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LP5861T

現行

具 8 位元類比和 8 位元或 16 位元 PWM 調光的 18 通道高電流 RGB LED 驅動器

產品詳細資料

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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類型 標題 日期
* 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 2023年 8月 9日
Certificate LP5861TEVM EU Declaration of Conformity (DoC) 2023年 6月 30日

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開發板

LP5861TEVM — 適用於 18 通道高電流 LED 驅動器的 LP5861T 評估模組

LP5861T 評估模組展示了 LP5861T LED 矩陣驅動器的所有功能。LP586x 圖形使用者介面 (GUI) 用於透過 USB2ANY 介接至 EVM。EVM 具有透過 USB2ANY 介面轉接器的 SPI 與 I2C 輸入。
使用指南: PDF | HTML
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VQFN (RSM) 32 Ultra Librarian

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