iW3637 Datasheet | Renesas

i W3637 Off-line LED Driver Controller Supports Wide Range of PWM Dimming Interfaces 1 Description The i W3637 is a high-performance AC/DC power controller optimized for non-isolated buck or isolated flyback converter applications to step-down a high-voltage DC input to drive LEDs in SSL lighting applications. A converter designed with the i W3637 can work with a DC input voltage from a front-end, off-line boost converter to minimize low frequency output ripple current, and virtually eliminate all flicker in the system. It uses Renesas’ Prim Accurate™ advanced sensing technology to achieve excellent output current regulation without the need for direct voltage or current feedback ponents. It also eliminates the need for external loop pensation while maintaining stability across all operating conditions. The i W3637 offers a 1% to 100% dimming range and provides a dedicated PWM dimming input pin that supports a wide variety of dimming application interfaces such as wireless modules, MCUs or 0-10V interfaces. In addition, the i W3637 accepts a secondary PWM input to allow maximum output current configuration. Renesas’ innovative proprietary technology maximizes the i W3637 performance in an SOIC-8 package. It provides maximum design flexibility by providing two multi-function pins to configure IC functions such as the dimming curve and minimum dimming level. Additionally, the i W3637 Features a soft-off function before entering into light-off mode, where the device remains alive with minimal standby power consumption. 2 Features - Supports buck and flyback topologies with input from - Wide VCC operating range from 7.5V to 30V front-end off-line boost converter or rectified AC input - Fast dimming transient response - Enhanced MOSFET driver supports output power up to 150W in an SOIC-8 package - Built-in over-temperature protection with temperaturecurrent derating - Prim Accurate TM sensing achieves tight output current regulation (±3%) - External NTC-based...