Automotive 3-Channel Display Bias IC with VCOM Buffer, Level Shifter, and IC Interface

The MAX20067/MAX20067B are complete TFT bias solution for automotive applications. It includes a current-mode boost converter and two push-pull charge-pump drivers.

The IC also includes a gate-shading push-pull level shifter that can be used to improve display uniformity (when needed), and a DAC and VCOM buffer. All blocks on the IC can be used in stand-alone mode or through the I2C interface.

Comprehensive control functions are included using the built-in I2C interface, as well as diagnostics and monitoring.

The IC is intended to operate with 2.7V to 5.5V supplies.

The MAX20067/MAX20067B are available in a 32-pin TQFN package and operates in the -40°C to +105°C temperature range.

Applications

* Central Information Displays * Infotainment Displays * Instrument Clusters

* Versatile TFT Display Power Section

* IIntegrated Synchronous Boost Converter with Output Voltages Up to 18V and High-power (MAX20067) or Lower-power (MAX20067B) Options

* Integrated Charge-Pump Drivers for the VGON (+36V, max) and VGOFF (-24V, min) Outputs

* Low EMI Operation

* Programmable Switching Frequencies of 440kHz or 2.2MHz

* Programmable Spread Spectrum

* Full Sequencing Flexibility Through I2C, Along with Preset Sequences Using SEQ Pin

* Extended Diagnostics Using I2C Interface

* Undervoltage/Overvoltage on HVINP, VGON, and VGOFF

* Overcurrent on AVDD

* Temperature Warning

* Built-In Gate-Shading Circuit Controlled by CTL Input

* 8-Bit DAC-Controlled VCOM Buffer

* Robust

* -40°C to +105°C Operating Temperature Range

* Internal Temperature Shutdown

* AEC-Q100 Qualified

* Compact 32-Pin (5mm × 5mm) TQFN Package