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LP5018, LP5024
SLVSEB8B – OCTOBER 2018 – REVISED OCTOBER 2018
LP50xx 18-, 24-Channel, 12-Bit, PWM Ultralow-Quiescent-Current, I2C RGB LED Drivers
1 Features
•1 Operating Voltage Range:
– VCC Range: 2.7 V to 5.5 V – EN, SDA, and SCL Pins Compatible With
1.8-V, 3.3-V, and 5-V Power Rails
– Output Maximum Voltage: 6 V
• 24 Constant-Current Sinks With High Precision
– 25.5 mA Maximum per Channel With VCC in Full Range
– 35 mA Maximum per Channel When VCC ≥ 3.3 V
– Device-to-Device Error: ±7%; Channel-toChannel Error: ±7%
• Ultralow Quiescent Current:
– Shutdown Mode: 1 µA (Maximum) With EN Low
– Power Saving Mode: 10 µA (Typical) With EN High and All LEDs Off for > 30 ms
• Integrated 12-Bit, 29-kHz PWM Generator for Each Channel:
– Independent Color-Mixing Register Per Channel
– Independent Brightness-Control Register Per RGB LED Module
– Optional Logarithmic- or Linear-Scale Brightness Control
– Integrated 3-Phase PWM-Shifting Scheme
• 3 Programmable Banks (R, G, B) for Easy Software Control of Each Color
• 2 External Hardware Address Pins Allow Connecting up to 4 Devices
• Broadcast Slave Address Allows Configuring Multiple Devices Simultaneously
• Auto-Increment Allows Writing or Reading Consecutive Registers Within One Transmission
• Up to 400-kHz Fast-Mode I2C Speed
2 Applications
LED Lighting, Indicator Lights, and Fun Lights for:
• Smart Speaker (With Voice Assistant) • Smart Home Appliances • Video Doorbell • Electronic Smart Lock • Smoke and Heat Detector • STB and DVR • Smart Router • Handheld Device
3 Description
In smart homes and other applications that utilize human-machine-interaction, high-performance RGB LED drivers are required. LED animation effects such as flashing, breathing, and chasing greatly improve user experience, and minimal system noise is essential.
The LP50xx device is an 18- or 24-channel constant current sink LED driver. The LP50xx device includes integrated color mixing and brightness control, and pre-configuration simplifies the software coding process. Integrated 12-bit, 29 kHz PWM generators for each channel enable smooth, vivid color for LEDs, and eliminate audible noise.
PART NUMBER LP5018 LP5024
Device Information(1)
PACKAGE
BODY SIZE (NOM)
VQFN (32)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
MCU
Simplified Schematic
VMCU
VCC
CVCC
CVCAP RIREF
EN SDA SCL ADDR0 ADDR1
VCAP
VCC
LP5024
OUT0 OUT1 OUT2
OUT21
IREF
GND
OUT22 OUT23
VLED
1
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.
LP5018, LP5024
SLVSEB8B – OCTOBER 2018 – REVISED OCTOBER 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Description (continued)......................................... 3 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6 7.2 ESD Ratings.............................................................. 6 7.3 Recommended Operating Conditions....................... 6 7.4 Thermal Information .................................................. 6 7.5 Electrical Characteristics........................................... 7 7.6 Timing Requirements ................................................ 8 7.7 Typical Characteristics .............................................. 9 8 Detailed Description ............................................ 11 8.1 Overview ................................................................. 11 8.2 Functional Block Diagram ....................................... 11 8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 17 8.5 Programming .......................................................... 18 8.6 Register Maps ........................................................ 22 9 Application and Implementation ........................ 38 9.1 Application Information............................................ 38 9.2 Typical Application ................................................. 38 10 Power Supply Recommendations ..................... 41 11 Layout................................................................... 41 11.1 Layout Guidelines ................................................. 41 11.2 Layout Examples.................................