STSR30 SYNCHRONOUS RECTIFIERS SMART DRIVERS FOR ADAPTOR FLYBACK
STSR30 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 From a synchronizing clock input, withdrawn on the secondary side of the isolation transformer, the IC generates a driving signal with set dead times with respect to the primary side PWM signal.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, detecting the voltage across the Synchronous FET, allows to shut-off the drive output during discontinuous mode condition. A Disable pin allows turning off the device during no-load condition reducing overall current consumption
技术特性
- SUPPLY VOLTAGE RANGE: 4V TO 5.5V
- TYPICAL PEAK OUTPUT CURRENT: (SOURCE-SINK: 1.5A)
- OPERATING FREQUENCY: 20 TO 500 KHz
- INHIBIT BLANKING TIME: 700 ns
- 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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STSR30 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 |
| STSR30CD-TR |
Active |
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1000 |
SO-8 |
Tape And Reel |
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| STSR30CD |
Active |
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1000 |
SO-8 |
Tube |
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DATASHEET
| 描述 |
版本 |
大小 |
| STSR30 : Synchronous rectifier smart driver for flyback |
2 |
201KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2432: EVALSTSR30-60W: 60W AC-DC adapter with synchronous rectification using L6668 and STSR30 |
2 |
644KB |
