LP8862-Q1 datasheet(24/37 Pages) TI1

Part #	LP8862-Q1

Description	High-Performance 2-Channel LED Driver

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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24 / 37 page

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D001

VIN=5V

VIN=8V

VIN=12V

VIN=16V

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D001

VIN=5V

VIN=8V

VIN=12V

VIN=16V

40ms/div

VDDIO/EN 5 V/div

SD 2V/div

VBOOST 10V/div

IBOOST 200mA/div

LP8862-Q1

SNVSA75A – NOVEMBER 2015 – REVISED NOVEMBER 2015

www.ti.com

8.2.1.3 Application Curves

ƒSW = 300 kHz

VIN = 10 V

Brightness PWM 50% 100 Hz

Open string connected to OUT1

Figure 20. Typical Start-Up

Figure 21. Open LED Fault

Two strings, 8 LEDs per string

ƒSW = 400 kHz

Two strings, 8 LEDs per string

fSW = 400 kHz

160 mA/string for VIN = 12 V and VIN = 16 V

130 mA/string for VIN = 8 V

90 mA/string for VIN = 5 V

Figure 22. Boost Efficiency

Figure 23. System Efficiency

24

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