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Can LITIX devices provide a constant 1.5A LED current in B2G topology?

Can LITIX devices provide a constant 1.5A LED current in B2G topology?

Infineon_Team
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Employee
50 replies posted 25 likes received 25 replies posted

In theory there are no limitations for the topology.

In the real case, having about 90% of efficiency and 50W output power, the power losses are 5.5W. The diode suffers of quite high power losses (about 2W).

This means the board cannot be compacted and the heatsink could be needed.

The other option is to use the TLD5190QV/QU or TLD5191ES. In this case the device works in boost mode (only 2 MOSFET switching) and the power losses are minimized by using a synchronous MOSFET.

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