MAX20444C
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
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Key Features
Applications/Uses
| 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 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Automotive 4-Channel, 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface | Nov 30, 2021 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
| 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 |
Key Features
- 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
Applications/Uses
- Central Information Displays
- Infotainment Displays
- Instrument Clusters
Description
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.
Simplified Block Diagram
Technical Docs
| Data Sheet | Automotive 4-Channel, 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface | Nov 30, 2021 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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