TC646VOA Microchip Technology, TC646VOA Datasheet

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... AS ensures reliable motor start-up at turn-on, coming out of shutdown mode, auto-shutdown mode or following a transient fault. The TC646 features Microchip Technology's propri- etary 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 TC646 to trigger its Start-up Timer once ...

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... TC646 Functional Block Diagram – – SHDN GND DS21446C-page – OTF OTF – PWM + Control Logic PWM Timer Clock Generator Start-up Timer SHDN Missing Pulse Detect. TC646 + – 10k 70mV (typ OUT FAULT SENSE 2002 Microchip Technology Inc. ...

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... 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 ...

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... Ensured by design, not tested. DS21446C-page 3.0V to 5.5V MIN A MAX DD Min Typ Max 2.5 2.65 2.8 1.3 1.4 1.5 V — V C(MAX) ~ C(MAX) V C(SPAN) — — 0. 0.19 — — DD — 0. — DD — 70 — Units Test Conditions 5V, DD See Figure 5- 1.0 µF F 2002 Microchip Technology Inc. ...

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... the positive terminal for the PWM ramp generator F timing capacitor. The recommended PWM operation. 2002 Microchip Technology Inc. 2.3 Analog Input (V An external resistor divider connected to the V sets the auto-shutdown threshold. Auto-shutdown occurs when V restarted when V “Typical Applications”, for more details). ...

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... Figure 3-1)). The Start-up Timer is triggered and is SENSE normal operation is resumed upon exiting auto-shut- down mode. The FAULT output is unconditionally inactive in auto-shutdown mode µF pulse is not F below V and IN SHDN . When one of these REL becomes less than the voltage on 2002 Microchip Technology Inc. ...

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... Note < V when the device exits shutdown IN AS mode, the fan will not restart as it will be in auto-shut- down mode. 2002 Microchip Technology Inc. Normal Auto-Shutdown Operation Mode Time If a fan fault has occurred and the device has latched itself into shutdown mode, performing a reset will not ...

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... then above (V SHDN (1) While in this state, FAULT is latched on (low) and the V output is disabled. OUT (2) A reset sequence applied to the V loop to Power-up. (3) End HAS > OTF on IN being brought below power-cycling). AS HAS pin will exit the IN 2002 Microchip Technology Inc. ...

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... OUT Auto-Shutdown FAULT = 1 V < SHDN OUT Yes Yes No V > > REL IN AS HAS No Yes Power-Up FIGURE 4-1: TC646 Behavioral Algorithm Flowchart. 2002 Microchip Technology Inc. Normal Operation Clear Missing Pulse Detector V IN < SHDN V > REL No Yes V < Yes > > OTF + V ...

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... TC642EV (DS21403) and TC642DEMO (DS21401). Figure 5-1 shows the base schematic for the TC642DEMO. , must SENSE NTC FAULT TC646 V OUT SENSE GND and the TC642 Evaluation Kit +12V Fan 6 Thermal Q 1 Shutdown R BASE SENSE R SENSE 2002 Microchip Technology Inc. ...

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... It is suggested that a maxi- mum temperature range of 50°C be used with this cir- cuit due to thermistor linearity limitations. With this change adjusted according to the following 2 equations: 2002 Microchip Technology Inc. EQUATION must output a IN Where T and ...

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... At very low duty cycles, the OUT output will OUT ™ Network and C ) SENSE and SENSE ™ technology). This network is to convert the fan SENSE serves to AC-couple this SENSE to provide the SENSE . Smaller values require SENSE . Figure 5-4 SENSE 2002 Microchip Technology Inc. AS ...

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... The end result of employ- ing Table 5-1 is that the signal developed across the sense resistor is approximately 450 mV in amplitude. 2002 Microchip Technology Inc. TABLE 5-1: Nominal Fan Current (mA) Q ...

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... BE (SAT) R BASE = FAN SENSE = BASE BASE = FAN FE in Section 1. given in the BE (SAT (SAT) R SENSE = I BASE offsets the -12V 1 off when 1 is high, the voltage at the OUT increases causing Q to turn on. OUT Fan OUT R SENSE GND c) N-Channel MOSFET 2002 Microchip Technology Inc. ...

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... IC itself. Even if the IC and any external networks are powered by the same supply, physical separation of the connecting points can result in enough parasitic capacitance and/ or inductance in the power supply connections to delay one power supply “routing” versus another. 2002 Microchip Technology Inc 2.2 k ...

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... TC646 following detection of a fault condition. The FAULT out- put can be connected to the controller's interrupt input another I/O pin, for polled operation. (5% toler- 6 +12V Fan 6 Fan/Thermal Q 1 Fault R 7 800 SENSE R 0.1 F SENSE 2.2 2002 Microchip Technology Inc. ...

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... Data from one or more Sensors I/O3 CMOS Microcontroller GND INT FIGURE 5-10 Microcontroller Peripheral. TC646 1 5. 5.0V DD 0.8 0 4.0V DD 0.6 0.5 0.4 0˚C FIGURE 5-11: V vs. Temperature. RELEASE 2002 Microchip Technology Inc. (RESET) (Optional 110 k 1 (MSB 240 k . 360 (LSB ...

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... 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. DS21446C-page 18 Example: TC646VPA 025 0215 Example: TC646VOA 0215 025 Example: TC646E 215025 2002 Microchip Technology Inc. ...

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... 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-001 Drawing No. C04-018 2002 Microchip Technology Inc ...

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... B .013 .017 .020 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 0.51 0.48 0.62 0. 0.20 0.23 0.25 0.33 0.42 0. 2002 Microchip Technology Inc. ...

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... Lead Width 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. Drawing No. C04-111 2002 Microchip Technology Inc Units INCHES ...

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... Standard Reel Component Orientation for 713 Suffix Device Carrier Width (W) Pitch (P) Part Per Full Reel 2500 User Direction of Feed P Standard Reel Component Orientation for 713 Suffix Device Pitch (P) Part Per Full Reel 2500 W Reel Size Reel Size 13 in 2002 Microchip Technology Inc. ...

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... 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 ...

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... 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? DS21446C-page24 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21446C 2002 Microchip Technology Inc. ...

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... 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. TC646 Examples: a) TC646VOA: PWM Fan Speed Controller w/ Auto Shutdown and Fault Detection, SOIC package. b) TC646VUA: PWM Fan Speed Controller w/ Auto Shutdown and Fault Detection, MSOP package ...

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... TC646 NOTES: DS21446C-page 26 2002 Microchip Technology Inc. ...

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... 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 ...

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... 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 ...