AN2600

Conclusions

29/30

4

Conclusions

A 55 W SMPS for terrestrial and satellite DVB based on 7100 chipset has been designed

and fully validated, resulting in an efficient, reliable, and cost-effective system.

The power supply is based on the L6668 controller with integrated high voltage startup

circuit, which provides high efficiency also in standby and light load conditions, thanks to its

dedicated functions related to "STBY" and "SKIPADJ" pins.

5

Revision history

Table 20.

Thermal behavior of the components at secondary side

D55 case (°C) D54 case (°C)

U5 case (°C)

U5

heatsink (°C)

C102 (°C)

After 30 min

586979

64

61

After 1 hour

63

71

81

68

65

Table 21.

Document revision history

Date

Revision

Changes

17-Jan-2008

1

Initial release