Datasheet

2.2 Setup
3 Board Layout
3.1 Layout
www.ti.com Board Layout
The following steps must be followed before the EVM can be operated.
1. Install the TPS65055EVM Software.
2. Connect input voltages and loads to the EVM.
3. Configure all EVM jumpers to factory setting.
Jumper Shunt Location
JP1 Between EN_DCDC1 and VIN
JP2 Between DEFLDO2 and HIGH
JP3 Between DEFLDO1 and HIGH
JP4 Between EN_DCDC2 and VIN
JP5 Between ENLDO1 and VINLDO1
JP6 Between ENLDO2 and VINLDO2
JP7 Between ENLDO3 and VINLDO3/4
JP8 Between ENLDO4 and VINLDO3/4
JP9 Between VINLDO1 and VIN
JP10 Between VINLDO2 and VIN
JP11 Between DEFDCDC2 and HIGH
JP12 Between VINLDO3/4 and VIN
4. Connect the ribbon cable between the EVM and the USB-TO-GPIO (HPA172) Adapter
5. Connect the USB cable between the computer and the HPA172 EVM.
6. Turn on all supplies.
7. Run the TPS65055EVM software.
This chapter provides the TPS65055EVM-258 board layout and illustrations.
Board layout is critical for all switch mode power supplies. The following shows the board layout for the
TPS65055EVM-258 PWB. The nodes with high switching frequencies and currents are short and are
isolated from the noise sensitive feedback circuitry. Careful attention has been given to the routing of high
frequency current loops. Refer to the datasheet for specific layout guidelines.
SLVU284 – January 2009 TPS65055EVM 5
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