UCC2897APWR

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Texas Instruments

110-V ACTIVE CLAMP CURRENT MODE PWM CONTROLLER WITH P-CHANNEL CLAMP FET AND LINE OV PROTECTION

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DocumentsPower Management Guide Method of Providing Hiccup Operation for UCC2897AEVM +9

UCC2897APWR

Active

Texas Instruments

110-V ACTIVE CLAMP CURRENT MODE PWM CONTROLLER WITH P-CHANNEL CLAMP FET AND LINE OV PROTECTION

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DocumentsPower Management Guide Method of Providing Hiccup Operation for UCC2897AEVM +9

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Technical Specifications

Parameters and characteristics for this part

Specification	UCC2897APWR

Clock Sync	True
Control Features	Current Limit, Soft Start, Enable
Duty Cycle (Max) [Max]	70 %
Frequency - Switching	250 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	20-TSSOP
Package / Case [x]	0.173 in
Package / Case [y]	4.4 mm
Supplier Device Package	20-TSSOP
Synchronous Rectifier	True
Topology	Forward Converter, Flyback
Voltage - Supply (Vcc/Vdd) [Max]	16 V
Voltage - Supply (Vcc/Vdd) [Min]	8.5 V

UCC2897A Series

110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

Part	Function	Supplier Device Package	Number of Outputs	Mounting Type	Output Configuration	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Package / Case [y]	Package / Case	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching	Control Features	Output Phases	Topology	Duty Cycle (Max) [Max]	Output Type	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output	Utilized IC / Part	Board Type	Outputs and Type	Outputs and Type	Main Purpose	Supplied Contents	Regulator Topology	Voltage - Output
Texas Instruments UCC2897PWR	Step-Up/Step-Down	20-TSSOP	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V	4.4 mm	20-TSSOP	0.173 in	105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897ARGPT	Step-Up/Step-Down	20-QFN (4x4)	1	Surface Mount	Isolation Capable Positive	8.5 V	16 V		20-VFQFN Exposed Pad		125 ¯C	-40 °C	250 kHz	Current Limit Enable Soft Start	1	Flyback Forward Converter	70 %	Transistor Driver
Texas Instruments UCC2897PWRG4	Step-Up/Step-Down	20-TSSOP	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V	4.4 mm	20-TSSOP	0.173 in	105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897PWG4	Step-Up/Step-Down	20-TSSOP	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V	4.4 mm	20-TSSOP	0.173 in	105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897RTJR	Step-Up/Step-Down	20-QFN (4x4)	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V		20-WFQFN Exposed Pad		105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897ARGPR	Step-Up/Step-Down	20-QFN (4x4)	1	Surface Mount	Isolation Capable Positive	8.5 V	16 V		20-VFQFN Exposed Pad		125 ¯C	-40 °C	250 kHz	Current Limit Enable Soft Start	1	Flyback Forward Converter	70 %	Transistor Driver
Texas Instruments UCC2897RTJT	Step-Up/Step-Down	20-QFN (4x4)	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V		20-WFQFN Exposed Pad		105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897PW	Step-Up/Step-Down	20-TSSOP	1	Surface Mount	Isolation Capable Positive	8.5 V	14.5 V	4.4 mm	20-TSSOP	0.173 in	105 °C	-40 °C	250 kHz	Enable On Time Control Soft Start	1	Flyback Forward Converter	74 %	Transistor Driver
Texas Instruments UCC2897APWR	Step-Up/Step-Down	20-TSSOP	1	Surface Mount	Isolation Capable Positive	8.5 V	16 V	4.4 mm	20-TSSOP	0.173 in	125 ¯C	-40 °C	250 kHz	Current Limit Enable Soft Start	1	Flyback Forward Converter	70 %	Transistor Driver
Texas Instruments UCC2897AEVM													250 kHz						36 V	72 V	30 A	UCC2897A	Fully Populated	Isolated	1	DC/DC Step Down	Board(s)	Forward Converter	3.3 V

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	$ 3.72
		10	$ 2.44
		25	$ 2.11
		100	$ 1.73
		250	$ 1.55
		500	$ 1.44
		1000	$ 1.35
	Digi-Reel®	1	$ 3.72
		10	$ 2.44
		25	$ 2.11
		100	$ 1.73
		250	$ 1.55
		500	$ 1.44
		1000	$ 1.35
	Tape & Reel (TR)	2000	$ 1.27
		4000	$ 1.21
		6000	$ 1.17
Texas Instruments	LARGE T&R	1	$ 2.07
		100	$ 1.71
		250	$ 1.23
		1000	$ 0.93

Description

General part information

UCC2897A Series

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAXlimit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.