Texas Instruments 2.5A, 10.8 to 13.2 Vin, SWIFT™ Converter Evaluation Module TPS54260EVM-597 TPS54260EVM-597 데이터 시트
제품 코드
TPS54260EVM-597
Vout = 2 V / div
PH = 10 V / div
Inductor Current = 500 mA / div
Time = 2 usec / div
Board Layout
www.ti.com
2.12
Eco-mode™ Operation
At light load currents, the TPS54260 is designed to operate in the pulse-skipping Eco-mode™ operation.
When the COMP pin voltage lowers to 500 mA typical, the device enters the Eco-mode™ operation.
When the COMP pin voltage lowers to 500 mA typical, the device enters the Eco-mode™ operation.
The output voltage, PH node voltage and inductor current for Eco-mode™ is shown in
.
Figure 12. TPS54260EVM–415 Eco–mode™ Operation
3
Board Layout
This section provides a description of the TPS54260EVM-597, board layout, and layer illustrations.
3.1
Layout
The board layout for the TPS54260EVM-597 is shown in
through
. The top-side layer
of the EVM is laid out in a manner typical of a user application. The top and bottom layers are 2-oz
copper.
copper.
The top layer contains the main power traces for V
IN
, V
OUT
, and VPHASE. Also on the top layer are
connections for the remaining pins of the TPS54260 and a large area filled with ground. The bottom layer
contains ground and a signal route for the BOOT capacitor. The top and bottom and internal ground traces
are connected with multiple vias placed around the board including six vias directly under the TPS54260
device to provide a thermal path from the top-side ground area to the bottom-side ground plane.
contains ground and a signal route for the BOOT capacitor. The top and bottom and internal ground traces
are connected with multiple vias placed around the board including six vias directly under the TPS54260
device to provide a thermal path from the top-side ground area to the bottom-side ground plane.
The input decoupling capacitors (C2 and C3) and bootstrap capacitor (C5) are all located as close to the
IC as possible. In addition, the voltage set-point resistor divider components are also kept close to the IC.
The voltage divider network ties to the output voltage at the point of regulation, the copper V
IC as possible. In addition, the voltage set-point resistor divider components are also kept close to the IC.
The voltage divider network ties to the output voltage at the point of regulation, the copper V
OUT
trace past
the output capacitors (C8 and C9). For the TPS54260, an additional input bulk capacitor may be required
(C1), depending on the EVM connection to the input supply.
(C1), depending on the EVM connection to the input supply.
10
TPS54260EVM-597 2.5-A, SWIFT™ Regulator Evaluation Module
SLVU372 – March 2009
Copyright © 2009, Texas Instruments Incorporated