产品说明
The NCP4302 is a full featured controller and driver that provides all the control and protection functions necessary for implementing a synchronous rectifier operation in a flyback converter. With the use of the NCP4302, the space conscious flyback applications such as Adaptors, chargers, set top boxes can achieve significant efficiency improvements at minimal extra cost. In addition to the synchronous rectifier control, the IC incorporates an accurate TL431 type shunt regulator, current monitoring circuit and optocoupler driver to provide a single IC secondary solution. The NCP4302 works with any type of flyback topology (continuous mode, Quasi resonant mode or discontinuous mode) providing a high level of versatility.
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特性 |
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优势 |
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Self contained Control of Synchronous Rectifier in CCM, DCM, and QR Flyback Applications
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Single IC secondary solution
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Integrated controller and driver; wide operating voltage
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Ease of implementation and simplified system design
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Built-in voltage referfence (TL431 functionality)
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Fewer components, reduced system cost
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True Secondary Zero Current Detection
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High Gate Drive Currents (2.5 A Source/Sink)
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Current Sense Flexibility (MOSFET RDS(on) OR CS Resistor)
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Accurate Low Voltage Reference, 1%
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Programmable Independent Secondary Side ton and toff Delays
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Maximum Frequency of Operation up to 250 kHz
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应用 |
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终端产品 |
- Notebook Adapters
- LCD TV Adapters
- Power Over Ethernet Applications (IP phones, Wireless Access Points)
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- Consumer Appliances such as DVD, VCR
- Battery Chargers
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