TC642BEOA713 Microchip Technology, TC642BEOA713 Datasheet
TC642BEOA713
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TC642BEOA713 Summary of contents
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... MIN GND 4 5 2003 Microchip Technology Inc. TC642B/TC647B Description The TC642B/TC647B devices are new versions of the existing TC642/TC647 fan speed controllers. These devices are switch mode, fan speed controllers that incorporate a new fan auto-restart function. Tempera- ture-proportional speed control is accomplished using pulse width modulation ...
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... TC642B/TC647B Functional Block Diagram TC642B/TC647B V OTF Clock Generator V MIN V SHDN GND DS21756B-page Note Note: The V is for the TC642B device only. Control Logic 3xT PWM V Timer OUT Start-up Timer FAULT Missing Pulse Detect SENSE (typ) comparator OTF 2003 Microchip Technology Inc. ...
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... Shutdown Mode Hysteresis SHDN REL Input Leakage IN MIN Pulse-Width Modulator PWM Frequency Note 1: Ensured by design, tested during characterization. 2: For V < 3.7V, t and t DD STARTUP 2003 Microchip Technology Inc. TC642B/TC647B PIN FUNCTION TABLE Name +0.3V) MIN DD GND SENSE FAULT V OUT V DD Sym ...
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... A — 200 JA — 155 JA — 125 JA < +85° 3.0V to 5.5V Max Units Conditions 90 mV — µsec 0 2 — sec Note 2 — sec Note 2 — sec Units Conditions °C °C °C — °C/W — °C/W — °C/W 2003 Microchip Technology Inc. ...
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... TIMING SPECIFICATIONS t STARTUP V OUT FAULT SENSE FIGURE 1-1: TC642B/TC647B Start-Up Timing. 33.3 msec ( µ OUT FAULT SENSE FIGURE 1-2: Fan Fault Occurrence. V OUT FAULT Minimum 16 pulses SENSE FIGURE 1-3: Recovery From Fan Fault. 2003 Microchip Technology Inc. TC642B/TC647B t DIAG DS21756B-page 5 ...
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... TC642B/TC647B Electrical Characteristics Test Circuit. DS21756B-page µF 0.1 µ OUT TC642B TC647B K 6 FAULT 5 SENSE GND are adjusted to get the necessary 1 µF value Current 0.1 µF + limited - voltage source Current + limited - voltage source SENSE (pulse voltage source) 2003 Microchip Technology Inc. ...
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... 3. 100 200 300 400 500 (mV FIGURE 2-3: PWM Source Current (I vs 2003 Microchip Technology Inc. TC642B/TC647B = 5V +25°C. A 30.50 30.00 29.50 29.00 28. 110 125 -40 -25 -10 FIGURE 2-4: Temperature. 170 Pins 6 & 7 Open 165 C F 160 155 = 4.0V 150 145 140 135 ...
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... FIGURE 2-12: vs. Temperature 110 125 Temperature (ºC) Sense Threshold ) vs. Temperature 100 150 200 250 300 350 400 V (mV) OL FAULT 110 125 Temperature (ºC) PWM Source Current (I OH 2003 Microchip Technology Inc. ) ...
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... DD 0.75 0. 4.0V 0.65 DD 0.60 0.55 0. 3.0V DD 0.45 0.40 -40 -25 - Temperature (ºC) FIGURE 2-15: V Threshold vs. REL Temperature. 2003 Microchip Technology Inc. TC642B/TC647B = 5V +25°C. A 2.630 2.625 2.620 V = 5.0V DD 2.615 2.610 2.605 2.600 2.595 95 110 125 -40 -25 -10 ) vs. FIGURE 2-16: OL Temperature. 100 ...
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... V 3.7 Power Supply Input (V The V pin with respect to GND provides power to the DD device. This bias supply voltage may be independent of the fan power supply. F sets the MIN voltage IN treshold of 2.62V (typical). This gives . ) OUT output is continuously on. OUT ) DD 2003 Microchip Technology Inc. ...
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... Vce-sat). The PWM approach to fan speed control results in much less power dissipation in the drive element, allowing smaller devices to be used while not requiring 2003 Microchip Technology Inc. TC642B/TC647B special heatsinking to remove the power being dissipated in the package. The other advantage of the PWM approach is that the voltage being applied to the fan is always near 12V ...
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... CMAX ized as V and has a typical value of 1.4V with CSPAN minimum and maximum values of 1.3V and 1.5V, respectively. EQUATION PWM DUTY CYCLE ( CMIN Duty Cycle (%) = CMAX 2003 Microchip Technology Inc. pin, the CMAX 80 100 voltage, which- pin to the PWM IN and CMIN ...
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... V (V) = (40 * 1.4) + 1.20 MIN 100 V = 1.76V MIN 2003 Microchip Technology Inc. TC642B/TC647B If the voltage at the V cycle of the V 40% value that is now set by the voltage at the V pin. In this manner, the fan will continue to operate at 40% speed even when the temperature (voltage at V continues to decrease. ...
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... MIN level dur- SHDN output will be shutdown OUT voltage then increases above MIN pin IN voltage level, the TC642B/ MIN output to 100% duty cycle. If the fan OUT output will be driven to the OUT input. MIN Fan Current With DC Offset 2003 Microchip Technology Inc. ...
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... FIGURE 4-8: Sensing Scheme For Fan Current. The fan current flowing through R SENSE voltage that is proportional to the current. The C capacitor removes any DC portion of the voltage 2003 Microchip Technology Inc. TC642B/TC647B across R SENSE portion to the SENSE pin of the TC642B/TC647B devices. The R and C ...
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... M.P.D. Expired? No Yes = 0 OUT Yes > Power-Up REL Yes Shutdown OUT No V > MIN REL Yes Power-Up FAULT = 0 TC642B Only Yes Fire Diagnostic Timer (100 msec) Fire Start-up No Fan Pulse Timer Detected? (1 sec) Yes Fan Pulse Detected? No Fan Fault 2003 Microchip Technology Inc. ...
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... One of the simplest ways of sensing temperature over a given range is to use a thermistor. By using an NTC thermistor, as shown in Figure 5-1, a temperature variant voltage can be created. 2003 Microchip Technology Inc. TC642B/TC647B R T FIGURE 5-1: Circuit. ...
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... AC couples this SENSE . Figure 5-3 illustrates a SENSE FAN R ISO 715 C SENSE R SENSE (0.1 µF typical) values. SENSE Typical Sense Network. will change with the cur- SENSE , the operating SENSE values to be easily changed while SENSE according to the SENSE 2003 Microchip Technology Inc. ...
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... Figure 5-4 shows some typical waveforms for the fan current and the voltage at the SENSE pin. FIGURE 5-4: Typical Fan Current and SENSE Pin Waveforms. 2003 Microchip Technology Inc. TC642B/TC647B Another important factor to consider when selecting the SENSE R value is the fan current value during a locked SENSE rotor condition ...
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... Put- ting a resistor between V and the gate of the OUT MOSFET will also help slow down the turn-off and limit this condition. FAN Q V OUT R SENSE GND Q : N-Channel MOSFET 1 FIGURE 5-6: Clamp Diode For Fan Turn- Off. 2003 Microchip Technology Inc. 1 ...
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... IN 0.01 µF capacitor. In order to keep fan noise off of the TC642B/TC647B device ground, individual ground returns for the TC642B/TC647B and the low side of the fan current sense resistor should be used. 2003 Microchip Technology Inc. TC642B/TC647B Fan Bias FAN ...
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... T0 is the temperature of interest. All temperatures are given in degrees kelvin. Using this equation, the values for the thermistor are found to be (20ºC) = 127,462 (40ºC) = 50,520 T FBA06T12H Locked rotor @ 25ºC and voltage – exp ------------------------ ² 298.15 and T 0 2003 Microchip Technology Inc. ...
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... IN V(T2) represents the V voltage at 40ºC. Solving the IN equations simultaneously yields the following values ( 238,455 45,161 2 2003 Microchip Technology Inc. TC642B/TC647B Using standard 1% resistor values, the selected R R values are 237 45 graph of the V R resistance TEMP configuration is shown in Figure 5-10 ...
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... Now that all the values have been selected, the sche- matic representation of this design can be seen in Figure 5-13. SENSE pin voltage with This number will set SENSE 2003 Microchip Technology Inc. ...
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... V and V IN MIN were added simply to remove any noise present that might cause false triggerings or PWM jitter. R pull-up resistor for the FAULT output. The value for this resistor is system-dependent. 2003 Microchip Technology Inc. TC642B/TC647B + C VDD ® 1.0 µF 8 ...
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... Standard device marking consists of Microchip part number, year code, week code, and traceability code. DS21756B-page 26 Example: TC642BCPA 025 0215 Example: TC642B COA0215 025 Example: TC642B 215025 2003 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 2003 Microchip Technology Inc. TC642B/TC647B ...
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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. 2003 Microchip Technology Inc. ...
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... Lead Width Mold Draft Angle Top Mold Draft Angle Bottom *Controlling Parameter 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: MO-187 Drawing No. C04-111 2003 Microchip Technology Inc. TC642B/TC647B φ ...
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... TR Suffix Device Pitch (P) Part Per Full Reel 8 mm 2500 User Direction of Feed W P Standard Reel Component Orientation for 713 or TR Suffix Device Pitch (P) Part Per Full Reel 8 mm 2500 Reel Size 13 in. Reel Size 13 in. 2003 Microchip Technology Inc. ...
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... Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2003 Microchip Technology Inc. TC642B/TC647B . Examples: a) TC642BEOA: SOIC package. b) TC642BEOA713: Tape and Reel, SOIC package. c) TC642BEPA: PDIP package. d) TC642BEUA: MSOP package. a) TC647BEOA: SOIC package. b) TC647BEPA: PDIP package. ...
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... TC642B/TC647B NOTES: DS21756B-page 32 2003 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. © 2003, 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: 65-6s334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology (Barbados) Inc., Taiwan Branch 11F-3, No ...