With the official launch of the iPhone 12, there is no longer a standard headset and charger, and there is no standard charger. This is also a business opportunity for charger manufacturers. After the release of the iPhone 12, the demand for chargers on major platforms has skyrocketed. The demand for charger manufacturers is in short supply, and Li Microelectronics has launched an ultra-simplified small-size PD 20W fast charging solution based on PN8162+PN8307H!
PN8162 integrates quasi-resonant working mode current mode controller and power MOSFET, dedicated to high-performance, simplified peripheral components of AC-DC switching power supply, this chip provides extremely comprehensive and excellent performance protection functions, including output overvoltage Protection, cycle-by-cycle overcurrent protection, overload protection, soft start, input undervoltage protection functions. Through the three-mode hybrid modulation technology of QR-PWM, QR-PFM, and Burst-mode and the low-power structure technology of special devices, ultra-low standby power consumption and best efficiency under the full voltage range are achieved. Frequency modulation technology and Soft Driver technology fully guarantee good EMI performance.
PN8307H includes a synchronous rectifier controller and a high avalanche power MOSFET, which is used to replace the secondary rectified Schottky diode in a high-performance AC/DC flyback system. PN8307H has built-in power MOSFET with extremely low voltage drop to increase current output and improve conversion efficiency, so that the system efficiency can meet the 6-level energy efficiency standard, and there is enough margin. PN8307H integrates a very comprehensive auxiliary function, including output under-voltage protection, anti-error opening, minimum on-time and other functions.
Highlights of PD 20W fast charging solution
★ The primary side main control PN8162 and the secondary side synchronous PN8307H both realize power integration. Thanks to the patented intelligent MOS technology, it saves multiple peripherals such as start-up resistance and CS detection resistance. PCBA size: 28mm 28mm 24mm;
★ PN8162 adopts PDFN special power package. Compared with traditional SOP8, the package thermal resistance is reduced from 80℃/W to 15℃/W, which significantly improves the power density of the charger; single-sided drain pin, high and low voltage pin creepage distance is greater than 1.2 mm, safe and reliable;
★ PN8162 adopts load adaptive valley opening technology to completely solve the conduction problem caused by the displacement current of the small-sized charger switch interference source to the LN line, and the EMC margin is greater than 6dB;
★ PN8162 works in forced DCM mode to ensure that the SR peak voltage can be controlled within 51V under the worst conditions. The 60V withstand voltage of PN8307 can ensure sufficient voltage de-rating margin, thereby reducing the overall cost of the solution;
★ PN8162 has built-in input under-voltage protection, and monitors the mains power through DMG to prevent abnormal power supply caused by low-voltage work in the city;
★ PN8162 9-38V VDD power supply, PN8307 3-24V VCC power supply, no external LDO is required within the 3-12V output voltage range;
★ PN8162 has built-in line voltage compensation, automatically adjusts the internal peak current reference according to the mains, and the OCP accuracy of the full voltage range is within 10%;
★ HUSB339B protocol supports PD3.0, PD2.0, QC3.0/QC2.0, AFC, FCP, BC1.2 DCP and 5V2.4A.
The 20W PD fast charging solution uses the highly integrated chip PN8162+PN8307H, supports 12V1.67A; 9V2.22A; 5V3A output, built-in mos power chip and fast charging chip, the solution is very compact, and minimizes chip peripheral components The high-density 20W PD fast charging solution has obvious advantages in competitiveness. >>