NCP1340+NCP43080 5.25V 8A
● This design note describes a 42 watt, universal AC input, constant voltage power supply intended for smart phone charger, where isolation from the AC mains is required, and low cost, high efficiency, and low standby power are essential.
● The featured power supply is a simple QR flyback topology utilizing ON Semiconductor's NCP1340B3 HF PWM controller, NCP43080D synchronous rectified controller. This Design Note provides the complete circuit schematic details, PCB and BOM for 42W NCP1340+NCP43080 5.25V8A solution which supports 5.25V8A output. The NCP1340B3 is used as an error amplifier provides for excellent line and load regulation with high input-to-output safety isolation.
● Performance characteristics for efficiency, output ripple, Startup and Rise time, Drain Voltage, OCP, Synchronic drive, Primary & Secondary MOSFET drain voltage, Transient Response Test and Thermal Image are shown in the figures and plots below.
■ Key Features
● Universal AC input range (90 –264 Vac)
● Very low standbypower consumption
● Very low ripple and noise
● Inherent SCP and OCP protection
● Adjustable Overpower Protection
● High power density (1.25W/cm3)
● Built in 4ms soft start
● Quasi-Resonant current mode control with Valley Switching
● Valley lockout avoids audible noise at valley jumping operation
● Fixed or Adjustable Maximum Frequency Clamp
● Frequency Jittering for Reduced EMI Signature
● Output OCP, SCP, controller OTP function
● Abnormal Overcurrent Fault Protection for Winding Short Circuit or saturation Detection
● Provide open loop protection
● Brown out detection
● Board size: 40mmx40mmx21mm
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NCP1340 、 NCP43080 、 NCP1340B3 、 NCP43080D 、 750343575 、 NTMFS5C604 |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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August 2017 |
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Rev. 0 |
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DN05101/D |
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1.3 MB |
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