Analysis of Infineon XDPS2201 170W Charger Prototype

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Introduction
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ChargerLAB got an XDPS2201 170W charger prototype from Infineon. It adopts a simple design of single-stage hybrid-flyback topology for 24V to 36V Li-Ion battery packs.The synchronous rectification makes the system efficiency can be up to 95% under 230V AC when fully loaded.

Bill of materials (BOM)
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Input Filtering Circuit:
Varistor: 10D561K
Safety X2 Capacitor: TDK
Bridge Rectifier: Onsemi GBU8K
Electrolytic Capacitor: Rubycon

Primary Circuit:
Master Control Chip: Infineon XDPSS2201
MOSFET: IPA60R280P7S
Filter Capacitor: WE
Optocoupler: VOL618A

Synchronous Rectification Circuit:
Synchronous Rectifier Controller: MPS MP6951
Synchronous Rectifier: Infineon BSC160N15NS5

Output Filtering Circuit:
Electrolytic Capacitor: KEMET, Rubycon
Op-Amp: TI TLV9102

Auxiliary Circuit:
Auxiliary Master Control Chip: Infineon CE5AR4770AG
Electrolytic Capacitor: Würth
Optocoupler: VOL618A
SMD Solid Capacitor: Würth