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ST2225A-SS3 Scheda tecnica(PDF) 8 Page - List of Unclassifed Manufacturers |
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ST2225A-SS3 Scheda tecnica(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 12 page ST2225A 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. LED Display Driver -7- Version:A.025 Note that a complete set of 36 clocks must be sent in order to clear the shift registers. When ST2225A is powered ON, reset signal is generated internally to reset all registers and all latches. Then, the START bit and the first clock make it return to its normal operation. Figure 2 shows the pin-out of the package for ST2225A. Figure 3 shows the pad-assignment of the bare chip for ST2225A.The timing relationships between data, clock and DATA ENABLE is shown in Figure 4, with maximum clock frequency of 0.5 MHz assumed. When this driver is used for applications with lesser number of outputs, the current per output can be increased, or the part can be operated at higher than 1V (Vout). The following equation can be used for calculations. Tj = (Vout) (ILED) (NO. of segments) (82℃/W)+TA Where: Tj = junction temperature (150℃ max) Vout = the voltage at the LED driver outputs ILED = the LED current 82℃/W = thermal resistance of the package TA = ambient temperature The above equation was used to plot Figure 6-8. CLOCK DATA DATA ENABLE 300 nS MIN 100 nS MIN Figure 4 |
Codice articolo simile - ST2225A-SS3 |
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