4/30/2023 0 Comments Netherlands time converter![]() The hybrid dimming feature can beĮnabled through a register bit to reduce EMI. The desired dimming frequency and individual dutyĬycle through I 2C. Signal applied to the DIM pad or internally by programming Level, thermal shutdown, phase-shifted pulse-widthmodulationĭimming can be performed either externally using a PWM IC’s other features, such as adjustable output voltage,Įxtensive diagnostics to aid in fulfilling ASIL-B safety Supply voltage of 3V up to the High-Brightness (HB) LED The LED driver portion of the EV kit operates from a DC Regulator capable of providing up to 900mA for theĬurrent sinks. The step-up pre-regulator switches atĢ.2MHz or 400kHz and operates as a current-mode controlled The HB LED Driver Section demonstrates a step-upĭC-DC pre-regulator followed by six channels of linearĬurrent sinks. Or in Unipolar Mode from 12.6V to 31.5V (VGON), and Pumps that generate in Bipolar Mode from 8.4V to 21V Gate-driver power supplies consist of regulated charge The boost converter and provides up to 200mA. Generates a negative output that tracks the voltage of (HVINP) is configured in bipolar Mode from 4.9V toġ0.5V or in unipolar Mode from 11.7V to 18V output that The TFT-LCD Power Section of the EV kit operates fromĪ 2.65V to 5.5V DC supply voltage. The EV kit can be configured to operate in a stand-alone Gate-voltage controllers (VG ON), and (VG OFF), and aīoost converter that powers a six-string LED driver. Mode inverting regulator (NAVDD), positive and negative With sequencing switch (HVINP–AVDD), one current ![]() TheĮV kit demonstrates one current-mode boost converter Power-management solution for automotive displays. The EV kit is a fully assembledĪnd tested surface-mount PCB that provides a complete Power supply plus LED backlight driver for automotive MAX25069/MAX25169 IC, which is a highly integrated The MAX25169 evaluation kit (EV kit) demonstrates the Automotive Central Information Displays.The MAX25069 is available in a 7mm x 7mm, 48-pin TQFN package with an exposed pad, and operates over the -40☌ to +125☌ ambient temperature range. The startup and shutdown sequences for all power domains are controlled using one of the eight preset modes, which are selectable using internal nonvolatile memory or through the I 2C interface. With phase shifting disabled, the current sinks turn on simultaneously and parallel connection of current sinks is possible. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple, as well as audible noise. ![]() Logic-controlled and I 2C-controlled pulse-width modulation (PWM) dimming are included, with minimum pulse widths as low as 300ns and the option of phase shifting the LED strings with respect to one another. The IC features a 6-string LED driver with input switch control (NGATE) that can power up to 6 strings of LEDs with 150mA (max) of current per string. The gate-driver power supplies consist of regulated charge pumps that generate up to +31.5V and down to -18V and can deliver up to 15mA each. The source-driver supplies operate from an input voltage between 2.65V and 5.5V. The negative source-driver supply voltage (V NAVDD) is always tightly regulated to -V AVDD. The positive source-driver supply-regulation voltage (V AVDD) is set using internal NV memory or through I 2C. The AVDD output can deliver up to 300mA at 13.5V, while NAVDD can provide up to 200mA. The source-driver power supplies consist of a boost converter which can provide up to +18V in unipolar mode and an inverting buck-boost converter that can generate a voltage down to -10.5V. ![]() This IC integrates one boost converter, one inverting buck-boost converter, two gate-driver supplies, and a boost/SEPIC controller that can power 1 to 6 strings of LEDs in the display backlight. ![]() The MAX25069 is a highly integrated TFT power supply and LED backlight driver IC for automotive TFT-LCD applications. ![]()
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