MAX20078EVKIT# by Analog Devices

Synchronous Buck, High-Brightness LED Controller


The MAX20078 is a high-voltage, synchronous n-channel MOSFET controller for high-current buck LED drivers. The device uses a proprietary average current-mode-control scheme to regulate the inductor current. This control method does not need any control-loop compensation while maintaining nearly constant switching frequency. Inductor current sense is achieved by sensing the current in the bottom synchronous n-channel MOSFET. It does not require any current sense at high voltages. The device operates over a wide 4.5V to 65V input range. The device is designed for high-frequency operation and can operate at switching frequencies as high as 1MHz. The high- and low-side gate drivers have peak source and sink current capability of 2A. The driver block also includes a logic circuit that provides an adaptive nonoverlap time to prevent shoot-through currents during transition. The device includes both analog and PWM dimming. The device includes a 5V VCC regulator capable of delivering 10mA to external circuitry. The device also includes a current monitor that provides an analog voltage proportional to the inductor current. The device has a fault flag that indicates open and shorts across the output. Protection features include inductor current-limit protection, overvoltage protection, and thermal shutdown. The MAX20078 is available in a space-saving (3mm × 3mm), 16-pin TQFN or a 16-pin TSSOP package and is specified to operate over the -40°C to +125°C automotive temperature range. Design Solution: Driver Monitoring Systems Need a New Breed of IR-LED Drivers › Design Solution: Achieve Superior Automotive Exterior Lighting with a High-Power Buck LED Controller ›

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Features

Automotive Ready: AEC-Q100 Qualified
Wide Input Voltage Range: 4.5V to 65V
Easy to Design No Compensation Components Programmable Switching Frequency
No Compensation Components
Programmable Switching Frequency
Wide Dimming Ratio Allows High Contrast Ratio Analog Dimming PWM Dimming
Analog Dimming
PWM Dimming
Suitable for Matrix Lighting Maintains Current Regulation While Shorting/Opening Individual LEDs in the String Ultra-Fast Response Control Loop Prevents Overshoots and Undershoots
Maintains Current Regulation While Shorting/Opening Individual LEDs in the String
Ultra-Fast Response Control Loop Prevents Overshoots and Undershoots
Fault Detection and Protection Overvoltage Protection Open and Short Detection Thermal Shutdown Inductor Current Monitor
Overvoltage Protection
Open and Short Detection
Thermal Shutdown
Inductor Current Monitor
Low-Power Shutdown Mode

Specifications

VIN (V) (min) 4.5
VIN (V) (max) 65
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 30
PWM Dimming Freq. (kHz) (max) 20
Dimming Ratio (max) 100000
Dimming Control AnalogDigitalPWM
VCURR_SENSE (mV) 200
POUT (W) 100
ICC (mA) (max) 50
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 2502623005007501000120015002000210022004000
Package/Pins TQFN-CU/16TSSOP-CU/16
BudgetaryPrice (See Notes) 2.24


MAX20078EVKIT# Development Boards & Evaluation Kits by Analog Devices

EVALUATION KIT PWM LED DRIVER 65V

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Device Topology Synchronous Buck (Step Down)
No. of Outputs -
Output Current 2A
Output Voltage -
Input Voltage Min 4.5V
Input Voltage Max 65V
Core Chip MAX20078
Dimming Control Type PWM
Kit Contents Evaluation Kit MAX20078
Product Range -
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

EVKIT for High Voltage LED Buc | Analog Devices
Evaluation Kit, Pwm Led Driver, 65V | Newark Electronics
EVALUATION KIT, PWM LED DRIVER, 65V | element14

Frequently Asked Questions

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Is the MAX20078EVKIT# RoHS compliant?

This part has not been flagged as RoHS Compliant.

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