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MC33164LP 数据表(PDF) 7 Page - Microsemi Corporation |
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MC33164LP 数据表(HTML) 7 Page - Microsemi Corporation |
7 / 7 page 5V U NDER VOL T A G E S ENSING C IRCUIT MC33164/MC34164 PRODUCT DA T ABOOK 1996/1997 7 Copyright © 1997 Rev. 1.5 11/97 P RODUCTION D AT A S HEET TYPICAL APPLICATION CIRCUITS FIGURE 8. — LOW-VOLTAGE MICROPROCESSOR RESET POWER SUPPLY 1.2 V REF RESET 2 1.0k 1 3 FIGURE 9. — VOLTAGE MONITOR FIGURE 7. — SWITCHING THE LOAD OFF WHEN BATTERY VOLTAGE REACHES BELOW 4.3V A time delayed reset can be accomplished with the addition of C DLY . For systems with extremely fast power supply rise times (< 500ns) it is recommended that the RC DLY time constant be greater than 5.0µs. V TH(MPU) is the microprocessor reset input threshold. POWER SUPPLY 1.2 V REF MICROPROCESSOR CIRCUIT RESET C DLY R 2 1 3 1.2 V REF LOAD RESET 2 4 1 1.2 V REF 2 270 4.3V V CC R L SMP60N03-10L 1 3 FIGURE 10. — MOSFET LOW-VOLTAGE GATE DRIVE PROTECTION Overheating of the logic level power MOSFET due to insufficient gate voltage can be prevented with the above circuit. When the input signal is below the 4.3 volt threshold of the MC34164, its output grounds the gate of the L 2 MOSFET. t DLY = R CDLY In V TH(MPU) V IN 1 - 1 |
类似零件编号 - MC33164LP |
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类似说明 - MC33164LP |
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