Specification	UCC28250PWR

Clock Sync	False
Control Features	Soft Start, Current Limit, Ramp, Enable, Frequency Control
Frequency - Switching [Max]	1.15 MHz
Frequency - Switching [Min]	85 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Output Phases	1
Output Type	PWM Signal
Package / Case	20-TSSOP
Package / Case [x]	0.173 "
Package / Case [y]	4.4 mm
Supplier Device Package	20-TSSOP
Synchronous Rectifier	True
Topology	Half-Bridge, Full-Bridge, Push-Pull
Voltage - Supply (Vcc/Vdd) [Max]	17 V
Voltage - Supply (Vcc/Vdd) [Min]	4.7 V

UCC28250 Series

Part	Supplied Contents	Outputs and Type	Outputs and Type	Power - Output	Board Type	Utilized IC / Part	Voltage - Output	Contents	Frequency - Switching	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output	Main Purpose	Regulator Topology	Function	Output Phases	Mounting Type	Topology	Output Type	Supplier Device Package	Output Configuration	Frequency - Switching [Max]	Frequency - Switching [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Control Features
Texas Instruments UCC28250EVM-501	Board(s)	1 Isolated Output Isolated	1	75 W	Fully Populated	UCC28250	3.3 V	Board(s)	1 MHz	36 V	72 V	23 A	DC/DC Step Down	Buck
Texas Instruments UCC28250PW															Step-Up/Step-Down	1	Surface Mount	Full-Bridge Half-Bridge Push-Pull	PWM Signal	20-TSSOP	Positive	1.15 MHz	85 kHz	20-TSSOP	4.4 mm	0.173 "	2	-40 C	125 °C	17 V	4.7 V	Current Limit Enable Frequency Control Ramp Soft Start
Texas Instruments UCC28250EVM-564	Board(s)	1 Isolated Output Isolated	1	100 W	Fully Populated	UCC28250	3.3 V	Board(s)	200 kHz	36 V	75 V	30 A	DC/DC Step Down	Buck
Texas Instruments UCC28250RGPR															Step-Up/Step-Down	1	Surface Mount	Full-Bridge Half-Bridge Push-Pull	PWM Signal	20-QFN (4x4)	Positive	1.15 MHz	85 kHz	20-VFQFN Exposed Pad			2	-40 C	125 °C	17 V	4.7 V	Current Limit Enable Frequency Control Ramp Soft Start
Texas Instruments UCC28250PWR															Step-Up/Step-Down	1	Surface Mount	Full-Bridge Half-Bridge Push-Pull	PWM Signal	20-TSSOP	Positive	1.15 MHz	85 kHz	20-TSSOP	4.4 mm	0.173 "	2	-40 C	125 °C	17 V	4.7 V	Current Limit Enable Frequency Control Ramp Soft Start
Texas Instruments UCC28250RGPT															Step-Up/Step-Down	1	Surface Mount	Full-Bridge Half-Bridge Push-Pull	PWM Signal	20-QFN (4x4)	Positive	1.15 MHz	85 kHz	20-VFQFN Exposed Pad			2	-40 C	125 °C	17 V	4.7 V	Current Limit Enable Frequency Control Ramp Soft Start

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 4.20
		10	$ 3.77
		25	$ 3.57
		100	$ 3.09
		250	$ 2.93
		500	$ 2.63
		1000	$ 2.22
	Digi-Reel®	1	$ 4.20
		10	$ 3.77
		25	$ 3.57
		100	$ 3.09
		250	$ 2.93
		500	$ 2.63
		1000	$ 2.22
	N/A	0	$ 3.94
		5550	$ 3.94
	Tape & Reel (TR)	2000	$ 2.11
Texas Instruments	LARGE T&R	1	$ 3.17
		100	$ 2.78
		250	$ 1.95
		1000	$ 1.57

Description

General part information

UCC28250 Series

The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.

Documents

Technical documentation and resources

Using the UCC28250EVM-564 (Rev. A)

EVM User's guide

Power Management Guide 2018 (Rev. R)

Selection guide

Using the UCC28250EVM-501 Half Bridge DC-DC Converter with Primary Side Control (Rev. B)

EVM User's guide

UCC28250 Advanced PWM Controller With Prebias Operation datasheet (Rev. D)

Data sheet

Designing UCC28250 as a Secondary Side Control with a Pre-Bias Condition

Application note

Differences Between the UCC28251 and UCC28250 and Evaluation of the UCC28251 in (Rev. A)

Application note