Update: 30 September, 2023
AN3256 is a ST application note that introduces a prototype of a non-dimmable, non-isolated LED driver. The physical design is small enough to fit in the base of an A19 lamp (screw bases 40 to 60 W equivalent). The coupled inductor has a stepdown winding to power the L6562A PFC driver. The design goals: Input: 96-132VAC, 60 Hz, non-dimmable, TRIAC dimmer safe (no damage); Output: 370 mA into strings of 5 to 12 LEDs; Topology: stepdown (buck) switching regulator; Features: regulation of LED current, power factor acceptable for US market for residential use, excellent efficiency. ST devices: PFC controller: L6562A; Switching FET: STD5NM50; Flywheel diode: STTH1R04.
File format: PDF
Size: -
MD5 Checksum: 88E53F01F6CB7C573E6164C98D1A7B43
Publication date: 06 August, 2012
Downloads: -
PDF Link: ST AN3256 Application note Low-cost LED driver for an A19 lamp handbook PDF