MAX20446BATG/V+

MAX20446 & MAX20446B 6-Channel Backlight Drivers

Analog Devices Inc. MAX20446 and MAX20446B 6-Channel Backlight Drivers have a boost controller for automotive displays. The integrated current outputs can sink up to 130mA LED current each. The devices accept a wide 4.5V to 36V input voltage range and withstand direct automotive load-dump events. The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates from 400kHz to 2.2MHz. The integrated spread spectrum helps reduce EMI. An adaptive output-voltage control scheme minimizes power dissipation in the LED current-sink paths. The devices feature an I²C-controlled pulse-width modulation (PWM) dimming and hybrid dimming. ADI MAX20446 and MAX20446B 6-Channel Backlight Drivers’ minimum pulse width is 500ns. Phase-shifted dimming of the strings is incorporated for lower EMI.

IS32LT3175N/P Single-Channel Linear LED Drivers

ISSI IS32LT3175N/P Single-Channel Linear LED Drivers come with fade in/out and PWM dimming. The regulators serve as a stand-alone LED driver-configurable from 20mA to 150mA with external resistors, no microcontroller is necessary. A logic level “courtesy light” signal from the PWM pin can be interfaced to precisely drive the LED channel. The IS32LT3175P obtains a positive polarity PWM signal. In addition, the IS32LT3175N obtains a negative polarity PWM signal. The regulator integrates a 63-step fade-in and fades out the algorithm (Gamma correction). This causes the output LED current to increasingly rise up to the full source value after the EN pin is pulsed.

Optical ADI SLP