ZVS Flyback SR Controller
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- Parameters
- Features
- Description
| Part number |
SQ33239FPP |
| Topology |
Flyback |
| Integrated FETs(Yes/No) |
NO |
| Integrated FETs type |
|
| Drain current (Conti.) (A) |
|
| Breakdown voltage (V) |
130V |
| Ron (typ) (mΩ) |
|
| ZVS function |
YES |
| Operation mode |
QR/DCM |
| Dual supply channel |
YES |
| Features |
Adaptive gate voltage control,DSEN voltage falling slope rate detection,Power saving mode,Wide Vout |
| Package |
CPC8 |
| Operating temperature range(°C) |
-40 to 125 |
| Functional safety category |
|
- Proprietary Operation Mode for Flyback ZVS
- Adaptive Gate Voltage Control
- DSEN Falling Slope Rate Detecting to Prevent SR False Triggering
- 130V DSEN Pin to Directly Sense DRAIN Voltage of SR MOSET
- Power Saving Mode to Improve Light Load Efficiency
- Dual Power Supply Channel for 3.3V to 21V Output Systems
- Compact Package: CPC8
The SQ33239 is a Flyback synchronous rectifier (SR) controller compatible with quasi-resonant (QR) mode converters, used to achieve zero voltage switching (ZVS) operation. The device is designed to complement primary side PWM converters operating in the QR mode.
Using a proprietary architecture, SQ33239 enables Flyback ZVS turn on, which can greatly improve the efficiency and increase the power density, while using adaptive gate voltage control to ensure system reliability.
The SQ33239 uses DRAIN sense (DSEN) voltage falling slope rate detection to avoid SR MOSFET false turn on caused by parasitic ringing in discontinuous conduction mode (DCM) or QR mode.
The SQ33239 is available in a CPC8 package.
Evaluation Board
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Photo of evaluation board
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Photo of evaluation board
The EVB_SQ33239FPP is intended for evaluating ZVS Flyback SR Controller
