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Functional Description
Question 1
What is the accuracy of the TRIAC and RELAY output delay?
Answer
If the external resistor and capaciator tolerances are not taken into account, then the delay tolerence of the HT7612
at room temperature is within ± 5%.
Question 2
What output drive types can the HT7612 drive after detection?
Answer
Both RELAY and TRIAC output driver types.
Question 3
What kind of signal will be generated when a low bit condition is detected by the HT7612 ?
Answer
The LED will start flickering at two second internals, and the buzzer will also produce an audio alarm at an interval of two seconds.
Question 4
How is a CDS and LVD detecting circuit designed?
Answer
1. The CDS threshold voltage level is 1.1V(typ.). When the input voltage is larger than 1.1V(typ.), the system will judge this to be nighttime. When the input voltage is smaller than 1.1V(typ.), the system will be judge this to be daytime.
2. The LVD threshold voltage level is 1.1V(typ.). When the input voltage is larger than 1.1V(typ.), the system will be judge the power supply voltage to be sufficient. When the input voltage is smaller than 1.1V(typ.), the system will judge the power supply voltage to be insufficient.
Application Description
Question 1
What is the range of delay that the HT7612 can control?
Answer
Using external RC components, the duration can range from 1 to 3783 seconds.
Question 2
How is the detection sensitivity adjusted?
Answer
By decreasing or increasing the value of the1MΩ resistor on the OP2N and OP2O pins, the PIR sensitivity can be adjusted to the desired level.
Question 3
How are the system quick warm-up and quick start functions enabled?
Answer
At power-on, the MODE pin should be high to implement these functions.
Others
Question 1
What are the package types of the HT7612?
Answer
16Pin-DIP, 16Pin-NSOP.
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