MAX20446B Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I2C Interface

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MAX20446B

インタラクティブなデータシート今すぐ購入ダウンロード

Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I²C Interface

6チャネル130mA LEDドライバ、I²Cを介して完全な診断およびハイブリッド調光を提供

印刷可能なデータシート

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製品の詳細

パラメトリック仕様を見る： LED Drivers

主な特長

アプリケーション/用途

パラメトリック仕様を見る： LED Drivers

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技術資料

データシート

Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I²C Interface

Feb 17, 2021

設計と開発

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ハードウェア開発

評価ボード

MAX20446BEVKIT

データシート

$84.00

説明

The MAX20446B evaluation kit (EV kit) demonstrates the MAX20446B integrated 6-channel high-brightness (HB) LED driver with boost controller and I²C interface for automotive displays.

The EV kit operates from a DC supply voltage between 4.5V and 36V and the switching frequency can be set either at 2.2MHz or at 400kHz. The EV kit operates in I²C mode only. Spread-spectrum mode (SSM) is enabled by default for electromagnetic interference (EMI) improvement but can be disabled by acting on a register bit. The EV kit demonstrates phase-shifted pulse-width modulation (PWM) dimming. Dimming can be performed externally using a PWM signal applied to the DIM PCB pad or internally by programming the desired dimming frequency and individual duty cycle through I²C. The hybrid dimming feature can be enabled through a register bit to reduce EMI. The EV kit also demonstrates short-LED, open-LED, boost output undervoltage, as well as overvoltage- and overtemperature-fault protection.

For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the MAX20446B IC data sheet.

The EV kit provides an I²C nterface that can operate in conjunction with the Maxim command module (MINIQUSB+) or a third-party I²C master. The EV kit also includes Windows^®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC.

詳細を見る

特長

Demonstrates Robustness of MAX20446B
Wide 4.5V to 36V Input Operating Range (Up to 52V Load Dump)
Powers HB LEDs (Up to Six Strings) for Medium-to- Large-Sized LCD Displays in Automotive and Display Backlight Applications
400kHz to 2.2MHz Resistor-Programmable Switching Frequency with Spread-Spectrum Option
Phase-Shift Dimming Option
Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
Demonstrates Wide Dimming Ratio
Demonstrates Fail-Safe Operation
I²C Programmability
Dedicated GUI
Proven PCB Layout and Thermal Design
Fully Assembled and Tested

評価ボード

MAX20446BEVKIT

データシート

$84.00

説明

The MAX20446B evaluation kit (EV kit) demonstrates the MAX20446B integrated 6-channel high-brightness (HB) LED driver with boost controller and I²C interface for automotive displays.

For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the MAX20446B IC data sheet.

詳細を見る

特長

Demonstrates Robustness of MAX20446B
Wide 4.5V to 36V Input Operating Range (Up to 52V Load Dump)
Powers HB LEDs (Up to Six Strings) for Medium-to- Large-Sized LCD Displays in Automotive and Display Backlight Applications
400kHz to 2.2MHz Resistor-Programmable Switching Frequency with Spread-Spectrum Option
Phase-Shift Dimming Option
Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
Demonstrates Wide Dimming Ratio
Demonstrates Fail-Safe Operation
I²C Programmability
Dedicated GUI
Proven PCB Layout and Thermal Design
Fully Assembled and Tested

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説明

The MAX20446 is a 6-channel backlight driver 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 frequency range 400kHz to 2.2MHz. 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.

The device is available in a 24-pin TQFN package and operates over the -40°C to 125°C temperature range.

Design Solution: Overcome the Design Challenges of New Automotive Display Backlights ›

MAX20446B: Typical Application Circuit

主な特長

Wide-Voltage-Range Operation
- Operates Down to 4V Supply After Startup
- Survives Load Dump Up to 52V
High Integration
- Complete 6-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
- Individual String LED Current
- Thermal Shutdown
Compact (4mm x 4mm) 24-Pin TQFN Package

アプリケーション/用途

中央情報ディスプレイ
インフォテインメントディスプレイ
計器クラスタ

主な特長

Wide-Voltage-Range Operation
- Operates Down to 4V Supply After Startup
- Survives Load Dump Up to 52V
High Integration
- Complete 6-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
- Individual String LED Current
- Thermal Shutdown
Compact (4mm x 4mm) 24-Pin TQFN Package

アプリケーション/用途

中央情報ディスプレイ
インフォテインメントディスプレイ
計器クラスタ

説明

Comprehensive diagnostic information is also available through the I²C interface.

The device is available in a 24-pin TQFN package and operates over the -40°C to 125°C temperature range.

Design Solution: Overcome the Design Challenges of New Automotive Display Backlights ›

簡易ブロック図

MAX20446B: Typical Application Circuit

技術資料

データシート

Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I²C Interface

Feb 17, 2021

サポートとトレーニング

技術質問への回答についてはナレッジベースで検索ください。

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INTERACTIVE Data Sheet

MAX20446B

Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I2C Interface

製品の詳細

主な特長

アプリケーション/用途

簡易ブロック図

技術資料

設計と開発

サポートとトレーニング

説明

主な特長

アプリケーション/用途

主な特長

アプリケーション/用途

説明

簡易ブロック図

技術資料

サポートとトレーニング

MAX20446B 関連ビデオ

Automotive 6-Channel Backlight Driver with Boost/SEPIC Controller and I²C Interface