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MC33161 数据表(PDF) 10 Page - ON Semiconductor |
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MC33161 数据表(HTML) 10 Page - ON Semiconductor |
10 / 16 page MC34161, MC33161 http://onsemi.com 10 The above figure shows the MC34161 configured as a positive and negative overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’ when either –VS1 exceeds V2, or VS2 exceeds V4. With the dashed line output connection, the circuit becomes a positive and negative undervoltage detector. As the input voltage decreases from the peak towards ground, the LED will turn ‘ON’ when either VS2 falls below V3, or –VS1 falls below V1. For known resistor values, the voltage trip points are: For a specific trip voltage, the required resistor ratio is: Figure 21. Positive and Negative Overvoltage Detector V 1 + R 3 R 4 (V th1 * Vref) ) Vth1 V 2 + R 3 R 4 (V th1 * VH1 * Vref) ) Vth1 * VH1 V 3 + (Vth2 * VH2) R 2 R 1 ) 1 V 4 + Vth2 R 2 R 1 ) 1 R 3 R 4 + (V 1 * Vth1) (V th1 * Vref) R 3 R 4 + (V 2 * Vth1 ) VH1) (V th1 * VH1 * Vref) R 2 R 1 + V 4 V th2 * 1 R 2 R 1 + V 3 V th2 * VH2 * 1 + 1.27V + 1.27V + 2.8V + 0.6V + – 2.54V Reference – + – + + – 4 1 7 2 3 5 6 R4 R3 –VS1 VS2 R1 R2 8 VCC Output Voltage Pins 5, 6 Gnd LED ‘ON’ VHys2 VHys1 VCC Gnd Input –VS1 V4 V3 V1 V2 Input VS2 The above figure shows the MC34161 configured as a positive and negative undervoltage detector. As the input voltage decreases toward ground, the LED will turn ‘ON’ when either VS1 falls below V1, or –VS2 falls below V3. With the dashed line output connection, the circuit becomes a positive and negative overvoltage detector. As the input voltage increases from the ground, the LED will turn ‘ON’ when either VS1 exceeds V2, or –VS1 exceeds V1. For known resistor values, the voltage trip points are: For a specific trip voltage, the required resistor ratio is: Figure 22. Positive and Negative Undervoltage Detector V 1 + (Vth1 * VH1) R 4 R 3 ) 1 V 2 + Vth1 R 4 R 3 ) 1 V 3 + R 1 R 2 (V th * Vref) ) Vth2 V 4 + R 1 R 2 (V th * VH2 * Vref) ) Vth2 * VH2 R 4 R 3 + V 2 V th1 * 1 R 4 R 3 + V 1 V th1 * VH1 * 1 R 1 R 2 + V 4 ) VH2 * Vth2 V th2 * VH2 * Vref R 1 R 2 + V 3 * Vth2 V th2 * Vref + 1.27V + 1.27V + 2.8V + 0.6V + – – + – + + – 4 1 7 2 3 5 6 2.54V Reference 8 VCC R3 VS1 R4 R1 R2 –VS2 V2 V1 V3 V4 Gnd VCC Gnd Output Voltage Pins 5, 6 Input –VS2 Input VS1 LED ‘ON’ VHys2 VHys1 |
类似零件编号 - MC33161 |
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类似说明 - MC33161 |
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