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LP55231

現行

具內部程序記憶體和整合式充電泵的 9 通道 RGB/白光 LED 驅動器 - WQFN

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LP5813 現行 具備 I2C 和自動動畫控制的同步升壓 4 x 3 矩陣 RGB LED 驅動器 Newer device with sync boost, lower IQ and smaller size

LP55231

現行
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產品詳細資料

Number of channels 9 LED current per channel (mA) 25.5 LED configuration Parallel Program memory Yes Topology Charge pump Programmable ramp control Yes Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.0255 Features Analog/PWM mixed dimming, Constant current, Current control, I2C control, Power-save mode, Programmable lighting engines Iq (typ) (mA) 0.8 Shutdown current (ISD) (typ) (µA) 0.2 Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 9 LED current per channel (mA) 25.5 LED configuration Parallel Program memory Yes Topology Charge pump Programmable ramp control Yes Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 0.0255 Features Analog/PWM mixed dimming, Constant current, Current control, I2C control, Power-save mode, Programmable lighting engines Iq (typ) (mA) 0.8 Shutdown current (ISD) (typ) (µA) 0.2 Operating temperature range (°C) -30 to 85 Rating Catalog
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • Three Independent Program Execution Engines, 9 Programmable Outputs With 25.5-mA Full-Scale Current, 8-Bit Current Setting Resolution and
    12-Bit PWM Control Resolution
  • Adaptive High-Efficiency 1×/1.5× Fractional Charge Pump - Efficiency up to 94%
  • LED Drive Efficiency Up to 93%
  • Charge Pump With Soft Start
  • Overcurrent and Short-Circuit Protection
  • Built-in LED Test
  • 200-nA Typical Standby Current
  • Automatic Power Save Mode; IVDD = 10 µA (Typical)
  • Two-Wire I2C-Compatible Control Interface
  • Flexible Instruction Set
  • Large SRAM Program Memory
  • Small Application Circuit
  • Source (High-Side) Drivers
  • Architecture Supports Color Control
  • Three Independent Program Execution Engines, 9 Programmable Outputs With 25.5-mA Full-Scale Current, 8-Bit Current Setting Resolution and
    12-Bit PWM Control Resolution
  • Adaptive High-Efficiency 1×/1.5× Fractional Charge Pump - Efficiency up to 94%
  • LED Drive Efficiency Up to 93%
  • Charge Pump With Soft Start
  • Overcurrent and Short-Circuit Protection
  • Built-in LED Test
  • 200-nA Typical Standby Current
  • Automatic Power Save Mode; IVDD = 10 µA (Typical)
  • Two-Wire I2C-Compatible Control Interface
  • Flexible Instruction Set
  • Large SRAM Program Memory
  • Small Application Circuit
  • Source (High-Side) Drivers
  • Architecture Supports Color Control

The LP55231 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control.

The LP55231 has an I2C-compatible control interface with four pin-selectable addresses. The INT pin can be used to notify processor when a lighting sequence has ended (interrupt function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP55231 devices. Excellent efficiency is maintained over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. The device is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typical). Only four small and low-cost ceramic capacitors are required.

For all available packages, see the orderable addendum at the end of the data sheet.

The LP55231 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control.

The LP55231 has an I2C-compatible control interface with four pin-selectable addresses. The INT pin can be used to notify processor when a lighting sequence has ended (interrupt function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP55231 devices. Excellent efficiency is maintained over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. The device is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typical). Only four small and low-cost ceramic capacitors are required.

For all available packages, see the orderable addendum at the end of the data sheet.

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技術文件

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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 LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN datasheet (Rev. D) PDF | HTML 2016/12/29
白皮書 Common LED Functions and LED Driver Design Considerations 2020/9/21
應用說明 How to Select a RGB LED Driver 2019/8/8
技術文章 How energy harvesting can extend the life of your fault indicator on the grid PDF | HTML 2017/10/18

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LP55231SQEVM — 可編程的 9 輸出 LED 驅動器評估模組板

Programmable 9-Output LED Driver Evaluation Module Board

The LP55231EVM demonstrates the flexibility and programability of LP55231 for dimming and sequencing control of LEDs.
使用指南: PDF
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無法提供
驅動程式或資料庫

LP5523SW-LINUX — 適用於 LP5523 的 Linux 驅動程式

The Linux driver supports the LP5523 series of LED Drivers. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lp5523
  • lp55231

 

Linux Source Files

(...)

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開發模組 (EVM) 的 GUI

SNVC132 — LP55231 Software

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參考設計

TIDA-00757 — 使用 4 節 AA 電池並可實現 5 年以上電池壽命的智慧鎖參考設計

隨著越來越多的建築物和住宅車主希望將智慧鎖（或電子鎖）改裝到大樓或住家，無線電池供電的智慧鎖在現今市場中也越來越受歡迎。  在智慧鎖應用中，高電流馬達和無線電通常會快速耗盡電池電力，造成電池續航力受損。  更換多個電池是一個耗時且昂貴的問題，因此降低平均耗電量通常是重要的設計考量。
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參考設計

TIDA-00998 — 適用於高架故障指示燈的能源採集和故障指示燈子系統參考設計

此參考設計展示了使用輔助電池或超級電容器，並從電流變壓器 (CT) 或太陽能電池收集能源以延長主要電池壽命的多種架構。最佳電源管理是利用有效率的 LED 驅動器來驅動 LED 串聯或並聯串，以控制強度實現一致的 360° 可見度。
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參考設計

TIDA-01067 — 具有壓力、濕度和溫度感測功能的智慧阻尼器控制參考設計

此參考設計旨在透過連線暖氣、通風與空調 (HVAC)，對多個房間的舒適性進行控制。藉由感測溫度、濕度及壓力，即可在每個區域中進行獨立監控與氣流調整。此參考設計可將定風量 (CAV) 轉換為變風量 (VAV) 系統。收集到的資料可透過無線方式傳輸至智慧型恆溫器或閘道。可採用板載感測器進行預測性維護、縮短技術故障排除時間，並減少整體能源消耗。長久的電池續航力讓智慧阻尼器能持續運作多年，無需花費時間與金錢更換電池。
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WQFN (RTW) 24 Ultra Librarian
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