Texas Instruments LP5812 RGB LED Drivers

Texas Instruments LP5812 RGB LED Drivers are 4 x 3 matrix drivers with I²C and autonomous animation engine control. These drivers generate a 6MHz clock signal and use it to synchronize the lighting effects among multiple devices. The LP5812 drivers feature individual LED dot open/short detection and integrated de-ghosting function. These LED drivers operate at a 2.7V to 5.5V voltage range and a -40°C to 85°C temperature range. The LP5812 drivers are ideal for portable and wearable, gaming and home entertainment, Internet-of-Things (IoT), networking, and industrial HMI.

The LP5812 RGB LED drivers with an autonomous animation engine feature can significantly reduce the real-time loading of the controller. These drivers offer 0.4mA typical ultra-low regular operation current when illuminating LEDs. The LP5812 drivers offer four different material versions with different I²C chip addresses. These drivers support both analog dimming and PWM dimming.

Features

Autonomous animation engine control
Individual LED dot open/short detection
Integrated de-ghosting function
1MHz (maximum) I²C interface

-40°C to 85°C operating temperature range
PWM dimming up to audible-noise-free 24kHz frequency:
- Individual 8-bit PWM dimming resolution
- Linear or exponential dimming curves

Specifications

Operating voltage ranges:
- 2.7V to 5.5V V_CC range
- Logic pins compatible with 1.8V, 3.3V, and 5V voltages
4 constant current sinks with high precision:
- 0.1mA to 51mA per current sink
- Maximum ±5% device-to-device error
- Maximum ±5% channel-to-channel error
- 110mV (typical) @ 25.5mA and 210mV (typical) @ 51mA ultra-low headroom voltage
- PWM phase shift configurable for each LED
Analog dimming (current gain control):
- 25.5mA or 51mA global 1-bit Maximum Current (MC)
- Individual 8-bit Dot Current (DC) setting

Time-Cross-Multiplexing (TCM) topology:
- Drives up to 12 LEDs or 4 RGB LEDs
- ¼, ⅓, ½, and 1 multiplexing ratio
- Supports direct, TCM, and mix-drive modes
Ultra-low power consumption:
- Standby: I_STB = 26μA (typical) when CHIP_EN = 0 (data retained)
- Active: I_NOR = 0.4mA (typical) when LED current = 25.5mA

Applications

Portable and wearable electronics:
- Earbud and charging case, E-cigarette, and smart watch
Gaming and home entertainment:
- Smart speaker, RGB mouse, VR headset, and controller
Internet-of-Things (IoT):
- E-tag and video doorbell

Networking:
- Router and access point
Industrial HMI:
- EV charger and factory automation