I made PCB according to manufacturers recomanded design, and placed all components according to LT Spice CAD proposal to achieve best efficiency for desired parameters. This design doesn't give desired output, it is just routing input voltage to output (with some low dropout), i believe it is in some wire-mode. I need quick solution for this problem.
The SS pin can't be grounded, it needs to be connected to a soft-start cap as described in the data sheet.
I own you a dinner bro! GPerica
Somehow this pin slept away...If you can give me proposal for #6 pin MODE, should i choose SKIP, BURST or CONT CURR mode?
It will be used for supplying continuous current for LED, around 5A.
The MODE only affects the light load operation. The input current with no load will be highest in CONT mode.
In BURST mode the input current will be lowest but there will be more output voltage ripple. The SKIP mode will have a bit higher input current than BURST but it will have lower ripple voltage with no load.
I am experiencing the same issue with the LTC3787, when the RUN pin is brought to below 0.7V, the VIN is routed to VOUT. I do have a 0.1uF on the SS pin. I checked that INTVcc is turning off as well.... I do not understand why the TG pins of the top gates are showing the VOUT voltage through the boost pins....
You may try to connect VBIAS pin to VIN, not to VOUT. good luck