Figure 6-9 shows the structure of a dedicated multi-pattern LED string control ASIC HJ94030 and its typical application circuit diagram. It has an idea output, and a button control can select different variations of the pattern.
HJ94030's function: HJ94030 is packaged in black paste, Figure 6-9(a) is the chip pressure point distribution diagram, which can be made into soft seal substrates of various shapes and sizes according to customers' needs. Its 10 external pin functions are as follows: 1 pin VSS, power supply negative terminal; 9th pin VDD, power supply positive terminal; 2~5 pins are L1~L4, four input terminals. It can trigger the thyristor to drive the lantern to shine.
Typical application circuit: Figure 6-9(b) is its typical application circuit. The required operating voltage of the integrated block is 75K Euro step-down current limiting, 3.9V Zener voltage regulator supply, SB is conductive rubber button switch, used to select The color string H1~H4 is shining, and each change can be used to select one variation pattern. There are 7 different patterns to choose from.
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Guangzhou Cheng Wen Photoelectric Technology Co., Ltd. , https://www.cwledwall.com