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Siehe Technische Spezifikationen

L4985A +BOM

Continuous conduction mode (CCM) PFC controller with high voltage startup

Hersteller:

STMicroelectronics, Inc
Herstellerteil #:

L4985A
Datenblatt:

L4985A Datenblatt (PDF)
Mode:

Continuous Conduction (CCM)
Frequency - Switching:

65kHz
Current - Startup:

400 µA
Voltage - Supply:

10V ~ 24.5V

L4985A Allgemeine Beschreibung

The L4985 is a peak current-mode PFC controller for boost converter with a proprietary multiplier “emulator” which in addition to the innovative THD optimizers guarantee very low Total Harmonic Distortion (THD) performance in all operating conditions. The device comes in a pin SO package and offers a high performance/low-component count 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 some kW.The device, thanks to a proprietary off-time modulator, operates in quasi-fixed frequency in all operating conditions. Two options are available, 65 kHz for A and 130 kHz for B.The 800V high voltage start-up block includes also the circuitry to discharge the X-capacitors of the EMI filter to a safe level. This allows the unit to meet safety regulation (such as IEC 61010-1 or IEC 62368-1) without using the traditional discharge resistor in parallel to the X-capacitors.The device features low consumption and disable functions allowing usage in applications supposed to comply even with the latest energy saving requirements issued by Energy Star, the Department of Energy (DoE) in the United States, the European Code of Conduct, the European Union’s Ecodesign Directive, and other guidelines.In addition to an overvoltage protection able to keep the output voltage under control during transient conditions, the IC is provided also with a protection against feedback loop failures or erroneous settings and boost inductor saturation. The brownout protection function allows to design medical equipment according to the latest regulations driven by IEC 60601-1-2 which requires the output regulation in case of mains dips lasting up to 500 msec. Soft-start limits the peak current.The totem-pole output stage, capable of 0.7 A source and 1.5 A sink current, is suitable for big MOSFET or IGBT drives.

Hauptmerkmale

Peak current mode CCM-operated
800 V high voltage startup with integrated input voltage sensing
Active input filter capacitor discharge
Proprietary multiplier “emulator” with minimum THD of line current in all operating conditions (CCM and DCM)
Extremely few external components
Protections: feedback loop failure, OVP, OCP, inductor saturation, brown-in, brownout (compliant to medical SMPS standards)
Inductor current sense
Disable and low consumption function
In-rush current monitoring
Soft-start for smooth startup
1.2% (@ Tj = 25 °C) internal reference voltage
65 kHz (A version) and 130 kHz (B version) switching frequency
SO8 package

Spezifikationen

Category	Integrated Circuits (ICs)Power Management (PMIC)PFC (Power Factor Correction)	Series	-
Mode	Continuous Conduction (CCM)	Frequency - Switching	65kHz
Current - Startup	400 µA	Voltage - Supply	10V ~ 24.5V
Operating Temperature	-40°C ~ 150°C (TJ)	Mounting Type	Surface Mount
Base Product Number	L4985	feature-type	Power Factor Correction Controller
feature-maximum-power-dissipation-mw		feature-packaging	Tube
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified		feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc
feature-svhc-exceeds-threshold	No

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Bewertungen und Rezensionen

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J**n 03.09.2024

The goods received. The quality of the goods, packaging and the delivery time is completely satisfied with me.I have received the item. The quality of goods, packing and delivery period completely suit me.

D**? 10.15.2022

Rapid response, the price is competitive, quality is reliable, a good company!The five-star recommendation!

M**a 07.17.2021

Passed the protection period, the give 5 star, then came and transistors.