Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Leading edge blanking, Multi-topology, Soft start

Operating temperature range (°C)

-40 to 125

Duty cycle (max) (%)

100

TI functional safety category

Functional Safety-Capable

Rating

Catalog

Topology

Boost, Flyback, Forward

Vin (max) (V)

12

Control mode

Current

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Leading edge blanking, Multi-topology, Soft start

Operating temperature range (°C)

-40 to 125

Duty cycle (max) (%)

100

TI functional safety category

Functional Safety-Capable

SOIC (D)

8

29.4 mm² 4.9 x 6

TSSOP (PW)

8

19.2 mm² 3 x 6.4

100µA typical starting supply current
500µA typical operating supply current
Operation up to 1MHz
Internal soft start
Internal fault soft start
Internal leading-edge blanking of the current sense signal
1A totem-pole output
70ns typical response from current-sense to gate drive output
1.5% tolerance voltage reference
Same pinout as UC3842 and UC3842A

100µA typical starting supply current
500µA typical operating supply current
Operation up to 1MHz
Internal soft start
Internal fault soft start
Internal leading-edge blanking of the current sense signal
1A totem-pole output
70ns typical response from current-sense to gate drive output
1.5% tolerance voltage reference
Same pinout as UC3842 and UC3842A

The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC280x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC2803 and UCC2805 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies.

The UCC280x series is specified for operation from –40°C to 125°C.

The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC280x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC2803 and UCC2805 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies.

The UCC280x series is specified for operation from –40°C to 125°C.

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	類型	標題		日期
*	Data sheet	UCC280x Low-Power BiCMOS Current-Mode PWM Controllers datasheet (Rev. H)	PDF \| HTML	2025年 4月 25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
	Selection guide	Power Management Guide 2018 (Rev. R)		2018年 6月 25日
	Application note	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		2002年 2月 7日
	Application note	Differences Between the UCC3813 and the UCC3800 PWM Families		2000年 6月 2日
	Application note	DN-30 Programmable Electronic Circuit Breaker		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	DN-43 Simple Techniques to Generate a Negative Voltage Bias Supply		1999年 9月 5日
	Application note	DN-46 Highly Efficient Low Power DC to DC Inverter Converts +5V Input to -3V Out		1999年 9月 5日
	Application note	DN-48 Versatile Low Power SEPIC Converter Accepts Wide Input Voltage Range		1999年 9月 5日
	Application note	DN-54 Innovative Buck Regulator Uses High Side N-Channel Switch Without Complex		1999年 9月 5日
	Application note	DN-56A, Single Switch Flyback Circuit Converts + 5 V to +/- 12 V for RS-232/422		1999年 9月 5日
	Application note	DN-65 Considerations in Powering BiCMOS ICs		1999年 9月 5日
	Application note	U-111, Practical Considerations in Current Mode Power Supplies		1999年 9月 5日
	Application note	U-133A UCC3800/1/2/3/4/5 BiCMOS Current Mode Control IC's		1999年 9月 5日