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 › Applications * Automotive Front Lights * Automotive Matrix Lights * Constant-Current Regulators * Head-Up Displays * Automotive Ready: AEC-Q100 Qualified * Wide Input Voltage Range: 4.5V to 65V * Easy to Design * No Compensation Components * Programmable Switching Frequency * Wide Dimming Ratio Allows High Contrast Ratio * 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 * Fault Detection and Protection * Overvoltage Protection * Open and Short Detection * Thermal Shutdown * Inductor Current Monitor * Low-Power Shutdown Mode https://elecena.pl/product/22320473/synchronous-buck-high-brightness-led-controller 2022-12-27 https://elecena.pl/product/22320473/synchronous-buck-high-brightness-led-controller 2025-01-17