MAX1698, MAX1698A：高效率、升压型稳流器，用于LED驱动
The MAX1698 and MAX1698A are efficient drivers for white or color LEDs. They are ideal for large LED backlit displays in PDAs and laptop computers. Numerous benefits include greater simplicity, lower cost, higher efficiency, longer bulb life, and greater reliability when compared to fluorescent (CCFL) and electroluminescent (EL) lamps. The MAX1698/MAX1698A are switch-mode boost controllers in which LED current, rather than output voltage, is regulated The devices drive series-connected LEDs with a controlled current that is measured with a typically 15Ω sense resistor, not an expensive fractional-ohm value. LED current control and dimming are accomplished with an adjust input (ADJ). For larger light output, multiple LED banks can be connected in parallel with up to 5W total output power. The MAX1698A has a higher, and more accurately specified, CS current limit than the MAX1698 for higherpower applications of 5W or more. Both devices are supplied in a space-saving 10-pin µMAX package that occupies half the space of an 8-pin SO. An evaluation kit (MAX1698EVKIT) is available to speed designs.
关键特性
| MAX1698、MAX1698A：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX1698-MAX1698A.pdf | Rev 2; 03/2007 |
关键参数
| Part Number | Battery Input | Regulation Topology | Max. No. of LEDs | LED Channels | LED Configuration | ILED per Channel (A) | Dimming Ratio | Dimming Control | VCURR_SENSE (mV) | POUT (W) | VIN (V) | VIN (V) | ICC (mA) | LED String Volt. (V) | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| max | max | min | max | max | max | See Notes | |||||||||||
| MAX1698 | 1-Cell Li+ | Inductor Based | 50 | 4 | Series-Parallel | 0.35 | 20 | Analog | 300 | 5 | 2.7 | 5.5 | 0.5 | 60 | 300 | µMAX/10 | $1.40 @1k |
开发工具
技术资料
- Protect LED Driver in Backlit Displays
- Low-Power PWM Output Controls LED Brightness
- Single FET Controls 2nd LED Array in Switch-Mode LED Backlight
- Circuit Drives Mixed Types and Quantities of LEDs
- Feedback Circuit Enhances Efficiency of Boost-Converter Current Source
质量和环境数据
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX1698AEUB+ | 生产中 | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1698AEUB+T | 生产中 | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1698EUB | 停止供货 | MAX1698EUB+ | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1698EUB+ | 生产中 | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1698EUB+T | 生产中 | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1698EUB-T | 停止供货 | MAX1698EUB+T | µMAX,；10引脚；15.4mm² | -40°C至+85°C | RoHS/无铅：否 |
- MAX1698-MAX1698A.pdf MAX1698
- Protect LED Driver in Backlit Displays MAX9060
- Low-Power PWM Output Controls LED Brightness MAX1698
- Single FET Controls 2nd LED Array in Switch-Mode LED Backlight MAX1698
- Circuit Drives Mixed Types and Quantities of LEDs MAX4040
- Feedback Circuit Enhances Efficiency of Boost-Converter Current Source MAX1698
- MAX1698.pdf MAX1698
- MAX1698-MAX1698A.pdf MAX1698A
