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Automotive Synchronous High Voltage LED Controller

Single-Channel Synchronous LED Controller for Automotive Exterior Lighting Applications

Product Details

Key Features

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 48
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 5
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 3000
Dimming Control Analog
Analog Controlled PWM
PWM
VCURR_SENSE (mV) 200
POUT (W) 100
ICC (mA) (max) 5
LED String Volt. (V) (max) 65
Switching Frequency (kHz) 2200
Package/Pins TQFN-CU/20
TSSOP-CU/20
Budgetary
Price (See Notes)
2.51
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Simplified Block Diagram

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Parameters

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 48
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 5
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 3000
Dimming Control Analog
Analog Controlled PWM
PWM
VCURR_SENSE (mV) 200
POUT (W) 100
ICC (mA) (max) 5
LED String Volt. (V) (max) 65
Switching Frequency (kHz) 2200
Package/Pins TQFN-CU/20
TSSOP-CU/20
Budgetary
Price (See Notes)
2.51

Key Features

  • Integration Minimizes BOM and Cost
    • +5.0V to +48V Wide Input Voltage Range with a Maximum +65V Boost Output
    • Integrated pMOS Dimming FET Driver
    • ICTRL Input for Analog Dimming
    • Integrated High-Side Current-Sense Amplifier
    • 200Hz Ramp Generator Simplifies PWM Dimming
  • Simple to Optimize for Efficiency, Board Space, and Input Operating Range
    • Synchronous MOSFET Driver Improves Efficiencyby up to 5% for High-Current Boost, Buck-Boost, and High-Side Buck Applications
    • Programmable Switching Frequency (200kHz to 2.2MHz)
    • 20-Pin TSSOP Package with Exposed Pad and Thermally Enhanced 4mm x 4mm, 20-Pin Side-Wettable TQFN Packages
  • Protection Features Increase System Reliability
    • Short Circuit, Overvoltage and Thermal Protection
    • Fault Diagnosis through Fault Flag
  • Automotive Ready
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified

Applications/Uses

  • Automotive Exterior Lighting:
  • Commercial, Industrial, and Architectural Lighting
  • Daytime Running Lights (DRLs)
  • Fog Light and Adaptive Front-Light Assemblies
  • High-Beam/Low-Beam/Signal/Position Lights

Description

The MAX25612/MAX25612B is a single-channel high-brightness LED (HB LED) driver for automotive front-light applications such as high beam, low beam, daytime running light (DRL), turn indicator, fog light and other LED lights. It can take an input voltage from 5V to 48V and can drive a string of LEDs with a maximum output voltage of 65V. The MAX25612/MAX25612B is fully synchronous and is suitable for boost and buck-boost applications that need synchronous rectification providing efficiencies greater than 90%.

The MAX25612/MAX25612B senses output current at the high side of the LED string. High-side current sensing is required to protect against shorts from the output to the ground or battery input. It is also the most flexible scheme for driving LEDs, allowing boost, high-side buck, or buck-boost mode configurations. The PWM input provides LED dimming ratios of up to 5000:1, and the ICTRL input provides additional analog dimming capability in the MAX25612/MAX25612B. The MAX25612/MAX25612B also includes a active-low FLT flag that indicates open string, shorted string, and thermal shutdown. The MAX25612/MAX25612B has built-in spread-spectrum modulation for improved electromagnetic compatibility performance. The MAX25612/MAX25612B is available in a space-saving (4mm x 4mm), 20-pin side-wettable TQFN or a 20-pin TSSOP package and is specified to operate overthe -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX25612: Functional Diagrams MAX25612: Functional Diagrams 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 .