MAX25612

Automotive Synchronous High Voltage LED Controller

Single-Channel Synchronous LED Controller for Automotive Exterior Lighting Applications


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说明

The MAX25612 is a single-channel high-brightness LED (HB LED) driver for automotive front-light applications such as high beam, low beam, daytime running light (DRL), turn indicator, fog light and other LED lights. It can take an input voltage from 5V to 48V and can drive a string of LEDs with a maximum output voltage of 65V. The MAX25612 is fully synchronous and is suitable for boost and buck-boost applications that need synchronous rectification providing efficiencies greater than 90%.

The MAX25612 senses output current at the high side of the LED string. High-side current sensing is required to protect against shorts from the output to the ground or battery input. It is also the most flexible scheme for driving LEDs, allowing boost, high-side buck, or buck-boost mode configurations. The PWM input provides LED dimming ratios of up to 5000:1, and the ICTRL input provides additional analog dimming capability in the MAX25612. The MAX25612 also includes a FLT flag that indicates open string, shorted string, and thermal shutdown. The MAX25612 has built-in spread-spectrum modulation for improved electromagnetic compatibility performance. The MAX25612 is available in a space-saving (4mm x 4mm), 20-pin side-wettable TQFN or a 20-pin TSSOP package and is specified to operate overthe -40°C to +125°C automotive temperature range.

MAX25612: Functional Diagrams MAX25612: Functional Diagrams 放大+

关键特性

  • Integration Minimizes BOM and Cost
    • +5.0V to +48V Wide Input Voltage Range with a Maximum +65V Boost Output
    • Integrated pMOS Dimming FET Driver
    • ICTRL Input for Analog Dimming
    • Integrated High-Side Current-Sense Amplifier
    • 200Hz Ramp Generator Simplifies PWM Dimming
  • Simple to Optimize for Efficiency, Board Space, and Input Operating Range
    • Synchronous MOSFET Driver Improves Efficiencyby up to 5% for High-Current Boost, Buck-Boost, and High-Side Buck Applications
    • Programmable Switching Frequency (200kHz to 2.2MHz)
    • 20-Pin TSSOP Package with Exposed Pad and Thermally Enhanced 4mm x 4mm, 20-Pin Side-Wettable TQFN Packages
  • Protection Features Increase System Reliability
    • Short Circuit, Overvoltage and Thermal Protection
    • Fault Diagnosis through Fault Flag
  • Automotive Ready
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified

应用

  • null
  • 商业、工业和建筑照明
  • 日间行车灯(DRL)
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  • 远光灯/近光灯/信号灯/示宽灯
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/Pins
maxmaxmaxminmaxmaxmax
MAX25612 Inductor Based151Series523000
Analog
Analog Controlled PWM
PWM
200100536565
200
2200
TQFN/20
TSSOP/20
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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。


MAX25612EVKIT: Evaluation Kit for the MAX25612

质量和环境数据

申请可靠性报告: MAX25612 
无铅封装的锡(Sn)晶须报告
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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MAX25612
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