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Jicheng
@technology1688
Power Electronics Engineer
Cina
Cinese
Chi sono
I have over 11 years of experience designing fast chargers up to 140W, specializing in flyback, QR, and LLC topologies with GaN applications. I manage the full lifecycle from spec to mass production, including PCB layout and EMI troubleshooting. I have successfully developed multiple certified USB-PD chargers with peak efficiency >93%.
Competenze
Jicheng
offline •
Consulta i miei servizi
Circuito stampato (PCB)
I will 48 hour emergency response
Portfolio
Esperienza lavorativa
Full time design engineer at the factory
Anker • Full time
May 2014 - Present • 12 yrs 4 mos
65W USB-PD 3.0 charger with 1x USB-C (65W), 1x USB-C (20W), and 1x USB-A (18W). Input: 100-240V~50/60Hz. Outputs: C1 (5V/9V/12V/15V/20V @3.25A), C2 (5V/9V @2.22A, 12V @1.67A), A (5V/3A, 9V/2A, 12V/1.5A). Compliance: DoE Level VI, CoC Tier 2, Class B EMI. Quasi-Resonant (QR) Flyback with a GaN HEMT. QR offers valley-switching to reduce turn-on losses, perfectly matching GaN's low output capacitance (Coss). Operating frequency: 65kHz~130kHz A fixed 20V DC bus is generated by Stage 1. Then, three independent synchronous Buck-Boost converters (for C1, C2, A) regulate the 20V bus down to the requested PD voltage (3.3V–21V). This isolates port faults and allows independent PPS control.
