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Automotive 4-Channel Low-Voltage 120mA LED Backlight Driver with Integrated Boost Converter

Industry Best Efficiency Integrated Boost Converter LED Driver

Product Details

Key Features

Applications/Uses

Parametric specs for LED Drivers
VIN (V) (min) 3
VIN (V) (max) 36
Max. No. of LEDs 40
# LED Channels 4
Regulation Topology Inductor Based
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.12
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 16666
Dimming Control Analog
I2C Serial
PWM
VDROPOUT (mV) (typ) 750
POUT (W) 15
ICC (mA) (max) 5.5
LED String Volt. (V) (max) 40
Switching Frequency (kHz) 400
500
750
2100
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
0.99
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Simplified Block Diagram

Technical Docs

Support & Training

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Filtered Search

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 3
VIN (V) (max) 36
Max. No. of LEDs 40
# LED Channels 4
Regulation Topology Inductor Based
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.12
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 16666
Dimming Control Analog
I2C Serial
PWM
VDROPOUT (mV) (typ) 750
POUT (W) 15
ICC (mA) (max) 5.5
LED String Volt. (V) (max) 40
Switching Frequency (kHz) 400
500
750
2100
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
0.99

Key Features

  • Operates Down to 3V on Battery Input After Startup 
    • Wide Boost Duty Cycle to Support Low Input Voltage
  • Boost or SEPIC Current-Mode DC/DC Controller
    • 400kHz to 2.2MHz Operating Frequency Range
    • Spread Spectrum Available
    • Ability to Synchronize to an External Clock
  • LED Current Sinks
    • Up to 120mA Output Current per String
    • Low OUT_ Regulation Voltage for Best Efficiency
    • Optional Phase-Shifting of Outputs
  • I2C Control for Enhanced Flexibility
  • 16667:1 Dimming Ratio at 200Hz
  • NTC Input For LED Current Foldback at High Temperature
  • Hybrid Dimming Capable
  • Built-in Programmable Automatic Fading Functionality
  • Detailed Diagnostic using I2C and FLTB Output
    • Shorted or Open LEDs
    • Thermal Shutdown
    • Output Undervoltage
  • Compact 4x4mm TQFN Package
  • AECQ100 Grade 1

Applications/Uses

  • Automotive Instrument Clusters
  • Automotive Central Information Displays
  • Automotive Head-Up Displays

Description

The MAX25512 is a four-channel white LED backlight driver with an integrated current-mode boost converter which operates over a switching frequency range of 400kHz to 2.2MHz and incorporates spread spectrum. Phase-shifting of the output channels is included as an option to further reduce electromagnetic interference (EMI).

The device provides up to 120mA per channel and includes a control output for an external nMOS series switch. It is capable of operating down to 3V after startup.

The MAX25512 has an I2C interface to enable flexibility of control and detailed diagnostics.

The MAX25512 is available in a compact TQFN package and operates over the temperature range -40°C to +125°C.

Simplified Block Diagram

MAX25512: Simplified Block Diagram MAX25512: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .