NCP1568 USB-PD Evaluation Board
■ This design notes describes a 60 W universal input 5 V, 9 V, 12 V, 15 V and 20 V output evaluation board for laptop adapters. This featured power supply is an active-clamp flyback topology utilizing ON Semiconductor’s NCP1568 PWM controller, NCP51530 HB Driver, NCP4305 SR Controller and FDMS86202 SR FET. This design note provides complete circuit schematic, PCB, BOM and transformer information of the evaluation board. It also provide efficiency, transient response, output ripple and thermal data of the evaluation board.
■ This design utilized NCP1568 and NCP51530 for the active clamp flyback topology. Active clamp flyback topology effectively recycles the leakage energy. Another feature of this topology is the ZVS operation of the power MOSFETS. Because of no leakage losses and ZVS operation, this topology is suited for high frequency operation which results in size reduction of the transformer. Hence Active clamp flyback topology is well suited for high power density sub 100 W power supplies. A ZVS fixed switching frequency power converter also simplifies EMI design and can be easily designed to avoid interference with other sensitive circuits in the system.
■ NCP1568 is a highly integrated Ac-Dc PWM controller designed to implement an active clamp flyback topology. It features adaptive frequency scheme which optimizes frequency of operation and hence the efficiency over all load and input voltages. The NCP1568 features a HV startup circuit along. It also has integrated X2 discharge circuit.
■ NCP51530 is a 700 V high side and low side driver with 2 A current drive capability for AC-DC power supplies and inverters. NCP51530 offers best in class propagation delay, low quiescent current and low switching current at high frequencies of operation. This device is tailored for highly efficient power supplies operating at high frequencies.
■ NCP4305 is high performance driver tailored to control a synchronous rectification MOSFET in switch mode power supplies.
■ NCP4328 is a secondary side SMPS controller with wide operating voltage range, designed for use in constant current and/or constant current regulation.
●Key Features:
■Universal AC input operation (90 -265 Vac)
■High full load and average efficiency
■Low standby power
■Very low ripple and noise
■High frequency operation up to 450 kHz
■Inherent SCP and OCP protection
■Thermal and OVP protection
■Adaptive frequency operation based on AC input and output load conditions
■Adaptive ZVS operation.
■Smaller EMI components.
■Multiple probe points for evaluation•Smooth startup operation
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USB-PD Evaluation Board 、 high performance driver 、 secondary side SMPS controller |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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May, 2020 |
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Rev. 2 |
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DN05114/D |
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3.1 MB |
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