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AN1842 APPLICATION NOTE

Board lay-out

Figure 26. Board silk-screen and bottom plane (not in scale)

µm

Conclusions

An SMPS for LCD monitors or LCD-TV sets has been completely designed, assembled and tested using

the L5991. All the different aspects (Component Electrical Stress, Functions, Protections, Conducted

EMI, Thermal Stress) have been checked, giving positive results. The design meets also low-cost and low-

complexity requirements, key factors in the Consumer Electronic market.