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LP5569 데이터시트(PDF) 17 Page - Texas Instruments

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부품명 LP5569
상세설명  Nine-Channel I2C RGB LED Driver With Engine Control and Charge Pump
PDF  86 Pages
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

LP5569 데이터시트(HTML) 17 Page - Texas Instruments

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PWM Frequency (kHz)
0.1
1
10
20
20
6
7
8
9
10
11
12
D001
Sample Frequency = 10 MHz
17
LP5569
www.ti.com
SNVSAP8 – JULY 2017
Product Folder Links: LP5569
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
Feature Description (continued)
Figure 9. PWM Resolution vs PWM Input Frequency
PWM Master Fader Hysteresis
To prevent jitter on the input PWM signal from feeding through the PWM path and causing oscillations in the LED
current, the LP5569 device offers seven selectable hysteresis settings. The hysteresis works by forcing a specific
number of 11-bit LSB code transitions to occur in the input duty cycle before the LED current changes. Table 1
describes the hysteresis. The hysteresis only applies during a change in direction of brightness currents. Once
the change in direction has taken place, the PWM input must overcome the required LSB(s) of the hysteresis
setting before the brightness change takes effect. Once the initial hysteresis has been overcome and the
direction in brightness change remains the same, the PWM-to-current response changes with no hysteresis.



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