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LP55231 Fiches technique(PDF) 1 Page - Texas Instruments |
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LP55231 Fiches technique(HTML) 1 Page - Texas Instruments |
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1 / 59 page  LP55231 D1 D2 D4 D7 VOUT COUT1 µF C2 0.47 µF ASEL0 ASEL1 GND MCU SCL SDA EN CLK TRIG INT CIN 1 µF VIN = 2.7 V to 5.5 V VDD C1 0.47 µF C1+ C1- C2+ C2- B G R D3 D8 B G R B G R D6 D5 D9 LP55231 D2 D3 D1 VOUT COUT1 µF C2 0.47 µF ASEL0 ASEL1 GND MCU SCL SDA EN CLK TRIG INT CIN 1 µF VIN = 2.7 V to 5.5 V VDD C1 0.47 µF C1+ C1- C2+ C2- D6 D5 D4 D9 D8 D7 RGB LED APPLICATION WLED APPLICATION NOTE: D7, D8 and D9 powered directly from VIN Copyright © 2016, Texas Instruments Incorporated Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LP55231 SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016 LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN 1 1 Features 1 • Three Independent Program Execution Engines, 9 Programmable Outputs With 25.5-mA Full-Scale Current, 8-Bit Current Setting Resolution and 12-Bit PWM Control Resolution • Adaptive High-Efficiency 1×/1.5× Fractional Charge Pump - Efficiency up to 94% • LED Drive Efficiency Up to 93% • Charge Pump With Soft Start • Overcurrent and Short-Circuit Protection • Built-in LED Test • 200-nA Typical Standby Current • Automatic Power Save Mode; IVDD = 10 µA (Typical) • Two-Wire I2C-Compatible Control Interface • Flexible Instruction Set • Large SRAM Program Memory • Small Application Circuit • Source (High-Side) Drivers • Architecture Supports Color Control 2 Applications • Fun Lights and Indicator Lights • LED Backlighting • Haptic Feedback • Programmable Current Source • Fire Notification • Electronic Thermostats • Electronic Locks • Robotics • Intruder Notification • Light Switches and Dimmers • Gaming and Smart Headphones • Speakers 3 Description The LP55231 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high- efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The LP55231 has an I2C-compatible control interface with four pin-selectable addresses. The INT pin can be used to notify processor when a lighting sequence has ended (interrupt function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP55231 devices. Excellent efficiency is maintained over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. The device is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typical). Only four small and low-cost ceramic capacitors are required. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LP55231 WQFN (24) 4.00 mm × 4.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. space space Typical Application |
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