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STCC02-ED5 bảng dữ liệu(PDF) 5 Page - STMicroelectronics |
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STCC02-ED5 bảng dữ liệu(HTML) 5 Page - STMicroelectronics |
5 / 13 page STCC02-ED5 5/13 ■ The magnetron relay coil driver This robust driver interfaces a DC relay coil and an MCU output. The relay coil power is rated up to 1.2 W for VCC = 12V. Its output stage is made of a transistor and a demagnetization diode. The transistor's reference is to the power ground COM and has a DC current rating of 100 mA. Its collector is connected to the outputs MAG2. The diode is connected between the output pin MAG2 and the Door Switch pin DS. To enhance safety rules and to prevent any unventilated operation of the magnetron, the relay coil mag- netization is enabled by the fan conduction state that becomes a logic signal FAN1\. Furthermore, its demagnetization node is connected to the door switch pin DS: when the oven door is open, the coil of the magnetron relay is immediately disconnected from the relay supply VCC to switch off these heating loads. The boolean rule of the magnetron relay operation becomes: (Magnetron relay ON) = DS.IN2.FAN1\. ■ Fan relay coil driver This robust driver interfaces a DC relay coil and an MCU output. The relay coil power is rated up to 1.2W for VCC =12 V. Its output stage is made of a transistor and a demagnetization diode. The transistor is referred to the ground COM, has a DC current rating of 100 mA; and its collector is connected to the output FAN1. The diode is connected between the output pin FAN1 and the supply pin VCC. VDD MAG2 IN2 FAN1 DS Demagnetizing Diode Relay Transistor 15 k Ω VCC VCC VDD VDD BUZ3 FAN1 IN3 IN1 Relay Transistor Buzzer Transistor Demagnetizing Diode 50 k Ω 15 k Ω 1.5 k Ω |
Số phần tương tự - STCC02-ED5 |
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Mô tả tương tự - STCC02-ED5 |
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