be bypassed with a 1 µF DD capacitor with grounds being kept as short as possible. To keep fan noise off the TC649 ground pin, individual ground returns for the TC649 and the low side of the fan current sense resistor should be used ...

Page 16

... R 1 110 k (MSB 240 k .01 µ 360 k R 1µ (LSB 1 + +5V .01µ vs. Temperature RELEASE = 5.5V = 5. 3.0V DD 25˚C TEMPERATURE +12V +5V Fan µ 800 2N2222A F OUT +5V TC649 FAULT 0.1 µF 5 GND SENSE R 11 2.2 85˚C 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. TC649 Example: TC649VPA ...

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

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

Page 22

... TC649 NOTES: DS21449C-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? DS21449C-page24 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21449C 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. TC649 Examples: a) ...

Page 26

... TC649 NOTES: DS21449C-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 ...