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Functional Description
Question 1
The input voltage for the HT7L4091 is only 22.4V. Can it be used for 110V or even 240V AC systems? Answer
The HT7L4091 is designed as a general AC input IC. AC power can be applied to the HT7L4091 using suitable resistor, BJT or other methods of voltage reduction.
Application Description
Question 1
For what application is the HT7L4091 suitable? Answer
The HT7L4091 is suitable for LED applications such as LED light tubes, large LED backlights, intelligent LED lighting etc. LED light bulb, which may contain exposed heat dissipating metallic material, can also use the device with proper isolation measures.
Points to Note
Question 1
How do I design the power supply for the HT7L4091VIN?
Answer
1. The voltage must be within 17~22V when activated.
2. The voltage must be within 12~22V during operation.
3. If the applied voltage is greater than 22V, then it must not be applied directly to the HT7L4091, as a current limiting resistor must be added.
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