| Part number | SY22170DFD |
|---|---|
| Description | 4 CH Current Sink with One Wire Interface Mini LED Driver, VLED<30V |
| Channel(#) | 4 |
| Topology | Current sink |
| Dimming mode | PWM |
| Fsw(kHz) | 30 |
| Vin (min) (V) | 3.05 |
| Vin (max) (V) | 3.6 |
| Iout (max) (A) | 0.07 |
| Package | DFN2× 2-8 |
| Application | TV mini LED backlight |
· 3.05V to 3.6V Input Voltage Range
· 0V to 30V LED Channel Pin Voltage Range
· Current Accuracy ±3% (10mA to 100mA)
· 0.6V Headroom Voltage for Current Sink
· 10-bit to 13-bit Local PWM Dimming
· Support for 3.91kHz or 2.6kHz PWM Frequency ( at Max 13-Bit Resolution)
· 1-Bit LED Current Rising Slew Rate Selection
· 8-Bit Global Phase-Shift Configuration for Synchronization Control
· 1-Bit Channel Turn-On Delay Selection
· 10-Bit PWM Pulse Configuration for PWM Mask
· 32MHz Internal Clock
· 2.6kHz to 31.25kHz PWM Dimming Frequencies
· Internal LED Short, LED Open, and Overtemperature (OTP) Protections
· Headroom Voltage Feedback using SDI Pin
· Support for 0.5Mbps/1Mbps/1.5Mbps/2Mbps 1-Wire Interface Speed
· Compact Package: DFN2mmx2mm-8
The SY22170 4-channel LED driver, integrates 30V current sinks capable of delivering up to 100mA of continuous output current. It provides flexible LED brightness control through 8-bit analog dimming and 10-bit to 13-bit local pulse-width modulation (PWM) dimming. The SY22170 offers a 1-wire interface for flexible control. An internal 32MHz clock controls the LED current by using PWM ranging from 2.6kHz to 31.25kHz.
Built-in protections such as LED short, LED open and overtemperature are provided to ensure reliable operation.
Multiple parts can be daisy-chained to increase the number of LED channels, offering a compact solution for large LCD displays.
The SY22170 is available in a compact DFN2x2-8 package, with a pinout designed to support single-layer PCB design.
| Title | Date |
|---|---|
| Silergy_Catalog_Q3_2026 | 2026-11-04 |
