• Input Range: 33V-92V
• Low RDSON for Internal Top Switch:150mΩ
• Wide Analog Dimming Range: 400:1
• Excellent Dimming Accuracy ±5%@25–100% ±25%@0.25%
• Programmable Switching Frequency: 20kHz–500kHz
• Constant Current (CC) and Constant Voltage (CV) Operation for Open LED and Shorted LED
• Reliable Single-Fault Protection
• Compact Package: SOP16 

The SY22673 is a high efficiency step-down DC-DC constant current and constant voltage regulator designed for precision dimming LED lighting applications. It operates over a wide 33V–92V input voltage range and integrates a 100V MOSFET to decrease physical size. The SY22673 operates using proprietary control with constant off-time architecture to simplify loop compensation design while allowing the converter to operate at a nearly constant switching frequency. It adopts proprietary PWM dimming logic and a low offset error amplifier to achieve a wide dimming range of 400:1 analog dimming, and high precision for all loading ranges.

The SY22673 provides reliable single-fault protections including short-circuit protection (SCP), open LED protection (OLP), inductor shorted protection, and ISEN shorted protection. The SY22673 is available in a compact SOP16 package.