MAX20444B
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
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| Max. No. of LEDs | 15 |
| # LED Channels | 4 |
| Regulation Topology | Inductor Based |
| LED Configuration | Series-Parallel |
| ILED per Channel (A) (max) | 0.13 |
| PWM Dimming Freq. (kHz) (max) | 20 |
| Dimming Ratio (max) | 20000 |
| Dimming Control | I2C Serial PWM |
| POUT (W) | 32 |
| ICC (mA) (max) | 10 |
| LED String Volt. (V) (max) | 52 |
| Switching Frequency (kHz) | 500 700 750 1000 1200 1500 2000 2100 2200 |
| Package/Pins | TQFN-CU/24 |
| Budgetary Price (See Notes) | 2.92 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface | Mar 02, 2022 | |
| Solution Guide | LED Driver for Automotive Display Applications |
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 .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Parameters
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| Max. No. of LEDs | 15 |
| # LED Channels | 4 |
| Regulation Topology | Inductor Based |
| LED Configuration | Series-Parallel |
| ILED per Channel (A) (max) | 0.13 |
| PWM Dimming Freq. (kHz) (max) | 20 |
| Dimming Ratio (max) | 20000 |
| Dimming Control | I2C Serial PWM |
| POUT (W) | 32 |
| ICC (mA) (max) | 10 |
| LED String Volt. (V) (max) | 52 |
| Switching Frequency (kHz) | 500 700 750 1000 1200 1500 2000 2100 2200 |
| Package/Pins | TQFN-CU/24 |
| Budgetary Price (See Notes) | 2.92 |
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 > 10,000:1 Using Hybrid Dimming
- 10,000:1 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 and SWTQFN Packages
Applications/Uses
- Central Information Displays
- Infotainment Displays
- Instrument Clusters
Description
The MAX20444B is a 4-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 via the I2C interface, while stand-alone operation is also supported.
The MAX20444B 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.
Technical Docs
| Data Sheet | Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface | Mar 02, 2022 | |
| Solution Guide | LED Driver for Automotive Display Applications |
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 .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Request a Quote