開發模組 (EVM) 的 GUI
LM3554
- Input Voltage: 2.5 V to 5.5 V
- Programmable 4.5-V or 5-V Constant Output Voltage
- Dual High-Side Current Sources
- Grounded Cathode Allowing for Better Heat Sinking and LED Routing
- > 90% Efficiency
- Ultra-Small Solution Size: < 23 mm2
- Four Operating Modes: Torch, Flash, LED Indicator, and Voltage Output
- Accurate and Programmable LED Current from 37.5 mA to 1.2 A
- Hardware Flash and Torch Enable
- LED Thermal Sensing and Current Scaleback
- Software Selectable Input Voltage Monitor
- Programmable Flash Timeout
- Dual Synchronization Inputs for RF Power-Amplifier Pulse Events
- Open and Short LED Detection
- Active High Hardware Enable for Protection Against System Faults
- 400-kHz I2C-Compatible Interface
The LM3554 is a 2-MHz fixed-frequency, current-mode synchronous boost converter. The device is designed to operate as a dual 600-mA (1.2 A total) constant-current driver for high-current white LEDs, or as a regulated 4.5-V or 5-V voltage source.
The main features include: an I2C-compatible interface for controlling the LED current or the desired output voltage, a hardware flash enable input for direct triggering of the flash pulse, and dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions. Additionally, an active high hardware enable (HWEN) input provides a hardware shutdown during system software failures.
Five protection features are available within the LM3554 including a software selectable input voltage monitor, an internal comparator for interfacing with an external temperature sensor, four selectable current limits to ensure the battery current is kept below a predetermined peak level, an overvoltage protection feature to limit the output voltage during LED open circuits, and an output short circuit protection which limits the output current during shorts to GND.
For all available packages, see the orderable addendum at the end of the data sheet.技術文件
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檢視所有 4 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM3554 Synchronous Boost Converter With 1.2-A Dual High-Side LED Drivers and I2C-Compatible Interface datasheet (Rev. C) | PDF | HTML | 2016年 2月 26日 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| User guide | AN-1742 LM3554 Evaluation Board (Rev. B) | 2013年 7月 23日 |
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
LM3554TMEEV — 適用於 LM3554 的評估板
Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C-Compatible Interface
使用指南: PDF
驅動程式或資料庫
LM355XSW-LINUX — 適用於 LM355X 的 Linux 驅動程式
The Linux driver supports the LM355X 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:
- lm3554
- lm3556
Linux Source Files
(...)
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。
PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。
在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。
在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 16 | Ultra Librarian |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點