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LP5861T

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Controlador LED RGB de alta corriente de 18 canales con regulación analógica de 8 bits y PWM de 8

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LP5861T

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Detalles del producto

Number of channels 18 LED current per channel (mA) 120 LED configuration Matrix Program memory Yes Topology Linear Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2.25 Features Analog/PWM mixed dimming, Constant current, Enable/Shutdown, LED Open Detection, LED Short Detection, SPI/I2C, Thermal shutdown Iq (typ) (mA) 4.3 Shutdown current (ISD) (typ) (µA) 1 Operating temperature range (°C) -55 to 125 Rating Catalog
Number of channels 18 LED current per channel (mA) 120 LED configuration Matrix Program memory Yes Topology Linear Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2.25 Features Analog/PWM mixed dimming, Constant current, Enable/Shutdown, LED Open Detection, LED Short Detection, SPI/I2C, Thermal shutdown Iq (typ) (mA) 4.3 Shutdown current (ISD) (typ) (µA) 1 Operating temperature range (°C) -55 to 125 Rating Catalog
VQFN (RSM) 32 16 mm² 4 x 4
  • Operating voltage range:
    • V CC/V LED range: 2.7 V to 5.5 V
    • Logic pins compatible with 1.8 V, 3.3 V, and 5 V
  • 18 high current and precision constant current sinks:
    • 125-mA per current sink when V CC ≥ 3.3 V
    • Device-to-device error: ±5%
    • Channel-to-channel error: ±5%
    • Phase-shift for balanced transient power
  • Ultra-low power consumption:
    • Shutdown mode: I CC ≤ 2 µA when EN = Low
    • Standby mode: I CC ≤ 10 µA when EN = High and CHIP_EN = 0 (data retained)
    • Active mode: I CC = 5 mA (typical) when channel current = 12.5 mA
  • Flexible dimming options:
    • Individual ON/OFF control for each LED dot
    • Analog dimming (current gain control)
      • Global 3-bit Maximum Current (MC) setting for all LED dots
      • 3 groups of 7-bit Color Current (CC) setting for red, green, and blue
      • Individual 8-bit Dot Current (DC) setting for each LED dot
    • PWM dimming with audible-noise-free frequency
      • Global 8-bit PWM dimming for all LED dots
      • 3 programmable groups of 8-bit PWM dimming for LED dot arbitrary mapping
      • Individual 8-bit or 16-bit PWM dimming for each LED dot
  • Full addressable SRAM to minimize data traffic
  • Individual LED dot open and short detection
  • Deghosting and low brightness compensation
  • Interface options:
    • 1-MHz (max.) I 2C interface when IFS = Low
    • 12-MHz (max.) SPI interface when IFS = High
  • Operating voltage range:
    • V CC/V LED range: 2.7 V to 5.5 V
    • Logic pins compatible with 1.8 V, 3.3 V, and 5 V
  • 18 high current and precision constant current sinks:
    • 125-mA per current sink when V CC ≥ 3.3 V
    • Device-to-device error: ±5%
    • Channel-to-channel error: ±5%
    • Phase-shift for balanced transient power
  • Ultra-low power consumption:
    • Shutdown mode: I CC ≤ 2 µA when EN = Low
    • Standby mode: I CC ≤ 10 µA when EN = High and CHIP_EN = 0 (data retained)
    • Active mode: I CC = 5 mA (typical) when channel current = 12.5 mA
  • Flexible dimming options:
    • Individual ON/OFF control for each LED dot
    • Analog dimming (current gain control)
      • Global 3-bit Maximum Current (MC) setting for all LED dots
      • 3 groups of 7-bit Color Current (CC) setting for red, green, and blue
      • Individual 8-bit Dot Current (DC) setting for each LED dot
    • PWM dimming with audible-noise-free frequency
      • Global 8-bit PWM dimming for all LED dots
      • 3 programmable groups of 8-bit PWM dimming for LED dot arbitrary mapping
      • Individual 8-bit or 16-bit PWM dimming for each LED dot
  • Full addressable SRAM to minimize data traffic
  • Individual LED dot open and short detection
  • Deghosting and low brightness compensation
  • Interface options:
    • 1-MHz (max.) I 2C interface when IFS = Low
    • 12-MHz (max.) SPI interface when IFS = High

The LP5861T is a high-current and high-performance LED matrix driver. The device integrates 18 constant current sinks with N (N = 6/8/11) switching MOSFETs to support N × 18 LED dots or N × 6 RGB LEDs. The LP5861T is the direct driving version to support 18 LED dots or 6 RGB LEDs.

The LP5861T supports both analog dimming and PWM dimming methods. For analog dimming, each LED dot can be adjusted with 256 steps. For PWM dimming, the integrated 8-bit or 16-bit configurable PWM generators enable smooth and audible-noise-free dimming control. Each LED dot can also be arbitrarily mapped into 8-bit Group PWM to achieve dimming control together.

The LP5861T device implements full addressable SRAM to minimize the data traffic. The ghost-cancellation circuitry is integrated to eliminate both upside and downside ghosting. The LP5861T also supports LED open and short detection functions. Both 1-MHz (maximum) I 2C and 12-MHz (maximum) SPI are available in LP5861T.

The LP5861T is a high-current and high-performance LED matrix driver. The device integrates 18 constant current sinks with N (N = 6/8/11) switching MOSFETs to support N × 18 LED dots or N × 6 RGB LEDs. The LP5861T is the direct driving version to support 18 LED dots or 6 RGB LEDs.

The LP5861T supports both analog dimming and PWM dimming methods. For analog dimming, each LED dot can be adjusted with 256 steps. For PWM dimming, the integrated 8-bit or 16-bit configurable PWM generators enable smooth and audible-noise-free dimming control. Each LED dot can also be arbitrarily mapped into 8-bit Group PWM to achieve dimming control together.

The LP5861T device implements full addressable SRAM to minimize the data traffic. The ghost-cancellation circuitry is integrated to eliminate both upside and downside ghosting. The LP5861T also supports LED open and short detection functions. Both 1-MHz (maximum) I 2C and 12-MHz (maximum) SPI are available in LP5861T.
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Documentación técnica

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* Data sheet LP5861T 18-Channel High-Current LED Driver with 8-Bit Analog and 8-Bit or 16-Bit PWM Dimming datasheet (Rev. A) PDF | HTML 09 ago 2023
Certificate LP5861TEVM EU Declaration of Conformity (DoC) 30 jun 2023

Diseño y desarrollo

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Placa de evaluación

LP5861TEVM — Módulo de evaluación LP5861T para controlador LED de alta corriente de 18 canales

El módulo de evaluación LP5861T muestra todas las características del controlador de matriz LED LP5861T. La interfaz gráfica de usuario (GUI) LP586x se utiliza para conectarse con USB2ANY al EVM. El EVM tiene entradas SPI e I2C a través del adaptador de interfaz USB2ANY.
Guía del usuario: PDF | HTML
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