UCC2897A Series

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

Catalog

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

Catalog

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

Key Features

• Low-output jitterSoft-stop shutdown of MAIN and AUX110-V input startup functionIdeal for active-clamp, reset-forward, flyback and synchronous rectifier usesProvides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switchesPeak current-mode control with 0.5-V cycle-by-cycle current limitingTrueDrive™ 2-A Sink, 2-A source outputsTrimmed internal-bandgap reference for accurate line UV and line OV thresholdProgrammable slope compensationHigh-performance 1-MHz synchronizable oscillator with internal timing capacitorPrecise programmable maximum duty cyclePB-free lead finish packageLow-output jitterSoft-stop shutdown of MAIN and AUX110-V input startup functionIdeal for active-clamp, reset-forward, flyback and synchronous rectifier usesProvides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switchesPeak current-mode control with 0.5-V cycle-by-cycle current limitingTrueDrive™ 2-A Sink, 2-A source outputsTrimmed internal-bandgap reference for accurate line UV and line OV thresholdProgrammable slope compensationHigh-performance 1-MHz synchronizable oscillator with internal timing capacitorPrecise programmable maximum duty cyclePB-free lead finish package

Description

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. The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages. 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. The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.