LM3530
- Drives up to 11 LEDs in series
- 1000:1 Dimming Ratio
- 90% Efficient
- Programmable Dual Ambient Light Sensor Inputs
with Internal ALS Voltage Setting Resistors - I2C Programmable Logarithmic or
Linear Brightness Control - External PWM Input for Simple Brightness
Adjustment - True Shutdown Isolation for LEDs and Ambient
Light Sensors - Internal Soft-Start Limits Inrush Current
- Wide 2.7-V to 5.5-V Input Voltage Range
- 40-V and 25-V Overvoltage Protection Options
- 500-kHz Fixed Frequency Operation
- 839-mA Peak Current Limit
The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.
The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.
The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.
The LM3530 operates over the −40°C to 85°C temperature range.
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 | LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. L) | PDF | HTML | 2014/12/23 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | Analog PWM Dimming in White-LED Drivers | 2016/12/21 | ||||
| 應用說明 | Inductor Selection in Boost Converters for LCD Backlight Applications | 2016/10/24 | ||||
| 應用說明 | Schottky Diode Selection in Asynchronous Boost Converters | 2016/9/6 | ||||
| 使用指南 | AN-1991 LM3530 Evaluation Kit (Rev. A) | 2013/4/30 |
設計與開發
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LM3530SW-LINUX — 適用於 LM3530 的 Linux 驅動程式
The Linux driver supports the LM3530 White LED Driver. 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:
- lm3530
Linux Source Files
The files (...)
SNVC045 — LM3530 Graphical User Interface
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 12 | Ultra Librarian |
| DSBGA (YFZ) | 12 | Ultra Librarian |
訂購與品質
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。