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MAX6510CAUT-T Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX6510CAUT-T Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 9 page MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches 7 Maxim Integrated Low-Cost, Fail-Safe Temperature Monitor In high-performance/high-reliability applications, multi- ple temperature monitoring is important. The high-level integration and low cost of the MAX6509/MAX6510 facilitate the use of multiple temperature monitors to increase system reliability. Figure 6 shows two MAX6510s with different temperature thresholds. This ensures that fault conditions that can overheat the mon- itored device cause no permanent damage. The first temperature monitor activates the fan when the die temperature exceeds +45°C. The second MAX6510 triggers a system shutdown if the die temperature reaches +75°C. The second temperature monitor’s out- put asserts when a wide variety of destructive fault con- ditions occur, including latchups, short circuits, and cooling-system failures. Set-Point Resistor To set the trip-point temperature, connect a resistor between SET and GND. The resistor’s value is deter- mined either from the RSET vs. Temperature graphs (see Typical Operating Characteristics) or from the equations below. To set the temperature trip point from -40°C to 0°C, use the following equation: RSET(k Ω) = [(1.3258 · 105) / (T+1.3)] - 310.1693 - [(5.7797 · 106) / (T+1.3)2] To set the temperature trip point from 0°C to +125°C, use the following equation: RSET(k Ω) = [(8.3793 · 104) / T] - 211.3569 + [(1.2989 · 105) / T2] where T is the trip temperature in Kelvin. MAX6509CAUK MAX6509HAUK +5V HYST SET HYST GND VCC GND VCC RPULL-UP 100k OUT OUT OUT OF RANGE MAX6510HAUT HYST VCC VCC 100k RSET RSET RSET 100k 30k OUTSET GND +5V MAX6510CAUT GND SET OUTSET HYST VCC VCC OUT 30k OUT OUT OF RANGE OVERTEMP UNDERTEMP RSET Figure 5. Temperature-Window Detector MAX6510HAUT GND HYST +5V 30k RSET MAX6510HAUT GND HYST SET VCC VCC OUT SET OUT OUTSET OUTSET TEMPERATURE FAULT FAN CONTROL µP HEAT HEAT 55k RSET VCC VCC Figure 6. Low-Power, High-Reliability, Fail-Safe Temperature Monitor |
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