Flyback Controller with Primary Side CC/CV Control
- Parameters
- Features
- Description
| Part number | SY22817ABC |
|---|
| Pout (max) (W) | 75 |
|---|
| HV startup | NO |
|---|
| Operation mode | QR |
|---|
| Driving FETs type | MOS |
|---|
| No load loss (mW) | <75 |
|---|
| Switching frequency (min)(kHz) | 0.5 |
|---|
| Switching frequency (max)(kHz) | 125 |
|---|
| Features | PSR CC/CV,Cable compensation |
|---|
| Package | SOT23-6 |
|---|
| Operating temperature range(°C) | -40 to 125 |
|---|
| Functional safety category | |
|---|
- Tight PSR CC/CV Regulation Over Entire Operating Range
- QR-mode Operation for High Efficiency
- PWM/PFM Control for High Average Efficiency
- Fast Dynamic Load Transient Response
- Cable Compensation for Better Load Regulation
- Low Start Up Current: 5μA Max
- Minimum Frequency Limitation 500Hz
- Reliable Protections for OVP, SCP, OTP,OCP
- Reliable Protections for Safety Requirement
- Maximum Switching Frequency Limitation 125kHz
- RoHS Compliant and Halogen Free
- Compact Package: SOT23-6
Evaluation Board
Photo of evaluation board
Photo of evaluation board
SY22817 is a single stage Flyback controller targeting at Constant Current/Constant Voltage (CC/CV) applications. Both the output current and voltage are sensed on the primary side, eliminating the opto-isolator and the secondary side feedback circuitry, and minimizing the overall system cost.
