SY22728H1ADC - High Efficiency,23V,2.0A Sychronous Step Down Regulator For Dimmable LED Driver
Features
• Wide Input Range: 4V-23V
• Up to 2.0A Output Current Capability
• Low RDS(ON) for Internal Switches
High Side/Low Side:125mΩ/75mΩ
• Fixed 1MHz Switching Frequency
• Cycle by Cycle 3.5A Peak Current Limit for High Side and 2.5A Valley Current Limit for Low Side
• High Accuracy for Low Dimming Scale
• Down to 1% LED Rated Current
• Output Voltage Discharging
• Over Temperature Protection
• RoHS Compliant and Halogen Free
• Compact package: TSOT23-6
Typical Application
Description
The SY22728H1 is a high efficiency synchronous step-down LED regulator that achieves up to2.0Aoutput current. It operates at 1MHz and integrates two very low RDS(ON) power switches to minimize and reduce the external components.
Ensure PWM duty>2% and PWM high time>100ns to light the LED on then achieve 100%~0.6% linear dimming scale when PWM duty varied from 100%~1%.
Applications
• DVR Or NVR(IP Camera) System Application
• 12VDC Lighting