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Introduction, characteristics, and applications of Texas Instruments LP5812 RGB LED driver

2/14/2024 9:10:15 AM

Summary: 4×3 matrix LED driver with I2C and autonomous animation engine control.

LP5812 Texas Instruments

The Texas Instruments LP5812 RGB LED driver is a 4 × 3 matrix driver with I(2)C and autonomous animation engine control. These drivers generate a 6MHz clock signal and use it to synchronize lighting effects between multiple devices. The LP5812 driver features individual LED on/short detection and integrated deghosting functionality. These LED drivers operate from a voltage range of 2.7V to 5.5V and a temperature range of -40°C to 85°C. The LP5812 driver is ideal for portable and wearables, gaming and home entertainment, Internet of Things (IoT), networking and industrial HMI.

The LP5812 RGB LED driver with autonomous animation engine function can significantly reduce the real-time load on the controller. These drivers provide a typical ultra-low regular operating current of 0.4mA when illuminating the LED. The LP5812 driver is available in four different material versions with different I(2)C chip addresses.


characteristic

  • Autonomous animation engine control

  • Single LED on/short detection

  • Integrated anti-ghosting function

  • 1MHz (maximum) I(2)C interface

  • Working temperature range -40℃~85℃

  • PWM dimming to noise-free 24kHz frequency;

    • Individual 8-bit PWM dimming resolution

    • Linear or exponential dimming curve


specification

  • Working voltage range:

    • 2.7V to 5.5VV(CC) range

    • Logic pins compatible with 1.8V, 3.3V and 5V voltages

  • 4 high-precision constant current sinks;

    • 0.1mA to 51mA per current receiver

    • Maximum ±5% inter-device error

    • Maximum ±5% channel-to-channel error

    • 110mV (typ) @ 25.5mA and 210mV (typ) @ 51mA ultra-low headroom voltage

    • PWM phase shift configurable for each LED

  • Analog dimming (current gain control)

    • 25.5mA or 51mA global 1-digit maximum current (MC)

    • Individual 8-bit point current (DC) setting

  • Time Crossed Multiplexing (TCM) topology:

    • Drive up to 12 LEDs or 4 RGB LEDs

    • 1/4, 1/3, 1/2 and 1 multiplex ratios

    • Supports direct drive, TCM and hybrid drive methods

  • Ultra-low power consumption:

    • Standby: ISTB = 26μA (typ) when CHIP_EN = 0 (data retained)

    • Valid: When LED current = 25.5mA, INOR = 0.4mA (typ)


app

  • Portable and Wearable Electronics:

    • Earphones and charging cases, electronic cigarettes, smart watches

  • Games and Home Entertainment:

    • Smart speakers, RGB mice, VR headsets and controllers

  • Internet of Things (Internet of Things):

    • Electronic tags and video doorbells

  • network:

    • Routers and access points

  • Industrial human-machine interface:

    • Electric vehicle chargers and factory automation

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