RT4540中文资料36V High Efficiency Boost Converter with I2C Controlled 6-CH LED Driver数据手册Richtek规格书
RT4540规格书详情
描述 Description
The RT4540 is a high efficiency driver for white LEDs. It is suitable for single/two cell battery input to drive LED light bars which contains six strings in parallel. The internal current sinks support a maximum of ±2% current mismatching for excellent brightness uniformity in each string of LEDs. To provide enough headroom for current sink operation, the boost controller monitors the minimum voltage of the feedback pins and regulates an optimized output voltage for power efficiency.
The RT4540 contains I2C interface for controlling the dimming mode, operating frequency and the LED current. The internal 250mΩ, 36V power switch with current-mode control provides over current protection.
The switching frequency of the RT4540 is also adjustable from 100kHz to 1.6MHz, which allows flexibility between efficiency and component size.
The RT4540 is available in the WQFN-24L 3x3 with pitch 0.4mm package.
特性 Features
•Wide Operating Input Voltage : 2.7V to 24V
•Channel Current Programmable : 6mA to 25mA
•Dimming Controls
•I2C Programs LED Current, Switching Frequency, Dimming Mode
•Embedded Memory with MTP.
•Protections
► LED Strings Open Protection
► Current Limit Protection
► Programmable Over Voltage Protection
► Over Temperature Protection
► Strings Short Detection
应用 Application
• Tablet and Notebook LED Backlight
| 供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
|---|---|---|---|---|---|---|---|
RAFAELMIC |
20+ |
QFN |
19570 |
原装优势主营型号-可开原型号增税票 |
询价 | ||
RICHTEK/立锜 |
22+ |
QFN |
100000 |
代理渠道/只做原装/可含税 |
询价 | ||
RICHTEK/立锜 |
2026+ |
QFN |
54658 |
百分百原装现货 实单必成 |
询价 | ||
MAXIM/美信 |
23+ |
DIP24 |
69820 |
终端可以免费供样,支持BOM配单! |
询价 | ||
RAFAELMICRO |
2023+ |
QFN |
6895 |
原厂全新正品旗舰店优势现货 |
询价 | ||
RICHTEK/立锜 |
25+ |
QFN |
880000 |
明嘉莱只做原装正品现货 |
询价 | ||
RICHTEK/立锜 |
21+ |
QFN |
20000 |
百域芯优势 实单必成 可开13点增值税发票 |
询价 | ||
RICHTEK |
21+ |
QFN |
1507 |
询价 | |||
RAFA |
24+ |
QFN |
5000 |
全新原装正品,现货销售 |
询价 | ||
RICHTEK/立锜 |
1347+ |
QFN |
50 |
原装现货 |
询价 |


