Unlike incandescent light sources, which can be powered directly from the mains supply, each LED lightbulb requires a power supply to be incorporated within the Edison (E27) or Bayonet (GU10) sockets.
To address the size constraints posed by this application, Power Integrations has released its LinkSwitch-TN family of non-isolated offline switcher ICs in tiny SO-8 packaging.
The RDK-131 incorporates this device in a tested, working power supply board and offers a blank PCB, extra samples of the LinkSwitch-TN ICs and guidelines on how to design LED lighting supplies around our ICs.
According to Don Ashley, product marketing manager at Power Integrations, “producing a power circuit that fits within such a small space is not a trivial task, especially if you effectively attenuate EMI to the current standards.
For more of the firm’s energy-efficient circuits see its website.