LP5861T
- 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.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 날짜 |
|---|---|---|---|---|
| * | 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 | 2023/08/09 |
| Certificate | LP5861TEVM EU Declaration of Conformity (DoC) | 2023/06/30 |
설계 및 개발
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LP5861TEVM — 18채널 고전류 LED 드라이버용 LP5861T 평가 모듈
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