LM8502
- 10 Programmable Low-Side Current Sinks with Flexible Powering from VOUT or External Voltage Source
- 1.2A Dual Flash LED Driver with Flash, Torch and Voltage modes
- Ambient Light Sensing Capability with Two Inputs
- Up to 4000:1 dimming ratio for LED outputs
- Flash LED Thermal Sensing and Current Scaleback
- Hardware Flash, Torch Enable and Dual Synchronization Inputs for RF Power Amplifier Pulse Events
- Haptic Feedback Motor Driver
- Two Lighting Engines for User-Defined Lighting Sequences with 48 * 16 Bits of SRAM Memory
- External Clock Pin for Power Save
- External PWM Control Capability Enabling for Example Dynamic Backlight Control
- Fast I2C-Compatible Interface
- General Purpose ADC for Measuring, i.e., LED Output Voltages
- Ultra-Small Solution Area < 32 mm2
- 30-Bump (2.42 x 2.77 mm x 0.6 mm) 0.4 Pitch DSBGA Package
The LM8502 is a versatile LED driver suitable for multiple applications. It includes a 2MHz, fixed-frequency synchronous boost converter, 10 current sink LED outputs, 2 outputs for flash or haptic applications, ambient light sensing and PWM input.
The 10 current sink LED outputs offer individual current control through an I2C-compatible interface. Current can be accurately controlled with a full-scale setting and 8-bit current control. The LM8502 also enables LED control with group faders and lighting engines. Group faders enable single I2C register writes for multiple LED outputs with fading, whereas lighting engines with SRAM memory enable engine-driven lighting sequences. Each LED output can be powered either from VOUT or an external voltage supply.
The flash function is capable of driving 2 LEDs, each having 600 mA maximum current, or a single LED up to a 1.2A maximum current. A hardware flash enable provides a direct interface to trigger the flash pulse. Dual TX inputs allow the flash to be synchronized with the RF power system to prevent excessive current draw from the system power supply. The LM8502 also offers LED thermal sensing as a safety procedure for flash and separate indicator LED.
The LM8502 has two inputs for Ambient Light Sensing — together with the PWM input they enable Dynamic Backlight Control. The LM8502 may also be used for haptic motor driving instead of flash. When the device is idle, featured Power-save mode and use of an external clock reduce current consumption significantly.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM8502 Intelligent LMU Fusing 1.2A Dual HS Flash LED Drvr w/10-Outpt LS LED Drvr datasheet (Rev. D) | 2013年 2月 20日 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Application note | How to Select a RGB LED Driver | 2019年 8月 8日 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 |
設計與開發
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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) | 30 | 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