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Automotive 4-Channel, 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface

4-Channel, 130mA LED Driver Provides Full Diagnostics and Hybrid Dimming thru I2C

产品详情

主要特征

Parametric specs for LED Drivers
VIN (V) (min) 4.5
VIN (V) (max) 42
Max. No. of LEDs 48
# LED Channels 4
Regulation Topology Boost
Inductor Based
SEPIC
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.13
PWM Dimming Freq. (kHz) (max) 20
Dimming Ratio (max) 10000
Dimming Control I2C Serial
PWM
POUT (W) 25
ICC (mA) (max) 4
LED String Volt. (V) (max) 52
Switching Frequency (kHz) 400
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
2.52
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参量

Parametric specs for LED Drivers
VIN (V) (min) 4.5
VIN (V) (max) 42
Max. No. of LEDs 48
# LED Channels 4
Regulation Topology Boost
Inductor Based
SEPIC
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.13
PWM Dimming Freq. (kHz) (max) 20
Dimming Ratio (max) 10000
Dimming Control I2C Serial
PWM
POUT (W) 25
ICC (mA) (max) 4
LED String Volt. (V) (max) 52
Switching Frequency (kHz) 400
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
2.52

主要特征

  • Wide-Voltage-Range Operation
    • Operates Down to 4V Supply After Startup
    • Survives Load Dump Up to 52V
  • 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
    • Fail-Safe Operation Mode Using the FSEN Pin
  • Versatile Dimming Scheme Allows Hybrid or PWM-Only Dimming Using DIM Input or I2C
    • Dimming Ratio > 10000:1 Using Hybrid Dimming
    • 10000:1 Dimming Ratio at 200Hz Using PWM Dimming
  • Complete Diagnostics
    • LED Open/Short Detection and Protection
    • Boost Output Undervoltage and Overvoltage
    • Boost-Voltage Measurement
    • LED-Current Measurement
    • Thermal Shutdown
  • Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

应用/用途

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

描述

The MAX20444C is a 4-channel backlight driver IC with boost controller for automotive displays. The integrated current outputs can sink up to 130mA LED current each. The device accepts a wide 4.5V to 36V input voltage range and withstands direct 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.

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 also available through the I2C interface, while stand-alone operation is also supported.

The MAX20444C 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.

简化框图

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心