UC3843A

AKTIV

30-V-, 1-A-, 500-kHz-Strommodus-PWM-Controller mit 8,4V/7,6V UVLO, 100 % Tastverhältnis, 0 bis 70 Gr

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Datenblatt

document-pdfAcrobat UCx84xA Current-Mode PWM Controller datasheet (Rev. H) (Englisch) PDF | HTML

UC3843A

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Vin (max) (V)

28

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology

Duty cycle (max) (%)

100

Vin (max) (V)

28

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology

Duty cycle (max) (%)

100

PDIP (P)

8

92.5083 mm² 9.81 x 9.43

SOIC (D)

8

29.4 mm² 4.9 x 6

SOIC (D)

14

51.9 mm² 8.65 x 6

Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference
Up to 500kHz Operation
Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference
Up to 500kHz Operation
Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

filter

Andere AC/DC- und DC/DC-Controller (externer FET) suchen

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Technische Dokumentation

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Alle anzeigen 12

	Typ	Titel		Datum
*	Data sheet	UCx84xA Current-Mode PWM Controller datasheet (Rev. H)	PDF \| HTML	11 Okt 2024
	Application note	Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A)	PDF \| HTML	11 Jun 2021
	Application note	Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)		12 Mär 2019
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	Application note	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		07 Feb 2002
	Application note	DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit		05 Sep 1999
	Application note	DN-27 UC1842/UC1842A Family - Summary of Functional Differences		05 Sep 1999
	Application note	DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection		05 Sep 1999
	Application note	DN-30 Programmable Electronic Circuit Breaker		05 Sep 1999
	Application note	DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty		05 Sep 1999
	Application note	DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802		05 Sep 1999
	Application note	U-111, Practical Considerations in Current Mode Power Supplies		05 Sep 1999

Design und Entwicklung

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