Texas Instruments TPS65137A-366 Evaluation Board TPS65137AEVM-366 TPS65137AEVM-366 TPS65137AEVM-366 Datenbogen
Produktcode
TPS65137AEVM-366
SLVS929A – MAY 2010 – REVISED OCTOBER 2012
APPLICATION INFORMATION
PCB LAYOUT
The layout for his device is important to keep the output voltage ripple and output voltage accuracy as low and
accurate as possible. The following layout guidelines apply for this device:
•
accurate as possible. The following layout guidelines apply for this device:
•
Keep the switch note pad for the boost converter and inverter switch as small as possible to avoid coupling
into the output.
into the output.
•
The ground connection for the inductor of the negative converter needs to be as wide as possible to avoid
noise generated by inductor ground currents.
noise generated by inductor ground currents.
•
The ground connection of the timing capacitor on pin CT needs to be isolated and directly routed to the GND
pin of the device. This is important to avoid noise being coupled into the error amplifier which is internally
connected to the CT pin.
pin of the device. This is important to avoid noise being coupled into the error amplifier which is internally
connected to the CT pin.
•
Having the ground connection of the boost converter output capacitor and LDO output capacitor in a close
connection to the device ground and power pad connection achieves best load regulation.
connection to the device ground and power pad connection achieves best load regulation.
14
Copyright © 2010–2012, Texas Instruments Incorporated
Product Folder Links: