LM3532
- Drives up to 3 Parallel High-Voltage LED Strings
at 40 V Each With up to 90% Efficiency - 0.4% Typical Current Matching Between Strings
- 256 Level Logarithmic and Linear Brightness
Control With 14-Bit Equivalent Dimming - I2C-Compatible Interface
- Direct Read Back of Ambient Light Sensor Via
8-bit ADC - Programmable Dual Ambient Light Sensor Inputs
With Internal Sensor Gain Selection - Dual External PWM Inputs for LED Brightness
Adjustment - Independent Current String Brightness Control
- Programmable LED Current Ramp Rates
- 40-V Overvoltage Protection
- 1-A Typical Current Limit
The LM3532 is a 500-kHz fixed frequency asynchronous boost converter which provides the power for 3 high-voltage, low-side current sinks. The device is programmable over an I2C-compatible interface and has independent current control for all three channels. The adaptive current regulation method allows for different LED currents in each current sink thus allowing for a wide variety of backlight and keypad applications.
The main features of the LM3532 include dual ambient light sensor inputs each with 32 internal voltage setting resistors, 8-bit logarithmic and linear brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with programmable fade in and fade out settings.
The LM3532 is available in a 16-pin, 0.4-mm pitch thin DSBGA package. The device operates over a 2.7-V to 5.5-V input voltage range and the −40°C to +85°C temperature range.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. E) | PDF | HTML | 2015年 8月 28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 | ||
Application note | Analog PWM Dimming in White-LED Drivers | 2016年 12月 21日 | ||
Application note | Inductor Selection in Boost Converters for LCD Backlight Applications | 2016年 10月 24日 | ||
User guide | AN-2249 LM3532 Evaluation Kit (Rev. B) | 2013年 4月 30日 | ||
User guide | AN-2249 LM3532 Evaluation Kit | 2012年 6月 21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)。
LM3532EVM — LM3532 評估模組
LM3532SW-LINUX — 適用於 LM3532 的 Linux 驅動程式
Linux Mainline Status
Available in Linux Main line: No
Available through git.ti.com: (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
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
- 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
- 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。