| Part number | SY22729TQD |
|---|---|
| Description | Sync. buck with 28V/200mΩ & 28V/200mΩ MOS, analog dimming, small dimming scale accuracy down to 0.1% |
| Channel(#) | 1 |
| Topology | Buck |
| Dimming mode | 1-wire |
| Fsw(kHz) | 1800 |
| Vin (min) (V) | 4.5 |
| Vin (max) (V) | 28 |
| Iout (max) (A) | 1 |
| Package | DFN1.8×1.4-6 |
| Application | IR LED |
● 4.5V to 28V Input Voltage Range
● Up to 1A Output Current Capability
● Low RDSON for Internal Switches:
High/Low Side: 200mΩ/200mΩ
● Up to 1.8MHz Switching Frequency
● Auto Frequency Reduction to Apply Small or Large Conversion Ratio Application
● Cycle by Cycle Peak Current Limit for High Side Switch and Valley Current Limit for Low Side Switch
● One-Wire Dimming on the CTRL Pin
● Down to 0.1% Dimming Scale
● Output Voltage Discharging
● Open/Short LED Protection
● Over Temperature Protection
● Compact Package: DFN 1.8mm×1.4mm-6
SY22729, high efficiency synchronous step-down LED regulator that achieves up to 1A output current. It operates at 1.8MHz (maximum) and integrates two low RDSON power MOSFETs to minimize and reduce the external components.
The SY22729 provides the one-wire dimming on the CTRL pin, which dimming duty from 0.1%-100% to achieve dimmable LED lighting application.
The SY22729 also provides open/short LED, and over temperature protection.
| Title | Date |
|---|---|
| Silergy_Catalog_Q3_2026 | 2026-11-04 |
