MAX20078

同步buck、高亮度LED控制器

业界第一款具有超快响应和伪定频调节器的汽车级Buck控制器


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说明

MAX20078为高压、同步、n沟道MOSFET控制器,适用于高电流buck LED驱动器。器件采用专有的平均电流模式控制结构调节电感电流。该控制方法不需要任何控制环路补偿,同时能够维持接近恒定的开关频率。通过检测底部同步n沟道MOSFET中的电流检测电感电流,不要求检测任何高压电流。器件工作在4.5V至65V较宽输入电压范围。器件设计用于高频操作,可工作在高达1MHz开关频率。高边和低边栅极驱动器具有2A峰值源出和吸入电流能力。驱动器电路也包括逻辑电路,提供自适应非重叠定时,防止瞬态期间的贯通电流。器件包括模拟和PWM调光。器件包括5V VCC稳压器,能够为外部电路提供10mA电流。器件也包括电流监测器,可提供与电感电流成比例的模拟电压。器件具有故障标识,指示输出开路和短路。保护特性包括电感限流保护、过压保护和热关断。MAX20078采用节省空间(3mm × 3mm)的16引脚TQFN封装或16引脚TSSOP封装,工作在-40°C至+125°C汽车级温度范围。

设计解决方案: DS52-Achieve Superior Automotive Exterior Lighting with a High-Power Buck LED Controller ›


MAX20078: Simplified Schematic MAX20078: Simplified Schematic 放大+

关键特性

  • 适用于汽车领域:通过AEC-Q100认证
  • 较宽输入电压范围:4.5V至65V
  • 设计简单
    • 无补偿元件
    • 可编程开关频率
  • 较宽调光比支持高对比度
    • 模拟调光
    • PWM调光
  • 适合矩阵照明
    • 灯串中个别LED短路/开路时可保持电流稳定
    • 超快响应控制环路防止过冲和下冲
  • 故障检测和保护
    • 过压保护
    • 开路和短路检测
    • 低功耗关断模式
    • 热关断
    • 电感电流监测器

应用

  • 汽车前灯
  • 汽车矩阵灯
  • 恒流调节器
  • 抬头显示
Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming RatioDimming ControlVCURR_SENSE
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxmaxmaxminmaxmaxmaxSee Notes
MAX20078 Inductor Based151Series3020100000
Analog
Digital
PWM
2001004.5655060
250
262
300
500
750
1000
1200
1500
2000
2100
2200
4000
TQFN-CU/16
TSSOP/16
$1.92 @1k
查看所有LED Drivers (80)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX20078EVKIT: MAX20078评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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相关资料


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MAX25601D
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MAX25601A
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MAX25601B
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MAX20056B
Integrated, 6-Channel High-Brightness LED Driver with Very Wide PWM Dimming Ratio and Phase Shifting for Automotive Displays

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MAX25612
汽车应用同步、高压LED控制器

  • 高度集成最大程度降低BOM和成本
  • 优化效率、电路板空间和输入工作范围
  • 保护特性提高系统可靠性

类型 编号 标题
评估板9343MAX20078EVKIT MAX20078评估板