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STMicroelectronics Electronic Components Datasheet

L4984DTR Datasheet

CCM PFC controller

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L4984DTR pdf
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 fixed-
frequency 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


STMicroelectronics Electronic Components Datasheet

L4984DTR Datasheet

CCM PFC controller

No Preview Available !

L4984DTR pdf
Contents
Contents
L4984D
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Typical electrical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Theory of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Feedback failure detection (FFD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Voltage feedforward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9 Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10 Inductor saturation detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11 THD optimizer circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
12 Power management and housekeeping functions . . . . . . . . . . . . . . . . 30
13 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
14 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2/35 DocID024474 Rev 1


Part Number L4984DTR
Description CCM PFC controller
Maker STMicroelectronics
Total Page 30 Pages
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