SY22728H1ADC - High Efficiency,23V,2.0A Sychronous Step Down Regulator For Dimmable LED Driver


     • 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


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%.


DVR Or NVR(IP Camera) System Application
12VDC Lighting