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Texas Instruments LP5861 18-Ch RGB LED Driver

Texas Instruments LP5861 18-Ch RGB LED Driver is designed for an improved user experience of animation and indication purposes in a LED matrix with a small solution size. The LP5861 integrates 18 constant current sinks with N (N = 1/2/4/6/8/11), switching MOSFETs to support N × 18 LED dots or N × 6 RGB LEDs. The LP5861 integrates 1 MOSFET for up to 18 LED dots or 6 RGB LEDs.

The TI LP5861 18-Ch RGB LED Driver supports analog and PWM dimming methods. The device can adjust each LED dot with 256 steps for analog dimming. For PWM dimming, the integrated 8-bit or 16-bit configurable PWM generators provide smooth and audible noise-free dimming control. Each LED dot can also be arbitrarily mapped into an 8-bit group PWM to achieve dimming control simultaneously.

The LP5861 LED Driver implements full addressable SRAM to minimize the data traffic. The ghost cancellation circuitry is integrated to eliminate both upside and downside ghosting. The LP5861 also delivers LED open and short detection functions.

The LP5861 LED Driver is available in a 4mm × 4mm 32-VQFN package with a 1MHz (maximum) I²C or a 12MHz (maximum) SPI interface.

Features

Operating voltage range:
- 2.7V to 5.5V V_CC/VL_ED range
- Logic pins are compatible with 1.8V, 3.3V, and 5V
18 constant current sinks with high precision:
- 0.1mA to 50mA per current sink when V_CC ≥ 3.3V
- ±5% Device-to-device error
- ±5% Channel-to-channel error
- Phase-shift for balanced transient power
Ultra-low power consumption:
- I_CC ≤ 2uA when EN = Low shutdown mode
- I_CC ≤ 10uA when EN = High and CHIP_EN = 0 (data retained) standby mode
- I_CC = 3mA (typ.) when channel current = 5mA Active mode
Full addressable SRAM to minimize data traffic
Interface options:
- 1MHz (max.) I²C interface when IFS = Low
- 12MHz (max.) SPI interface when IFS = High

Flexible dimming options:
- Individual ON and 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) settings 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
Deghosting and low brightness compensation
Individual LED dot open and short detection

Applications

LED animation and indication for:
- Keyboard, mouse, and gaming accessories
- Major and smart home appliances
- Smart speaker, wired and wireless speaker
- Audio mixer, DJ equipment, and broadcast
- Access equipment, switches, and servers
- Constant current sinks for optical module

Texas Instruments LP5861 18-Ch RGB LED Driver

Features

Applications

Simplified Schematic

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