L4984D

SSOP10 L4984D CCM PFC controller Datasheet - production data Table 1. Device summary Order code Package L4984D L4984DTR SSOP10 Packaging Tube Tape and reel Features Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators Proprietary LM-FOT modulator for nearly fixedfrequency operation Proprietary multiplier design for minimum THD of AC input current Fast “bi-directional” input voltage feedforward (1/V2 correction) Accurate adjustable output overvoltage protection Protection against feedback loop failure (latched shutdown) Inductor saturation protection AC brownout detection Digital leading-edge blanking on current sense Soft-start 1% (at Tj = 25 °C) internal reference voltage - 600 / + 800 mA totem pole gate driver with active pull-down during UVLO and voltage clamp SSOP10 package Applications PFC pre-regulators for: – IEC61000-3-2 and JEIDA-MITI compliant SMPS in excess of 1 KW – Desktop PC, server, web server April 2013 This is information on a product in full production. DocID024474 Rev 1 1/35 www.st.com 35 Contents Contents L4984D 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Typical electrical performance . . . . . . . ....