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TMP300BQDCKRQ1 Folha de dados(PDF) 6 Page - Texas Instruments |
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TMP300BQDCKRQ1 Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 14 page R = SET (T 0.01+0.5) ´ SET 3e- 6 R ink = W SET 10(50+T ) SET 3 R INT 210kW R SET T SET OUT V+ HYST SET V TEMP TMP300 3 A m Proportional toT A Open-DrainControl Voltagesource totesttrippoint. TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com APPLICATIONS INFORMATION To set the TMP300B-Q1 to trip at a preset value, The TMP300B-Q1 is a thermal sensor designed for calculate the RSET resistor value according to over-temperature protection circuits in electronic Equation 1 or Equation 2: systems. The TMP300B-Q1 uses a set resistor to program the trip temperature of the digital output. An additional high-impedance (210k Ω) analog voltage (1) output provides the temperature reading. Where TSET is in °C; or CALCULATING RSET The set resistor (RSET) provides a threshold voltage (2) for the comparator input. The TMP300B-Q1 trips Where TSET is in °C. when the VTEMP pin exceeds the TSET voltage. The value of the set resistor is determined by the analog USING VTEMP TO TRIP THE DIGITAL OUTPUT output function and the 3 μA internal bias current. The analog voltage output can also serve as a voltage input that forces a trip of the digital output to simulate a thermal event. This simulation facilitates easy system design and test of thermal safety circuits, as shown in Figure 8. Figure 8. Applying Voltage to Trip Digital Output 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 |
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