15W LED downlight driver uses active damping for flicker-free dimming
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Linkswitch-PH downlight driver
Power Integrations 15W PAR38 LED downlight driver for high-voltage integrated circuits, the Linkswitch-PH, allows flicker-free dimming and is 85 per cent efficient.
The downlight driver uses active damping with bleeding circuitry, which, according to the company, is more efficient and ensures longer life than using an electrolytic bulk capacitor.
The Linkswitch-PH also meets all PFC and harmonic content rules.
Finally, it is compatible with existing home dimmers.
Power Integrations has launched its Linkswitch-3 series of integrated monolithic switching ICs. The devices are claimed to deliver accurate primary-side regulation for chargers and adapters up to 10W, making them suitable for smartphones, tablets and other mobile devices, particularly those subject to 30mW no-load limitations, such as upcoming mandatory US DoE EPS efficiency regulations and EU CoC Tier 2 guidelines.
This document from Power Integrations is an engineering report describing a non-isolated LED driver (power supply) utilising a LNK458KG from the Linkswitch-PL series of devices.
The Linkswitch-PH has been developed to cost-effectively design a single-stage power-factor-corrected LED driver with primary-side constant-current control.
This design idea presents the schematic for a CV/CC power supply for LED driver applications using the Linkswitch-II LNK605DG.
The power supply shown in this design idea uses a Linkswitch-TN device in a boost converter configuration to deliver a constant current of 20mA from a single positive voltage of 554VDC.