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LP5569 데이터시트(PDF) 82 Page - Texas Instruments

부품명 LP5569
상세설명  LP5569 Nine-Channel I2C RGB LED Driver With Engine Control and Charge Pump
PDF  93 Pages
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
Logo TI2 - Texas Instruments

LP5569 데이터시트(HTML) 82 Page - Texas Instruments

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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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