SY23433BFHC (SY50433BFHC)
Flyback Regulator with Primary Side CV/CC Control for High Input Voltage Application
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- Parameters
- Features
- Description
| Part number |
SY23433BFHC |
| Pout (max) (W) |
7 |
| HV startup |
YES |
| Operation mode |
QR |
| Integrated FETs type |
MOS |
| Breakdown voltage (V) |
900 |
| Ron (typ) (mΩ) |
14 |
| No load loss (mW) |
<50 |
| Switching frequency (min)(kHz) |
0.5 |
| Switching frequency (max)(kHz) |
120 |
| Features |
PSR CC/CV |
| Package |
SSOP10 |
| Operating temperature range(°C) |
-40 to 125 |
| Functional safety category |
|
- Integrated 900V MOSFET
- Very Tight Primary Side CV/CC Regulation
- Quasi-resonant Mode and PWM/PFM Control for Higher Average Efficiency
- Internal CC/CV Loop Compensation
- Low Start Up Current: 5μA Max
- HV Start Up Circuit to Reduce No-load Loss
- Maximum Switching Frequency Limitation 125kHz
- VREG OVP Function for Strong Magnetic Field Test
- Reliable Protections for OCP,SCP,VCCOVP,VSEN SCP, OTP
- Compact Package: SSOP10
SY23433B is a single stage Flyback regulator targeting at high input voltage applications. It integrates 900V MOSFET to decrease physical volume. Both the output current and voltage are sensed by primary side signal process. SY23433B operates in quasi-resonant mode and adaptive PWM/PFM control for highest average efficiency. In addition, SY23433B integrates fast internal HV start up circuit to minimize no-load loss and external components. A special OVP function of VREG pin has been integrated in SY23433B to prevent the output voltage from raising too high with light load during strong magnetic field test.
Evaluation Board
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Photo of evaluation board
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Photo of evaluation board
The EVB_SY23433BFHC is used to evaluate a PWM/PFM controller with several features to enhance performance of Flyback converters that targeting at adapter or charger applications.
