LP5868T
-
LED matrix topology:
- 18 constant current sinks with 8 scan switches for 144 LED dots
- Configurable for 1 to 8 scan switches
- Operating voltage range:
- VCC/VLED range: 2.7V to 5.5V
- Logic pins compatible with 1.8V, 3.3V, and 5V
- 18 constant current sinks with
high precision:
- 100mA per current sink when VCC ≥ 3.3V
- Device-to-device error: ±5%
- Channel-to-channel error: ±5%
- Phase-shift for balanced transient power
- Ultra-low power consumption:
- Shutdown mode: ICC ≤ 1µA when EN = Low
- Standby mode: ICC ≤ 10µA when EN = High and CHIP_EN = 0 (data retained)
- Active mode: ICC = 5mA (typ.) when channel current = 12.5mA
- Flexible dimming options:
- Individual ON/OFF control for each LED dot
- Analog dimming (current gain control)
- Global 7-step Maximum Current (MC) setting for all LED dots
- 3 groups of 7-bit Color Current (CC) RGB setting
- 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/short detection
- De-ghosting and low brightness compensation
- Interface options:
- 1MHz (max.) I2C interface when IFS = Low
- 12MHz (max.) SPI interface when IFS = High
The LP5868T 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 . The LP5868T integrates 8 MOSFETs for up to 144 LED dots or 48 RGB LEDs.
The LP5868T 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 LP5868T device implements full addressable SRAM to minimize the data traffic. The ghost-cancellation circuitry is integrated to eliminate both upside and downside ghosting. The LP5868T also supports LED open and short detection functions. Both 1MHz (maximum) I2C and 12MHz (maximum) SPI are available in LP5868T.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LP5868T 8 × 18 LED High-Current Matrix Driver with 8-Bit Analog and 8-Bit or 16-Bit PWM Dimming datasheet (Rev. B) | PDF | HTML | 2023/11/14 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RKP) | 40 | Ultra Librarian |
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