UCC2897A - 高级电流模式有源钳位 PWM 控制器

UCC2897A是TI德州仪器公司的一款PWM与谐振控制器产品，UCC2897A是高级电流模式有源钳位 PWM 控制器，本站介绍了UCC2897A的封装应用图解、特点和优点、功能等，并给出了与UCC2897A相关的TI元器件型号供参考。

UCC2897A - 高级电流模式有源钳位 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品特性

Low-Output Jitter
Soft-Stop Shutdown of MAIN and AUX
110-V Input Startup Function
Ideal for Active-Clamp, Reset-Forward, Flyback and Synchronous Rectifier Uses
Provides Complementary Auxiliary Driver with Programmable Dead Time (Turn-On Delay) between AUX and MAIN Switches
Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting
TrueDrive™ 2-A Sink, 2-A Source Outputs
Trimmed Internal-Bandgap Reference for Accurate Line UV and Line OV Threshold
Programmable Slope Compensation
High-Performance 1-MHz Synchronizable Oscillator with Internal Timing Capacitor
Precise Programmable Maximum Duty Cycle
PB-Free Lead Finish Package

产品应用

High-Efficiency DC-to-DC Power Supplies
Server Power, 48-V Telecom, Datacom, and 42-V Automotive Applications

产品说明

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 DMAX limit, 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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
UCC2897A	TSSOP (20)	6.60 mm x 6.60 mm
UCC2897A	VQFN (20)	4.15 mm x 4.15 mm

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