onductorThe GN1637 LED Driver SOP-20 RoHS from GN Semiconductor is a high-efficiency, low-power, 3-channel, DC/DC converter designed for the efficient control of LEDs. The device has three channels of output with programmable current regulation, and can drive up to three strings of LEDs from a single LED supply with a voltage range of up to 20V. It is optimized for high efficiency, with a power efficiency of up to 96%. The GN1637 features a wide input voltage range of 4.5V to 20V and an adjustable output current range of 10 mA to 250 mA. The output can be configured in series, parallel, or a combination of both. The device supports dimming via a single PWM signal on the EN terminal, allowing the LED current to be smoothly adjusted. The GN1637 is available in a RoHS compliant SOP-20 package and is compliant with the USP Class 1 standard.