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LP8861QPWPRQ1 Datasheet(PDF) 4 Page - Texas Instruments |
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LP8861QPWPRQ1 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 43 page LP8861-Q1 SNVSA50A – AUGUST 2015 – REVISED NOVEMBER 2015 www.ti.com Pin Functions PIN TYPE(1) DESCRIPTION NUMBER NAME 1 VIN P Input power pin as well as the positive input for an optional current sense resistor. Output of internal LDO; connect a 1- μF decoupling capacitor between this pin and noise-free 2 LDO A ground. 3 FSET A Boost/SEPIC switching frequency setting resistor. 4 VDDIO/EN I Enable input for the device as well as supply input (VDDIO) for digital pins Fault signal output. 5 FAULT OD If unused, the pin may be left floating. Input for synchronizing boost/SEPIC. 6 SYNC I In synchronization is not used, connect this pin to GND to disable spread spectrum or to VDDIO/EN to enable spread spectrum. 7 PWM I PWM dimming input. Input for NTC bridge. 8 TSENSE A If unused, the pin may be left floating. Input for NTC bridge. 9 TSET A This pin must be connected to GND if not used. 10 ISET A LED current setting resistor 11 GND G Ground. Current sink output. 12 OUT4 A This pin must be connected to GND if not used. Current sink output. 13 OUT3 A This pin must be connected to GND if not used. Current sink output. 14 OUT2 A This pin must be connected to GND if not used. Current sink output. 15 OUT1 A This pin must be connected to GND if not used. 16 FB A Boost/SEPIC feedback input. 17 PGND G Boost/SEPIC power ground. 18 SW A Boost/SEPIC switch pin. Power-line FET control. 19 SD A If unused, the pin may be left floating. Input current sense pin. Connect to VIN pin when optional input current sense resistor is not 20 VSENSE_N A used. (1) A: Analog pin, G: Ground pin, P: Power pin, I: Input pin, I/O: Input/Output pin, O: Output pin, OD: Open Drain pin 4 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: LP8861-Q1 |
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