降压-升压发光二极管驱动器
当输入电压高于或低于LED电压时，ADI的降压-升压LED驱动器支持LED偏置。这特别适合单节锂离子电池驱动单个LED的情况，其中输入电压可从4.2 V（充满电）降至2.7 V（完全耗尽），同时LED正向电压可在2 V至4 V之间变化，具体取决于亮度和温度。我们的LED驱动器提供最高效率、最低噪声和最小尺寸。我们的同步4开关降压-升压LED驱动器架构可在降压、直通和升压工作模式之间无缝转换，尽管输入电压变化很大，仍可提供稳定调节输出。其他不同的特性包括集成肖特基二极管、精确的LED电流匹配和多路输出能力。
产品选型表
11464
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设计笔记
- DN557 - 低 EMI LED 驱动器具有用于汽车照明的 2A、40V、集成型同步开关
- DN556 - 具集成型电压限制功能的 3A、1MHz 降压模式 LED 驱动器
- DN548 - 效率高达 98% 的 60V 降压-升压型 LED 驱动器具有内部 PWM 调光和扩展频谱
- DN376 - Monolithic Converter Drives High Power LEDs
- DN252 - Current-Limited DC/DC Converter Simplifies USB Power Supplies
- DN501 - 60V 降压-升压型控制器可驱动高功率 LED、给电池充电及调节电压，并以高达 98.5% 的效率提供 100W 和更高的功率
- DN461 - 100V 控制器几乎可从任何输入来驱动高功率 LED 串
- DN449 - 采用 4mm x 5mm QFN 封装的三通道 LED 驱动器能在降压、升压或降压-升压模式中支持 LCD 背光源并提供 3000:1 的 PWM 调光比
- DN1009 - Tiny, Efficient High Power LED Camera Flash Solutions for Cell Phone Applications
- DN340 DC/DC Converter Drives Lumileds White LEDs from a Variety of Power Sources (Chinese Version)
技术文章
- 60V、2MHz 降压-升压型控制器调节高功率电压和电流并具有高效率和低 EMI
- 低 EMI LED 驱动器具有用于汽车照明的 2A、40V、集成型同步开关
- 具集成型电压限制功能的 3A、1MHz 降压模式 LED 驱动器
- Buck-Boost LED Driver Reaches 98% Efficiency, Features Internal PWM Dimming and Spread Spectrum without Flicker
- 扩频频率调制以降低 EMI
- One LED Driver Is All You Need for Automotive LED Headlight Clusters (LT3795)
- Meet Green Standards in 24VAC and 12VAC Lighting Systems: Replace Halogen Bulbs with LEDs Driven by High Power Factor, High Efficiency Converter
- 140W Monolithic Switching Regulator Simplifies Constant-Current/Constant-Voltage Regulation
- LED Driver Yields 3000:1 True Color PWM Dimming with Any Buck, Boost or Buck-Boost Topology from a Wide 3V–40V Input Range
- 4.5A Monolithic LED Drivers with 3000:1 Dimming are Ideal for a Wide Range of High Power LED Applications
- Triple Output LED Driver Delivers 3000:1 Dimming Ratio in Buck, Boost or Buck-Boost Mode
- Constant Current from 3A DC/DC Converter with 2 Rail-to-Rail Current Sense Amplifiers
降压-升压发光二极管驱动器
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Vout Max (typ) (V) | Monolithic | Topology | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LT3966 | 4 | 3 | 60 | 120m | 52 | Yes | Boost, Buck, Buck-Boost, LED Driver | $3.95 (LT3966EUJ#PBF) |
| 2 | LT8393 | 1 | 4 | 60 | 1.5 | 80 | No | Buck-Boost | $3.90 (LT8393EUFDM#PBF) |
| 3 | LT3942 | 1 | 3 | 36 | 2 | 36 | Yes | Buck-Boost | $2.95 (LT3942EUFD#PBF) |
| 4 | LT3952A | 1 | 3 | 42 | 4 | 60 | Yes | Boost, Buck, Buck-Boost, LED Driver | $2.95 (LT3952AEFE#PBF) |
| 5 | LT8391A | 1 | 4 | 60 | 10 | 60 | No | Buck-Boost, LED Driver | $3.23 (LT8391AEUFD#PBF) |
| 6 | LT3922-1 | 1 | 2.8 | 36 | 2 | 40 | Yes | Boost, Buck, Buck-Boost | $2.71 (LT3922EUFD-1#PBF) |
| 7 | LT3922 | 1 | 2.8 | 36 | 2 | 40 | Yes | Boost, Buck, Buck-Boost | $2.71 (LT3922EUFD#PBF) |
| 8 | LT8391 | 1 | 4 | 60 | 10 | 60 | No | Buck-Boost, LED Driver | $3.23 (LT8391EUFD#PBF) |
| 9 | LT3761A | 1 | 4.5 | 60 | 10 | 100 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.20 (LT3761AEMSE#PBF) |
| 10 | LT3761 | 1 | 4.5 | 60 | 10 | 100 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.20 (LT3761EMSE#PBF) |
| 11 | LT3795 | 1 | 4.5 | 110 | 10 | 110 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.45 (LT3795EFE#PBF) |
| 12 | LT3955 | 1 | 4.5 | 60 | 1 | 80 | Yes | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.75 (LT3955EUHE#PBF) |
| 13 | LT3954 | 1 | 4.5 | 40 | 4 | 40 | Yes | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.60 (LT3954EUHE#PBF) |
| 14 | LT3797 | 3 | 2.5 | 40 | 5 | 100 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $4.95 (LT3797ELXE#PBF) |
| 15 | LT3796 | 1 | 6 | 100 | 10 | 100 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $3.45 (LT3796EFE#PBF) |
| 16 | LT3791 | 1 | 4.7 | 60 | 10 | 60 | No | Buck-Boost, LED Driver | $4.75 (LT3791EFE#PBF) |
| 17 | LTM8042-1 | 1 | 3 | 30 | 350m | 32 | Yes | Boost, Buck, LED Driver | $8.76 (LTM8042EV-1#PBF) |
| 18 | LTM8042 | 1 | 3 | 30 | 1 | 32 | Yes | Boost, Buck, LED Driver | $8.76 (LTM8042EV#PBF) |
| 19 | LT3519 | 1 | 3 | 30 | 500m | 45 | Yes | Boost, Buck, Buck-Boost, LED Driver, Sepic | $2.50 (LT3519EMS#PBF) |
| 20 | LT3956 | 1 | 4.5 | 80 | 1.5 | 80 | Yes | Boost, Buck, Buck-Boost, Flyback, LED Driver, Sepic | $3.50 (LT3956EUHE#PBF) |
| 21 | LT3756 | 1 | 6 | 100 | 10 | 100 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $2.90 (LT3756EUD#PBF) |
| 22 | LT3755 | 1 | 4.5 | 40 | 10 | 75 | No | Boost, Buck, Buck-Boost, LED Driver, Sepic | $2.75 (LT3755EUD#PBF) |
| 23 | LT3492 | 3 | 3 | 30 | 300m | 60 | Yes | Boost, Buck, Buck-Boost, LED Driver | $3.70 (LT3492EUFD#PBF) |
| 24 | LT3517 | 1 | 3 | 30 | 1.25 | 40 | Yes | Boost, Buck, Buck-Boost, LED Driver | $2.70 (LT3517EUF#PBF) |
| 25 | LT3518 | 1 | 3 | 30 | 1.86 | 45 | Yes | Boost, Buck, Buck-Boost, LED Driver | $2.95 (LT3518EUF#PBF) |
| 26 | LT3496 | 3 | 3 | 30 | 700m | 45 | Yes | Boost, Buck, Buck-Boost, LED Driver | $3.50 (LT3496EUFD#PBF) |
| 27 | LT3476 | 4 | 2.8 | 16 | 1 | 36 | Yes | Boost, Buck, Buck-Boost, LED Driver | $4.64 (LT3476EUHF#PBF) |
| 28 | LTC3452 | 7 | 2.7 | 5.5 | 50m | 4.5 | Yes | Buck-Boost, LED Driver | $1.80 (LTC3452EUF#PBF) |
| 29 | LT3478 | 1 | 2.8 | 36 | 4.2 | 42 | Yes | Boost, Buck, Buck-Boost, LED Driver | $3.60 (LT3478EFE#PBF) |
| 30 | LTC3454 | 1 | 2.7 | 5.5 | 1 | 5.15 | Yes | Buck-Boost, LED Driver | $1.95 (LTC3454EDD#PBF) |
| 31 | LT3477 | 1 | 2.3 | 25 | 2.66 | 40 | Yes | Boost, Buck, Buck-Boost, LED Driver | $3.15 (LT3477EUF#PBF) |
| 32 | LTC3453 | 4 | 2.7 | 5.5 | 125m | 4.5 | Yes | Buck-Boost, LED Driver | $1.85 (LTC3453EUF#PBF) |
| 33 | LT1618 | 1 | 1.6 | 18 | 1 | 36 | Yes | Boost, Flyback, Sepic | $1.75 (LT1618EDD#PBF) |
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