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  Asymmetric half-bridge AC-DC power management chip from Teco as aThe industry's only fully encapsulated single-chip AHB solution, with far fewer peripherals than competing solutions, low debugging difficulty, and overall costs far lower than competing solutions.

  In this article, we will present a paper based on theA 140W PD solution centered on the Dongke AHB chipIt features a minimalist periphery, high power density, and diverse output configurations, making it suitable for a wide range of application scenarios, such as laptop and tablet adapters, two-wheeled electric vehicle chargers, LED power supplies, and more.

 

 

 

Dongke 140W AHB PD Program Sample Version

 

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Program overview

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Eastco Semiconductor's 140W AHB PD solution utilizes thedk8715bd+dk5v100r05vmSleeve material, using Dongke asymmetric half-bridge AC-DC power switching chip. The solution supports a variety of output voltage and current configurations to meet the needs of different devices, and has a comprehensive protection mechanism to ensure safe use.

 

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Program features

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▪ High efficiency -End-of-board efficiency up to 95.4%

▪ High power density: Bare metal power density of 1.82W/cm³.

▪ PCBA size: 66*51*24mm

▪ Upper tube adaptive shutdown, lower tube adaptive deadband, no peripheral adjustment required;

▪ Full load segment ZVS;

▪ Adaptive four load segment modes, effectively improving the efficiency of each load segment;

▪ Adaptive dead time adjustment algorithm;

▪ Built-in high-voltage starting and X-capacitor discharging circuits;

▪ CS negative pressure sampling for enhanced drive stability;

▪ Built-in full-range dither circuit to improve EMI performance;

▪ On the marketThe simplest asymmetric half-bridge solution.

 

Versatile Output Configurations.

     The program supports5v3a,9v3a,12v3a,15v3a,20v5a, 28v5aThe output configuration is able to meet the needs of most electronic devices. Its high power density design results in a bare metal power density of 1.82W/cm³, further enhancing the product's compactness and efficiency.

 

Major Chip:

AC-DC: DK8715BD

Synchronous rectifier: DK5V100R05VM

 

 

 

DK8715BD Product Description

 

 

 

 

 

 

DK5V100R05VM Product Description

 

 

 

 

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application scenario

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East Tech Semiconductor's 140W AHB solution is suitable for a variety of scenarios, including but not limited to:

▪ Laptop and tablet adapters;

▪ TV power supply, LED power supply, communication power supply;

▪ Chargers for two-wheeled electric vehicles, etc.

 

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Partial test data

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Average efficiency:

 

Output voltage ripple:

▪ Output 28V/5A

X capacitor discharge waveform:

AHB operating waveform:

MOS tube stress and SR rectifier withstand voltage

▪ Test conditions: input 264Vac, output 28V5A, switching tube VDS voltage and SR rectifier voltage

 

Primary Power Tube and SR Rectifier Voltages During Power-Up Transients

Test conditions: input 264Vac, output 20V2.25A, switching tube VDS voltage and SR rectifier voltage.

Test conditions: Input 264Vac, Output 20V0A , Switching Tube VDS Voltage and SR Rectifier Voltage

 

EMC Conductivity Testing

 

EMC Radiation Testing

 

    If you are interested in the above AHB 140W PD program, please feel free to contact our sales team and we willProvide a full set of design and test dataThis makes it easy for you to quickly develop products and bring them to market.

    Thank you for your interest in TECO Semiconductor and we look forward to working with you in the future!

 

Past Review

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