“NCP1345 is a highly integrated quasi-resonant Flyback controller. It adopts a dual VCC architecture and allows direct connection to the auxiliary winding to simplify the number of VCC management devices and increase performance. In terms of performance, the device has built-in functions such as Brown out/in detection, over-voltage protection, over-temperature protection, and AC line voltage removal detection to ensure the safety and durability of the power supply. In addition, in order to maintain a constant voltage output, the NCP1345 has designed an output limit circuit based on the primary side, so no matter the output voltage or output power in any case, the constant output current limit can be maintained.
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On December 23, 2021, the leading distributor of semiconductor components dedicated to the Asia-Pacific market, Grand United Holdings, announced that its subsidiary Youshang has launched the Onsemi NCP1345 controller, NCP4307 synchronous rectifier controller and FUSB15101 PD protocol. The controller’s 65W PD power adapter solution.
Figure 1-The Display board of the 65W PD power adapter solution based on Onsemi products
Nowadays, Electronic devices such as mobile phones, tablets, and notebook computers have become necessities of daily life, which makes people’s demand for high-power PD power adapters steadily increasing. And under the development trend of electronic products “diversified functions and simplified interaction”, USB Type-C adapters have become major manufacturers’ advantages by virtue of the interface can be plugged in front and back, transmit high-speed data and audio and video signals, and are compatible with PD protocols. Ideal choice. The 65W PD power adapter solution based on the onsemi NCP1345 controller, NCP4307 synchronous rectification controller and FUSB15101 PD protocol controller by the Great United Friends of the United Nations can perfectly match the needs of the industry.
Figure 2-Block diagram of the 65W PD power adapter solution based on Onsemi products
NCP1345 is a highly integrated quasi-resonant Flyback controller. It adopts a dual VCC architecture and allows direct connection to the auxiliary winding to simplify the number of VCC management devices and increase performance. In terms of performance, the device has built-in functions such as Brown out/in detection, over-voltage protection, over-temperature protection, and AC line voltage removal detection to ensure the safety and durability of the power supply. In addition, in order to maintain a constant voltage output, the NCP1345 has designed an output limit circuit based on the primary side, so no matter the output voltage or output power in any case, the constant output current limit can be maintained.
Figure 3-Scene application diagram of 65W PD power adapter solution based on Onsemi products
In addition, this solution uses onsemi FUSB15101 in the PD controller. In the synchronous rectification module, it is matched with a new generation of synchronous rectification IC NCP4307. Thanks to these advanced devices, the solution has excellent performance and reliability, and can support PD3. Protocols such as 0/PPS/BC1.2, and without additional components, can complete the synchronous rectification function, which is very suitable for smart phones, tablet computers and other products.
Core technical advantages:
• QR flyback topology;
• Discharge of the internal integrated X2 capacitor;
• Wide VCC voltage range 8V~38V;
• 36.5V VCC OVP protection;
• Winding short circuit abnormal current fault detection;
• Lower no-load loss;
• The dual-pin VCC PIN structure allows direct connection to the auxiliary winding to simplify the VCC circuit and reduce the number of parts;
• Blocking or automatic-recovery overload protection;
• Fixed/adjustable maximum frequency clamp.
Scheme specifications:
• Support PD output (5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 3.25A);
• Universal AC output range (90 – 264Vac);
• The output voltage range is 3.3V-21V;
• Maximum output power: 65W;
• The average efficiency is 92% (115Vac&230Vac);
• Full load efficiency is greater than 93% (115Vac&230Vac / 20V 3.25A);
• Low standby (5V & 230Vac) power consumption is less than 75mW;
• High power density (1.15W/cm3);
• Board size: 46mm x 46mm x 19mm.
The Links: CXA-L0612-VML LM150X08
