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Evaluation Board, Power Adapter, 57W, Current Mode Controller


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Technical Datasheet:
NCP1351ADAPGEVB   Datasheet
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Product Overview

The NCP1351ADAPGEVB is a 57W adapter evaluation board for NCP1351 current mode controller. The NCP1351 targets low power off line flyback switched mode power supplies where cost is of utmost importance. Based on a fixed peak current technique (quasi fixed TON), the controller decreases its switching frequency as the load becomes lighter. As a result, a power supply using the NCP1351 naturally offers excellent no load power consumption, while optimizing the efficiency in other loading conditions. When the frequency decreases, the peak current is gradually reduced down to approximately 30% of the maximum peak current to prevent transformer mechanical resonance. The risk of acoustic noise is thus greatly diminished while keeping good standby power performance.
  • Quasi fixed TON, variable TOFF current mode control
  • Frequency foldback with peak current compression
  • Short circuit protection
  • Primary or secondary side regulation
  • Dedicated latch input for OTP, OVP
  • It has low start up current
  • Natural frequency jittering
  • Noise free and improved efficiency in light load
  • Negative current sensing with programmable current sense resistor
  • Independent of the auxiliary winding


Power Management, Consumer Electronics, Portable Devices


Be careful when manipulating the boards in operation, lethal voltages up to 400V are present on the primary side. An isolation transformer is also recommended for safer manipulations.

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Power Management

Current Mode Controller

Evaluation Board NCP1351


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Technical Documents (2)

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