4 × 18 LED matrix driver with 8-bit analog and 8-/16-bit PWM dimming

Electronic devices are becoming smarter,

requiring to use larger quantity of LEDs for animation and indication purposes and high

performance LED matrix driver is required to improve user experience with small solution

size.

The LP586x devices are a family of high performance LED matrix drivers. The device

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 LP5864 integrates 4 MOSFETs for up to 72 LED dots or

24 RGB LEDs.

The LP5864 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 LP5864 device implements full addressable SRAM

to minimize the data traffic. The ghost-cancellation circuitry is integrated to eliminate

both upside and downside ghosting. The LP5864 also supports LED open and short detection

functions. Both 1-MHz (maximum) I2C and 12-MHz (maximum) SPI are available in

LP5864.