SY22728H1ADC (SY8718H1ADC)

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

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

Parameters
Features
Description

Part number	SY22728H1ADC
Description	Sync. buck CC with 23V/125mΩ & 23V/75mΩ MOS, analog dimming, small dimming scale accuracy down to 1%
Channel(#)	1
Topology	Buck
Dimming mode	PWM
Fsw(kHz)	1000
Vin (min) (V)	4
Vin (max) (V)	23
Iout (max) (A)	1.5
Package	TSOT23-6
Application	IR LED

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

The SY22728H1 is a high efficiency synchronous step-down LED regulator that can deliver up to 2.0A output current. It operates at 1MHz and integrates two very low RDS(ON) power switches to minimize losses and reduce the external components.

The LED intensity can be changed by an external PWM. Using a PWM signal with a duty cycle between 1% and 100%, the LED current can be adjusted on a linear scale between 0.6% and 100%.

Evaluation Board

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SY22728H1ADC

EVB File

The EVB_SY22728H1ADC is intended for evaluating High Efficiency,23V,2A Synchronous Step Down Regulator For Dimmable LED Driver

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12
TSOT23-6	2022-05-20