NCP439

NCP439: Load Switch, Very Low Ron, with Low Vin, 2.0 A; 1.0 V - 3.6 V operating range\n37 mOhms RDSON at 1.8 V\nDC current up to 2 A\nOutput Auto-discharge\nEnable logic pin\nWLCSP4 0.96x 0.96 mm\nPortable devices\nPortable devices\n;

The NCP439 is a very low Ron MOSFET controlled by external logic pin, allowing optimization of battery life, and portable device autonomy. Indeed, thanks to a current consumption optimization with PMOS structure at low input voltage, leakage currents are eliminated by isolating connected IC on the battery when not used. Output discharge path is availabale when part is off.

NCP439

2A Very Low Ron Switches at Low Vin Voltage

NCP439

2A Very Low Ron Switches at Low Vin Voltage

NCP4390

谐振控制器，同步整流器控制，增强式轻负载; • Charge Current Control\n• Excellent Transient response and Easy feedback Loop Design\n• Adaptive SR with Dual edge Tracking\n• Best In Class Efficiency\n• Green Functions, provide wider PWM mode entry level including PWM disable\n• Improved Light Load Efficiency\n• Closed Loop Soft-Start\n• Monotonic Rising Output\n• Programmable dead times\n• Reliable and flexible design\n• Non-ZVS Protection\n• High system reliability\n• Wide Operating Frequency (39 kHz ~ 690 kHz)\n• Protection Functions with Auto-Restart- Over-Current Protection (OCP)- Output Short Protection (OSP)- Power Limit by Compensation Cutback (Frequency Shift)- Overload Protection (OLP) with Programmable Shutdown Delay Time- Over-Temperature Protection (OTP)\n• Wide Operating Temperature Range -40°C to +125°C\n;

The NCP4390 is an advanced Pulse Frequency Modulated (PFM) controller for LLC resonant converters with Synchronous Rectification (SR) that offers best in class efficiency for isolated DC/DC converters. It employs a current mode control technique based on a charge control, where the triangular waveform from the oscillator is combined with the integrated switch current information to determine the switching frequency. This provides a better control-to-output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability. Closed-loop soft-start prevents saturation of the error amplifier and allows monotonic rising of the output voltage regardless of load condition. A dual edge tracking adaptive dead time control minimizes the body diode conduction time thus maximizing efficiency.

NCP4390

Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control

TheNCP4390isanadvancedPulseFrequencyModulated(PFM) controllerforLLCresonantconverterswithSynchronous Rectification(SR)thatoffersbestinclassefficiencyforisolated DC/DCconverters.Itemploysacurrentmodecontroltechniquebased onachargecontrol,wherethetriangular

NCP4390_V01

Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control

TheNCP4390isanadvancedPulseFrequencyModulated(PFM) controllerforLLCresonantconverterswithSynchronous Rectification(SR)thatoffersbestinclassefficiencyforisolated DC/DCconverters.Itemploysacurrentmodecontroltechniquebased onachargecontrol,wherethetriangular

NCP4390DR2G

丝印：NCP4390；Package：SOIC-16；Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control

TheNCP4390isanadvancedPulseFrequencyModulated(PFM) controllerforLLCresonantconverterswithSynchronous Rectification(SR)thatoffersbestinclassefficiencyforisolated DC/DCconverters.Itemploysacurrentmodecontroltechniquebased onachargecontrol,wherethetriangular

NCP439_16

2A Very Low Ron Switches at Low Vin Voltage

NCP4390

Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control

NCP4390DR2G

丝印：NCP4390；Package：SOIC-16；Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control