Analog Devices Inc./Maxim Integrated

The MAX20446 is a 6-channel backlight driver with boost controller for automotive displays. The integrated current outputs can sink up to 130mA LED current each. The device accepts a wide 4.5V to 36V input voltage range and withstands direct automotive load-dump events.The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the frequency range 400kHz to 2.2MHz. Integrated spread spectrum helps reduce EMI. An adaptive output-voltage control scheme minimizes power dissipation in the LED current-sink paths.The device features I2C-controlled pulse-width modulation (PWM) dimming and hybrid dimming. In either case the minimum pulse width is 500ns. Phase-shifted dimming of the strings is incorporated for lower EMI.Comprehensive diagnostic information is also available through the I2C interface.The device is available in a 24-pin TQFN package and operates over the -40°C to 125°C temperature range.ApplicationsCentral Information DisplaysInfotainment DisplaysInstrument Clusters

The MAX20446 is a 6-channel backlight driver with boost controller for automotive displays. The integrated current outputs can sink up to 130mA LED current each. The device accepts a wide 4.5V to 36V input voltage range and withstands direct automotive load-dump events.The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the frequency range 400kHz to 2.2MHz. Integrated spread spectrum helps reduce EMI. An adaptive output-voltage control scheme minimizes power dissipation in the LED current-sink paths.The device features pulse-width modulation (PWM) dimming and hybrid dimming. In either case the minimum pulse width is 500ns. Phase-shifted dimming of the strings is incorporated for lower EMI.The MAX20446C is exceptionally easy to configure using a single resistor on the SET pin.The device is available in a 24-pin TQFN package and operates over the -40 to +125°C temperature range.ApplicationsCentral Information DisplaysInfotainment DisplaysInstrument Clusters

The MAX20457 offers two automotive-grade synchronous buck converters with fixed frequency of either 2.1MHz or 400kHz. The two high-voltage synchronous step-down converters operate 180 degrees out of phase. The IC operates with an input voltage supply from 3.5V to 36V and can operate in dropout conditions by running at 95% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions.High switching frequency up to 2.1MHz allows small external components, reduced output ripple, and guarantees no AM band interference. The switching frequency is fixed at 400kHz or 2.1MHz. FSYNC input programmability enables three modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and phase-locked synchronization to an external clock. The spread spectrum option minimizes EMI interference.The IC features power-OK indicators and undervoltage lockout for the buck converters. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20457 is specified for operation over the -40°C to +125°C automotive temperature range.ApplicationsAutomotive Start-Stop SystemInstrument ClusterNavigation and Radio Head UnitsTelematics Applications

The MAX20458 is an automotive grade PMIC that includes a 3.5A synchronous buck converter and an asynchronous boost controller with 2.1MHz and 400kHz options. The boost controller can be used to provide power to buck converters and keep them in regulation during cold-crank operation down to 2V battery input. The IC operates with an input voltage supply from 3.5V to 36V and can operate in dropout conditions by running at 95% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range, such as during automotive cold-crank or engine stop-start conditions.High switching frequency up to 2.1MHz allows small external components, reduced output ripple, and guarantees no AM band interference. The switching frequency is fixed at 400kHz or 2.1MHz. FSYNC input programmability enables three modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and phase-locked synchronization to an external clock. The spread spectrum option minimizes EMI interference.The IC features the power-OK indicators for buck converters and undervoltage lockout for each power rail. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20458 is specified for operation over the -40°C to +125°C automotive temperature range.ApplicationsAutomotive Start-Stop SystemDistributed DC Power SystemsInstrument ClusterNavigation and Radio Head Units

The MAX20461 combines a 3A high-efficiency, automotive-grade, step-down converter, a USB Type-C/BC1.2 host charger emulator, and high-bandwidth USB protection switches for automotive USB 2.0 host applications. The device also includes a USB load current-sense amplifier and a configurable feedback-adjustment circuit that provides automatic USB voltage compensation for voltage drops in captive cables often found in automotive applications. The device limits the USB load current using both a fixed internal peak-current threshold and a user-configurable external current-sense USB load threshold.The MAX20461 is optimized for high-frequency operation and includes programmable frequency selection from 310kHz to 2.2MHz, allowing optimization of efficiency, noise, and board space based on the application requirements. The fully synchronous DC-DC converter integrates high-side and low-side MOSFETs with an external SYNC input/output, and can be configured for spread-spectrum operation.The MAX20461 allows flexible configuration and advanced diagnostic options for both stand-alone and supervised applications. The device can be programmed using either external programming resistors and/or internal I²C registers through the I²C bus.The MAX20461 is available in a small, 5mm x 5mm 32-pin TQFN package. It is designed to minimize required external components and layout area.ApplicationsAutomotive Connectivity/TelematicsAutomotive Radio and NavigationUSB Port for Host and Hub Applications

The MAX20461 combines a 3A high-efficiency, automotive-grade, step-down converter, a USB Type-C/BC1.2 host charger emulator, and high-bandwidth USB protection switches for automotive USB 2.0 host applications. The device also includes a USB load current-sense amplifier and a configurable feedback-adjustment circuit that provides automatic USB voltage compensation for voltage drops in captive cables often found in automotive applications. The device limits the USB load current using both a fixed internal peak-current threshold and a user-configurable external current-sense USB load threshold.The MAX20461 is optimized for high-frequency operation and includes programmable frequency selection from 310kHz to 2.2MHz, allowing optimization of efficiency, noise, and board space based on the application requirements. The fully synchronous DC-DC converter integrates high-side and low-side MOSFETs with an external SYNC input/output, and can be configured for spread-spectrum operation.The MAX20461 allows flexible configuration and advanced diagnostic options for both stand-alone and supervised applications. The device can be programmed using either external programming resistors and/or internal I²C registers through the I²C bus.The MAX20461 is available in a small, 5mm x 5mm 32-pin TQFN package. It is designed to minimize required external components and layout area.ApplicationsAutomotive Connectivity/TelematicsAutomotive Radio and NavigationUSB Port for Host and Hub Applications

The MAX20463 is a small, integrated USB Type-C®Downstream-Facing Port (DFP) solution used to convert an existing USB-A head-unit captive-cable port to a head-unit USB Type-C captive-cable port. When the MAX20463 is designed into an automotive module at the end of the cable, then the existing upstream head-unit USB-A solution and the existing USB-A captive-cable housing can be reused.The device protection features include ±15kV/±8kV IEC 61000-4-2 ESD on CC1/CC2, and IEC ESD with short-to-battery (18V) on SENSE/HVBUS. The MAX20463A senses a short of the passenger cable shield to car battery, preventing damage to the port. Short-to-ground and short-to-battery survival are also provided on the HVBUS signal and defined to operate in concert with the existing head-unit USB-A charger/protector, allowing coordinated fault detection and reporting to the head-unit USB host.The MAX20463 is available in a small, 3mm x 3mm, 12-pin TDFN package, using very few external components.ApplicationsAutomotive Downstream USB ModulesAutomotive USB Captive-Cable Housing