• Input Range: 33V-92V
• Wide Analog Dimming Range: 400:1
• Excellent Dimming Accuracy: ±5%@25~100% ±25%@0.25%
• Gate Driver: Source 8.8Ωand Sink 3.7Ω
• Programmable Switching frequency: 20kHz~500kHz
• Support Synchronous and Non-synchronous Buck
• CC/CV Operation for Open LED and Short LED
• Reliable Single-fault Protection  Compact Package: SOP16 

SY22671 is a high efficiency, 33V-92V wide input voltage range synchronous/non-synchronous step-down DC-DC constant current and constant voltage controller targeting at precision dimming LED driver. The device operates at the proprietary control with constant off-time architecture to eases the design of loop compensation while maintaining the converter to be operated at nearly constant switching frequency. It adopts proprietary PWM dimming logic and low offset error amplifier to achieve extra wide dimming range of 400:1 analog dimming and high precision for all loading range. 

SY22671 provides reliable single-fault protections for safety requirement such as Short Circuit Protection (SCP), Open LED Protection (OLP), inductor shorted protection, Top MOS short protection and ISEN shorted protection, etc.