LT3922EUFD#PBF

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

LT3922 2A Synchronous Step-Up LED Drivers

Analog Devices Inc. LT3922 2A Synchronous Step-Up LED Drivers are monolithic converters with a fixed-frequency, peak current control, and PWM dimming for a string of LEDs. The LT3922 can operate in boost, buck, or buck-boost modes. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. Analog Devices Inc. LT3922 Drivers will maintain ±2% current regulation through an external sense resistor over a wide range of output voltages.