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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LP55231 Datenblatt(PDF) 46 Page - Texas Instruments |
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LP55231 Datenblatt(HTML) 46 Page - Texas Instruments |
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46 / 59 page  LP55231 D1 D2 D3 D4 D5 D7 D8 D6 D9 VOUT COUT1 1 µF C2 0.47 µF ASEL0 ASEL1 GND MCU SCL SDA CLK TRIG INT CIN1 1 µF VIN = 2.7 V to 5.5 V VDD C1 0.47 µF C1+ C1- C2+ C2- R1 R B G R B G G LP55231 D1 D2 D3 D4 D5 D7 D8 D6 D9 VOUT COUT2 1 µF C4 0.47 µF CIN2 1 µF VDD C3 0.47 µF C1+ C1- C2+ C2- R B G R B G R B G VIO R2 R3 R4 EN SCL SDA CLK TRIG INT EN ASEL0 ASEL1 GND VIO R B G VIN Copyright © 2016, Texas Instruments Incorporated 46 LP55231 SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016 www.ti.com Product Folder Links: LP55231 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LP55231 enables up to four parallel devices together, which can drive up to 12 RGB LEDs or 36 single LEDs. Figure 27 shows the connections for two LP55231 devices for six RGB LEDs. Note that D7, D8, and D9 outputs are used for the red LEDs. The SCL and SDA lines must each have a pullup resistor placed somewhere on the line (R3 and R4; the pullup resistors are normally located on the bus master.). In typical applications, values of 1.8 kΩ to 4.7 kΩ are used, depending on the bus capacitance, I/O voltage, and the desired communication speed. INT and TRIG are open-drain pins, which must have pullup resistors. Typical values for R1 and R2 are from 120 kΩ to 180 kΩ for two devices. 8.2 Typical Applications 8.2.1 Using Two LP55231 in the Same Application Figure 27. LP55231 Typical Application |
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