MAX25024

Automotive Low Input Voltage I2C 4-Channel 150mA Backlight Driver Supporting ASIL B

4-Channel 150mA I2C LED Driver Supporting ASIL B


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说明

The MAX25024 is a 4-channel backlight driver IC with boost controller for automotive displays. The integrated current outputs can sink up to 150mA LED current each. The device accepts a wide 2.5V to 36V input voltage range and withstands automotive load-dump events.

The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the 400kHz to 2.2MHz frequency range. Integrated spread spectrum helps reduce EMI. An adaptive output-voltage-control scheme minimizes power dissipation in the LED current-sink paths.

Control is included for an external nMOSFET series switch to reduce quiescent current when the backlight is off and to disconnect the boost converter in the case of a fault.

The device features I2C-controlled pulse-width-modulation (PWM) dimming and hybrid dimming. In either case, the minimum pulse width is 500ns. Phase-shifted dimming of the strings is incorporated for lower EMI.

Comprehensive diagnostic information is available through the I2C interface to ease integration in systems requiring ASIL B compliance.

The MAX25024 is available in a 24-pin TQFN or 24-pin side-wettable TQFN (SWTQFN) package and operates over the -40°C to +125°C temperature range.

MAX25024: Typical Application Circuit MAX25024: Typical Application Circuit 放大+

关键特性

  • Wide Voltage-Range Operation
    • Operates Down to 2.5V Supply After Startup
    • Survives Load Dumps Up to 40V
  • High Integration
    • Complete 4-Channel Solution Including Boost Controller
    • I2C Control for Minimum Parts Count
  • Robust and Low EMI
    • Spread-Spectrum Oscillator
    • Phase Shifting
    • 400kHz to 2.2MHz Switching-Frequency Range
    • nMOS Input Protection Switch
  • Multiple Features for ASIL B Systems
    • LED-Current Measurement
    • Boost Input Current Measurement
    • Boost Output Voltage Measurement
    • LED Open/Short Detection and Protection
    • Boost Output Undervoltage and Overvoltage
  • Versatile Dimming Scheme Allows Hybrid or PWM-Only Dimming Using DIM Input or I2C
    • Dimming Ratio > 10,000:1 Using Hybrid Dimming
    • 10,000:1 Dimming Ratio at 200Hz Using PWM Dimming
  • Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

应用

  • 中央信息显示屏
  • 信息娱乐系统显示屏
  • 仪表盘

请查看具体的参数规格 LED Drivers (82)


Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming RatioDimming ControlVDROPOUT
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxmaxmaxtypminmaxmaxSee Notes
MAX25024 NEW!Inductor Based1540.152020000
I2C Serial
PWM
700322.536522200
TQFN-CU/24
$2.80 @1k

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。

MAX25024EVKIT: Evaluation Kit for the MAX25024
申请可靠性报告: MAX25024 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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


MAX25024
Automotive Low Input Voltage I2C 4-Channel 150mA Backlight Driver Supporting ASIL B

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  • High Integration
  • Robust and Low EMI

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