LP5018 (PREVIEW)

LP5018 18-Channel I2C Constant-Current RGB LED Driver

LP5018 18-Channel I2C Constant-Current RGB LED Driver - LP5018
 

Sample Availability

Prototype samples are available (PLP5018RSMR). Request Now

Description

In smart homes and other human-machine-interaction LED-driver applications, the performance demand for multi-channel RGB LED drivers is increasing to achieve great user experiences like blinking, breathing, and chasing LED-animation effects.

The LP50xx device is an 18- or 24-channel constant-current-sink LED driver. The LP50xx device improves the user experience in color mixing and brightness control, from both live effects and coding efforts. The optimized performance for RGB LEDs makes it a potential choice for human-machine-interaction applications.

The LP50xx device controls each LED output with a 12-bit PWM resolution at 29-kHz switching frequency, which helps achieve a smooth dimming effect and eliminates audible noise. The independent color mixing and brightness control registers make the software coding straightforward. When targeting a fade-in, fade-out type breathing effect, the global R, G, B bank control reduces the microcontroller loading significantly. The LP50xx device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.

The LP50xx device implements an automatic power-saving mode to achieve ultralow quiescent current. When channels are all off for 30 ms, the device total power consumption is down to 10 µA, which makes the LP50xx device a potential choice for battery-powered end-equipments.

Features

  • 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-to-Channel Error: ±7%
  • Ultralow Quiescent Current:
    • Shutdown Mode: 1 µA (Max.) With EN Low
    • Power Saving Mode: 10 µA (Typ.) 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

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Parametrics Compare all products in RGB & White LED Driver

 
Channels (#)
LED Current Per Channel (mA)
LED Configuration
LED (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Iq (Typ) (mA)
Shutdown Current (Typ) (uA)
Features
Operating Temperature Range (C)
Pin/Package
LP5018 LP5024
18    24   
35    35   
Parallel    Parallel   
18    24   
2.7    2.7   
5.5    5.5   
2.7    2.7   
5.5    5.5   
0.63    0.84   
0.01    0.01   
0.2    0.2   
Constant Current
Current Control
I2C Control
Power Save Mode   
Constant Current
Current Control
I2C Control
Power Save Mode   
-40 to 125    -40 to 85   
32VQFN    32VQFN