開發模組 (EVM) 的 GUI
LM3559
- Dual High-Side Current Sources Allow for Grounded Cathode LED Operation
- Accurate and Programmable LED Current from 28.125 mA to 1.8 A
- Optimized Flash Current During Low Battery Conditions
- Independent LED Current Source Programmability
- Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
- 4-Bit Analog-to-Digital (ADC) for VLED Monitoring
- Battery Voltage Sensing and Current Scale-Back
- LED Sensing and Current Scale-Back
- Hardware Flash and Torch Enable
- Active-Low Hardware Reset
- Dual Synchronization Inputs for RF Power Amplifier Pulse Events
- LED and Output Disconnect During Shutdown
- Open and Short LED Detection
- 400-kHz I2C-Compatible Interface
The LM3559 is a 2-MHz fixed-frequency synchronous boost converter with two 900-mA constant current drivers for high-current white LEDs. The dual high-side current sources allow for grounded cathode LED operation and can be tied together for providing flash currents of up to 1.8 A. An adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency.
The LM3559 is controlled via an I2C-compatible interface. Features include: an internal 4-bit ADC to monitor the LED voltage, independent LED current control, a hardware flash enable allowing a logic input to trigger the flash pulse, 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, an integrated comparator designed to monitor an NTC thermistor and provide an interrupt to the LED current, an input voltage monitor to monitor low battery conditions, and a flash current scale-back feature that actively monitors the battery voltage and optimizes the flash current during low battery-voltage conditions. Additionally, an active high HWEN input provides a hardware shutdown during system software failures.
The 2-MHz switching frequency, overvoltage protection, and adjustable current limit allow for the use of tiny, low-profile (1-µH or 2.2-µH) inductors and (10-µF) ceramic capacitors. The device is available in a ultra-small 16-pin DSBGA package (total solution size < 26 mm2) and operates over the –40°C to +85°C temperature range.
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 | LM3559 Synchronous Boost Flash Driver With Dual 900-mA High-Side Current Sources (1.8-A Total Flash Current) datasheet (Rev. B) | PDF | HTML | 2016年 6月 24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-2057 LM3559/LM3560 Evaluation Board (Rev. A) | 2013年 4月 30日 |
設計與開發
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開發板
LM3559EVAL — 適用於 LM3559 的評估板
The LM3559/LM3560 Evaluation Board is designed to fully evaluate the LM3559 and LM3560 Synchronous Boost Converter with dual 900mA High Side Flash LED Drivers (LM3559) or dual 1000mA High Side Flash Drivers (LM3560) and I2C-Compatible Interface.
使用指南: PDF
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| 封裝 | 引腳 | 下載 |
|---|---|---|
| DSBGA (YZR) | 16 | 檢視選項 |
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
- 資格摘要
- 進行中可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。