Driver circuits

Introduced: January 2020

Full Title

Circuit arrangements for operating light-emitting diodes [LED] > Driver circuits

IPC and CPC are identically structured here. All 12 subcodes exist in both systems.

IPC defines codes here since 2020.

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H05B 45/305 Frequency-control circuits since 2020 IPC+CPC Available in IPC and CPC
H05B 45/31 Phase-control circuits since 2020 IPC+CPC Available in IPC and CPC
H05B 45/32 Pulse-control circuits since 2020 IPC+CPC Available in IPC and CPC
H05B 45/34 Voltage stabilisation; Maintaining constant voltage since 2020 IPC+CPC Available in IPC and CPC
H05B 45/345 Current stabilisation; Maintaining constant current since 2020 IPC+CPC Available in IPC and CPC
H05B 45/347 Dynamic headroom control [DHC] since 2020 IPC+CPC Available in IPC and CPC
H05B 45/35 Balancing circuits since 2020 IPC+CPC Available in IPC and CPC
H05B 45/355 Power factor correction [PFC]; Reactive power compensation since 2020 IPC+CPC Available in IPC and CPC
H05B 45/357 specially adapted for retrofit LED light sources since 2020 IPC+CPC Available in IPC and CPC
H05B 45/36 Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI] since 2020 IPC+CPC Available in IPC and CPC
H05B 45/37 Converter circuits since 2020 IPC+CPC Available in IPC and CPC
H05B 45/395 Linear regulators since 2020 IPC+CPC Available in IPC and CPC

Class H05,2013–2023, worldwide · Source: EPO PATSTAT

Class H05,2013–2023, worldwide · Source: EPO PATSTAT