SSOP10
L4984D
CCM PFC controller
Datasheet - production data
Table 1. Device summary
Order code
Package
L4984D L4...
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.
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Contents
Contents
L4984D
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Typical electrical performance . . . . . . . ....