UC2843A

現行

具有 8.4V/7.6V UVLO 100% 占空比、40°C 至 85°C 的 30-V、1-A、500KHz 電流模式 PWM 控制器

立即訂購

產品規格表

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

UC2843A

現行

產品規格表

立即訂購

產品詳細資料

Vin (max) (V)

28

Operating temperature range (°C)

-40 to 85

Control mode

Peak current mode

Topology

Boost, Buck, Buck boost, 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)

-40 to 85

Control mode

Peak current mode

Topology

Boost, Buck, Buck boost, 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.

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TL2843

現行

具有 8.4V/7.6V UVLO 100% 工作週期、-40-85C 的經濟型單端 500KHz 電流模式 PWM 控制器 Cost-optimized

引腳對引腳且具備與所比較裝置相同的功能

UCC28C53

現行

工業用 30-V、低功耗電流模式 PWM 控制器、8.4-V/7.6-V UVLO、100% 工作週期 Lower startup and supply current, better reference voltage accuracy and faster overcurrent protection

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檢視所有 11

	類型	標題		日期
*	Data sheet	UCx84xA Current-Mode PWM Controller datasheet (Rev. H)	PDF \| HTML	2024年 10月 11日
	Application note	Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A)	PDF \| HTML	2021年 6月 11日
	Application note	Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)		2019年 3月 12日
	Application note	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		2002年 2月 7日
	Application note	DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit		1999年 9月 5日
	Application note	DN-27 UC1842/UC1842A Family - Summary of Functional Differences		1999年 9月 5日
	Application note	DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection		1999年 9月 5日
	Application note	DN-30 Programmable Electronic Circuit Breaker		1999年 9月 5日
	Application note	DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty		1999年 9月 5日
	Application note	DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802		1999年 9月 5日
	Application note	U-111, Practical Considerations in Current Mode Power Supplies		1999年 9月 5日