LP5024

• Operating Voltage Range:
  • V_CC 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 V_CC in Full Range
  • 35 mA Maximum per Channel When V_CC ≥ 3.3 V
  • Device-to-Device Error: ±7%; Channel-to-Channel 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

All trademarks are the property of their respective owners.

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.

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 intensity 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 equipment.