company blog about MAXIM MAX20090BATP Automotive Single-Channel High-Voltage High-Brightness LED Controller

MAXIM MAX20090BATP Automotive Single-Channel High-Voltage High-Brightness LED Controller

Product Description Of MAX20090BATP

MAX20090BATP is a single-channel high-brightness LED (HB LED) driver for automotive front-light applications such as high beam, low beam, daytime running lights (DRLs), turn indicators, fog lights, and other LED lights. It can take an input voltage from 5V to 65V and drive a string of LEDs with a maximum output voltage of 65V.

The device senses output current at the high side of the LED string. High-side current sensing is required to protect for 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, SEPIC mode, or buck-boost-mode configurations. The PWM input provides LED dimming ratios of up to 1000:1, and the ICTRL input provides additional analog dimming capability in the controller. The device also includes a fault flag ( active-low FLT) that indicates open string, shorted string, and thermal shutdown. The device has built-in spread-spectrum modulation for improved electromagnetic-compatibility performance. The device can also be used in zeta and Cuk converter configurations, if necessary in some applications.

Specification Of MAX20090BATP

Input Voltage: 5 V to 65 V

Input Voltage - Max: 65 V

Input Voltage - Min: 5 V

Maximum Operating Temperature: + 125 C

Minimum Operating Temperature: - 40 C

Number of Channels: 1 Channel

Number of Outputs: 1 Output

Operating Frequency: 200 kHz to 2.2 MHz

Output Current: 3 A

Output Voltage: 65 V

Supply Current - Max: 5 mA

Features Of MAX20090BATP

High-Brightness LED Driver with a Wide Input Range Saves Space and Cost Through Integration

+5V to +65V Wide Input Voltage Range

+65V Maximum Boost Output Voltage

ICTRL Pin for Analog Dimming

Integrated High-Side Current-Sense Amplifier

200Hz On-Board Ramp Simplifies PWM Dimming

Flexible Architecture Enables Easy Design Optimization

Configurable as Boost, High-Side Buck, SEPIC, Buck-Boost, Zeta, and Cuk

Programmable Switching Frequency (200kHz to 2.2MHz)

Spread-Spectrum Modulation to Reduce EMI Noise

Automotive Features and Robustness Improve System Reliability

Fault Diagnosis Through Fault Flag

Short Circuit, Overvoltage, and Thermal Protection

-40°C to +125°C Operating Temperature Range

Applications Of MAX20090BATP

Automotive Exterior Lighting

Commercial, Industrial, and Architectural Lighting

Daytime Running Lights (DRLs)

Fog Lights and Adaptive Front-Light Assemblies

Head-Up Displays

High-Beam/Low-Beam/Signal/Position Lights

Simplified Typical Operating Circuit

Simplified Schematic