The UCC2897 PWM controller simplifies implementation of the various active clamp/reset and synchronous rectifier switching power topologies.
Based on the UCC2891 active-clamp controller the UCC2897 is a peak current-mode, fixed-frequency, high-performance pulse width modulator. It 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 converter's ON and OFF transitions with regard to the bulk input voltage.
The UCC2897 adds a second level hiccup mode current sense threshold, bi-directional synchronization and the input overvoltage protection functionalities that are not available on the 16-pin UCC2891. The UCC2897 is offered in 20-pin TSSOP (PW) and 20-pin QFN (RTJ) package.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | Advanced Current-Mode Active Clamp PWM Controller datasheet (Rev. G) | 17 Dez 2008 | |
| More literature | Исходные проекты ll | 13 Mai 2011 | ||
| User guide | Reference Design PR265A (Rev. A) | 01 Apr 2004 | ||
| Application note | UCC2891 Active Clamp | 22 Dez 2003 | ||
| More literature | Seminar 1000 Topic 3 - Active Clamp and Reset Technique | 15 Feb 2001 | ||
| More literature | Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset | 15 Feb 2001 |
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| Gehäuse | Pins | Herunterladen |
|---|---|---|
| TSSOP (PW) | 20 | Optionen anzeigen |
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