High Efficiency, 33–92V, Step-Down Regulator
for Precision Dimming LED Driver
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- Parameters
- Features
- Description
| Part number |
SY22673FFP |
| Description |
Buck CC regulator, precision analog dimming with 100V/150mΩ MOS |
| Channel(#) |
1 |
| Topology |
Buck |
| Dimming mode |
Analog |
| Fsw(kHz) |
Adj. |
| Vin (min) (V) |
33 |
| Vin (max) (V) |
92 |
| Iout (max) (A) |
1.5 |
| Package |
SOP16 |
| Application |
DC CC buck |
- Input Range: 33V-92V
- Low RDSON for Internal Top Switch:150mΩ
- Wide Analog Dimming Range: 400:1
- Excellent Dimming Accuracy ±5%@25–100% ±25%@0.25%
- Programmable Switching Frequency: 20kHz–500kHz
- Constant Current (CC) and Constant Voltage (CV) Operation for Open LED and Shorted LED
- Reliable Single-Fault Protection
- Compact Package: SOP16
The SY22673 is a high efficiency step-down DC-DC constant current and constant voltage regulator designed for precision dimming LED lighting applications. It operates over a wide 33V–92V input voltage range and integrates a 100V MOSFET to decrease physical size. The SY22673 operates using proprietary control with constant off-time architecture to simplify loop compensation design while allowing the converter to operate at a nearly constant switching frequency. It adopts proprietary PWM dimming logic and a low offset error amplifier to achieve a wide dimming range of 400:1 analog dimming, and high precision for all loading ranges.
The SY22673 provides reliable single-fault protections including short-circuit protection (SCP), open LED protection (OLP), inductor shorted protection, and ISEN shorted protection. The SY22673 is available in a compact SOP16 package.
Evaluation Board
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Photo of evaluation board
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Photo of evaluation board
The EVB_SY22673FFP is intended for evaluating High Efficiency, 33~92V, Step-down Regulator for Precision Dimming LED Driver
