MAX25601AATJ/VY+

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.

MAX25601A/B/C/D Boost-Buck Controller

Analog Devices Inc. MAX25601A/MAX25601B/MAX25601C/MAX25601D Synchronous Boost-Buck Controller is a synchronous boost controller followed by a synchronous buck LED controller. The boost controller's 4.5V to 40V input voltage range is ideal for automotive applications and acts as a pre-boost power supply for the second-stage buck LED controller. The synchronous boost is a current-mode controller that can be paralleled with another device to provide higher output power. A SYNC OUT pin provides the clock to drive the other device's RT/SYNC IN pin, enabling two-phase 180-degree out-of-phase operation. The boost converter can be programmed with a switching frequency of 200kHz to 2.2MHz. A spread spectrum is included to reduce EMI. An internal digital soft-start feature enables a smooth power-up of the boost output. Protection features like hiccup mode, overvoltage protection, and thermal shutdown are provided.

Optical ADI SLP