The NCP43080 is a synchronous rectifier controller for switch mode power supplies. The controller enables high efficiency designs for flyback, quasi resonant flyback and LLC topologies. Externally adjustable minimum off−time and on−time blanking periods provides flexibility to drive various MOSFET package types and PCB layout. A reliable and noise less operation of the SR system is insured due to the Self Synchronization feature. The NCP4308 also utilizes Kelvin connection of the driver to the MOSFET to achieve high efficiency operation at full load. The precise turn−off threshold, extremely low turn−off delay time and high sink current capability of the driver allow the maximum synchronous rectification MOSFET conduction time. The high accuracy driver and 5 V gate clamp make it ideally suited for directly driving GaN devices. To provide more flexibility in PCB layout there are two versions of this product. NCP4308 does NOT have LLD function
●Features | | Benefits
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● Self−Contained Control of Synchronous Rectifier in CCM, DCM and QR for Flyback or LLC Applications
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● Robust design during power excurtion
● Precise True Secondary Zero Current Detection
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● Provides negligible switching losses and prolongs FET life
● Rugged Current Sense Pin (up to 150 V)
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● Robustness
● Adjustable Minimum ON−Time
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● Improves efficiency and design flexibility
● Adjustable Minimum OFF-Time with Ringing Detection
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● Improves efficiency and design flexibility
● Adjustable Maximum ON−Time for CCM Controlling of Primary QR Controller
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● Improves efficiency and design flexibility
● Operating Voltage Range up to VCC = 35 V
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● Advantage with multiple Vout such as smart charging or USB-PD
● 8 A / 4 A Peak Current Sink / Source Drive Capability
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● higher drive strenght provides higher efficiency
● GaN Transistor Driving Capability (options A and C)
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● GaN FET further improve efficiency and solution size
● Low Startup Current Consumption
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● Improves standby power consumption
● Maximum Operation Frequency up to 1 MHz
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● Provides higher OFF-ON time accuracy, thus improving efficiency
● Improved Robust Self Synchronization Capability
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● These are Pb−Free Devices
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