STSR3 SYNCHRONOUS RECTIFIERS SMART DRIVERS FOR FLYBACK
STSR3 Smart Driver IC provides a high current outputs to properly drive secondary Power Mosfets used as Synchronous Rectifier in low output voltage, high efficiency Flyback Converters. From a synchronizing clock input, withdrawn on the secondary side of the isolation transformer, the IC generates a driving signal with set dead times with respect to the primary side PWM signal.
The IC operation prevents secondary side shoot-through conditions at turn-on of the primary switch providing anticipation in turn-off the output. This smart function is implemented by a fast cycle-after-cycle logic control mechanism, based on a high frequency oscillator synchronized by the clock signal. This anticipation is externally set through external component. A special Inhibit function allows to shut-off the drive output. This feature makes discontinuous conduction mode possible and avoids reverse conduction of the synchronous rectifier
技术特性
- SUPPLY VOLTAGE RANGE: 4V TO 5.5V
- TYPICAL PEAK OUTPUT CURRENT: (SOURCE 2A, SINK 3.5A)
- OPERATING FREQUENCY: 30 TO 750 KHz
- SMART TURN-OFF ANTICIPATION TIMING
- AUTOMATIC TURN OFF FOR DUTY CYCLE LESS THAN 14%
- POSSIBILITY TO OPERATE IN DISCONTINUOUS MODE
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功能框图
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STSR3 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| STSR3CD-TR |
NRND |
|
1000 |
SO-8 |
Tape And Reel |
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| STSR3CD |
NRND |
|
1000 |
SO-8 |
Tube |
|
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DATASHEET
| 描述 |
版本 |
大小 |
| STSR3 : Synchronous rectifiers smart driver for flyback |
4 |
274KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN1624: STSR3 simplifies implementation of synchronous rectifier in flyback converter |
2 |
607KB |
