LM3630A
- Drives up to 2 Strings of 10 Series LEDs
- Wide 2.3-V to 5.5-V Input Voltage Range
- Up to 87% Efficient
- 8-bit I2C-Compatible Programmable Exponential or Linear Brightness Control
- PWM Brightness Control for CABC Operation
- Independent Current Control per String
- True Shutdown Isolation for LEDs
- Internal Soft-Start Limits Inrush Current
- Adaptive Headroom
- Programmable 16-V/24-V/32-V/40-V Overvoltage Protection
- Selectable Boost Frequency of 500 kHz or 1 MHz with Optionally Additional Offset
- Low Profile 12-Pin DSBGA Package
- Solution Size 32 mm²
The LM3630A is a current-mode boost converter which supplies the power and controls the current in up to two strings of 10 LEDs per string. Programming is done over an I2C-compatible interface. The maximum LED current is adjustable from 5 mA to 28.5 mA. At any given maximum LED current the LED brightness is further adjusted with 256 exponential or linear dimming steps. Additionally, pulsed width modulation (PWM) brightness control can be enabled allowing for LED current adjustment by a logic level PWM signal.
The boost switching frequency is programmable at 500 kHz for low switching loss
performance or 1 MHz to allow the use of tiny low-profile inductors. A setting for a 10% offset of
these frequencies is available. Overvoltage protection is programmable at 16 V,
24 V, 32 V, or 40 V to accommodate a wide variety of LED configurations and Schottky
diode/output capacitor combinations.
The device operates over a 2.3-V to 5.5-V operating voltage range and –40°C to +85°C ambient temperature range. The LM3630A is available in an ultra-small 12-bump DSBGA package.
For all available packages, see the orderable addendum at the end of the data sheet.技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM3630A High-Efficiency Dual-String White LED Driver 数据表 (Rev. B) | PDF | HTML | 2015-10-27 | ||
| 白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020-9-21 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
LM3630EVM — LM3630EVM 高效双串白色 LED 驱动器评估模块
LM3630ASW-LINUX — 用于 LM3630A 的 Linux 驱动程序
The Linux driver supports the LM3630A White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the backlight sub-system.
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lm3630a
Linux Source Files
The (...)
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 12 | Ultra Librarian |
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