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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LP5569ARTWR датащи(PDF) 82 Page - Texas Instruments |
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LP5569ARTWR датащи(HTML) 82 Page - Texas Instruments |
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82 / 93 page  82 LP5569 SNVSAP8A – JULY 2017 – REVISED SEPTEMBER 2017 www.ti.com Product Folder Links: LP5569 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 9.2.2.1 Design Requirements DESIGN PARAMETER EXAMPLE VALUE Input voltage range 2.5 V to 5.5 V LED VF (maximum) 3.2 V LED current 25.5 mA maximum Input capacitor CIN = 1 µF Output capacitor COUT= 1 µF Charge pump flying capacitors CFLY1 = CFLY2 = 1 µF Charge-pump mode 1.5× or automatic 9.2.2.2 Detailed Design Procedure External component selection follows the earlier example (see Detailed Design Procedure). 9.2.2.3 Application Curves Figure 123. Line Transient of the Riasing Edge in Charge- Pump Auto Mode Figure 124. Line Transient of the Falling Edge in Charge- Pump Auto Mode 10 Power Supply Recommendations The device is designed to operate from a VVIN input-voltage supply range between 2.5 V and 5.5 V. This input supply must be well-regulated and able to withstand maximum input current and maintain stable voltage without voltage drop even in a load-transition condition (start-up or rapid brightness change). The resistance of the input supply rail must be low enough that the input-current transient does not cause a drop below 2.5-V in the LP5569 VVIN supply voltage. |
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