開發模組 (EVM) 的 GUI
LM36922H
- 1% Matched Current Sinks Across Process, Voltage, Temperature
- 3% Current-Sink Accuracy Across Process, Voltage, Temperature
- 11-Bit Dimming Resolution
- Up to 90% Solution Efficiency
- Drives from One to Two Parallel LED Strings at up to 38 V at 25 mA per String
- PWM Dimming Input
- I2C Programmable
- Selectable 500-kHz and 1-MHz Switching Frequency With Optional –12% shift
- Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
- Four Configurable Overvoltage Protection Thresholds (17 V, 24 V, 31 V, 38 V)
- Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA,
1500 mA) - Thermal Shutdown Protection
- Externally Selectable I2C Address Options via ASEL Input
The LM36922H is an ultra-compact, highly efficient, two-string white-LED driver designed for LCD display backlighting. The device can power up to 12 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.
The device operates over the 2.5-V to 5.5-V input voltage range and a –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 3 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM36922H Highly Efficient Dual-String White LED Driver datasheet (Rev. A) | PDF | HTML | 2016年 2月 16日 |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | 2016年 12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)。
開發板
LM36922EVM — LM36922 高效率雙燈串白色 LED 驅動器評估模組
The LM36922 Evaluation Module (LM36922EVM) is designed to fully evaluate the LM36922 Highly Efficient Dual-String White LED backlight driver. The LM36922EVM consists of the LM36922 with 2p8s white LED strings with jumpers to enable 1p2s through 2p8s led string configurations. LED string (...)
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 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFF) | 12 | 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
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。