Texas Instruments UCC2891 User Manual
Size:
307.97 Kb
Download

www.ti.com

EVM Assembly Drawing and Layout

8EVM Assembly Drawing and Layout

Figure 14 throughFigure 20 show thetop-sideandbottom-sidecomponent placement for the EVM, as well as device pin numbers where necessary. A four layer PCB was designed using the top and bottom layers for signal traces and component placement along with an internal ground plane. The PCB dimensions are 3.6" x 2.7" with a design goal of fitting all components within the industry standardhalf-brickformat, as outlined by the box dimensions 2.28" x 2.20" shown inFigure 15. All components are standard OTS surface mount components placed on the both sides of the PCB. Thecopper-etchfor each layer is also shown.

Figure 14. Top Side Component Assembly

SLUU178A –November2003–RevisedDecember 2006

Using the UCC2891 Active Clamp Current Mode PWM Controller

13

Submit Documentation Feedback

www.ti.com

EVM Assembly Drawing and Layout

Figure 15. Top Side Silk Screen

Figure 16. Top Signal Trace Layer

14

Using the UCC2891 Active Clamp Current Mode PWM Controller

SLUU178A –November2003–RevisedDecember 2006

Submit Documentation Feedback

www.ti.com

EVM Assembly Drawing and Layout

Figure 17. Internal Split Ground Plane

Figure 18. Internal Signal Trace Layer

SLUU178A –November2003–RevisedDecember 2006

Using the UCC2891 Active Clamp Current Mode PWM Controller

15

Submit Documentation Feedback

www.ti.com

EVM Assembly Drawing and Layout

Figure 19. Bottom Signal Trace Layer

Figure 20. Bottom Side Component Assembly

16

Using the UCC2891 Active Clamp Current Mode PWM Controller

SLUU178A –November2003–RevisedDecember 2006

Submit Documentation Feedback