L4984D AC-DC Converters by STMicroelectronics

CCM PFC CONTROLLER


The L4984D is a current-mode PFC controller operating with line-modulated fixed-off-time (LM-FOT) control. A proprietary LM-FOT modulator allows fixed-frequency operation for boost PFC converters as long as they are operated in CCM (continuous conduction mode). The chip comes in a 10-pin SO package and offers a low-cost solution for CCM-operated boost PFC pre-regulators in EN61000-3-2 and JEIDA-MITI compliant applications, in a power range that spans from few hundred W to 1 KW and above. The highly linear multiplier includes a special circuit, able to reduce the crossover distortion of the AC input current, that allows wide-range-mains operation with a reasonably low THD, even over a large load range. The output voltage is controlled by means of a voltage-mode error amplifier and an accurate (1% at Tj = 25 °C) internal voltage reference. Loop stability is optimized by the voltage feedforward function (1/V 2 correction), which in this IC uses a proprietary technique that also significantly improves line transient response in the case of mains drops and surges (“bi-directional”). The device features low consumption and includes a disable function suitable for IC remote on/off. These features allow use in applications which also comply with the latest energy saving requirements (Blue Angel, ENERGY STAR  , Energy 2000, etc.). In addition to overvoltage protection able to keep the output voltage under control during transient conditions, the IC is also provided with protection against feedback loop failures or erroneous settings. Other onboard protection functions allow that brownout conditions and boost inductor saturation can be safely handled. Soft-start limits peak current and extends off-time to prevent flux runaway in the initial cycles. The totem pole output stage, capable of 600 mA source and 800 mA sink current, is suitable for big MOSFETs or IGBT drive.

Where to Buy

Prices starting from US$0.52

Distributor Stock
Logo for Farnell
Farnell
from US$1.20
No stock
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Logo for Chip One Stop
Chip One Stop
from US$1.04
2,000
in stock
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Logo for Transfer Multisort Elektronik
Transfer Multisort Elektronik
from US$1.86
100
in stock
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Logo for Newark Electronics
Newark Electronics
from US$0.52
90
in stock
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Logo for Avnet Silica
Avnet Silica
-
1,900
in stock
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Logo for Future Electronics
Future Electronics
from US$1.22
-
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Logo for Avnet America
Avnet America
from US$1.18
-
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Logo for element14
element14
from US$1.29
-
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Logo for EBV Elektronik
EBV Elektronik
-
-
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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/V2correction)
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

Alternative Descriptions

IC: driver | Transfer Multisort Elektronik
Pfc Controller, Ccm, 22.5V, Ssop-10 | Newark Electronics
Power Factor Correction CONTRLR 0.065mA 10-Pin SSOP Tube | Avnet Silica
Current-Mode 22.5 V 6 mA Line-Modulated Fixed-Off-Time PFC Controller-SSOP-10 | Future Electronics
PFC CONTROLLER, CCM, 22.5V, SSOP-10 | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a L4984D?

Additional datasheets, footprints and schematics for L4984D are listed on our Part Details page. You can also find images and similar parts to L4984D on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for L4984D on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L4984D price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L4984D fall under?

The L4984D is listed under Power Management > AC-DC Converters > PFC Controllers.

Can I view similar or alternative parts?

You can view similar parts to L4984D when available in the PFC Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the L4984D you can contact the distributor directly for product support, shipping queries etc.

Is the L4984D RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for L4984D have stock available?

Authorised distributors including Chip One Stop, Transfer Multisort Elektronik, Newark Electronics, Avnet Silica and Future Electronics have stock available or on a lead time for L4984D.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for L4984D often in real-time on the comparison pages.

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