Datasheet

www.ti.com

Board Layout

The options given by the EVM (changing resistors gives more) are listed in Table 2, indicating the range of

the service-frequency.

Table 2. Watchdog Setting

SERVICE SERVICE

SETTING ROSC FREQUENCY FREQUENCY

(kHz) (kΩ) MIN MAX

(Hz) (Hz)

25.0 200 6 9

250.0 20 60 90

500.0 10 120 180

Open Jumper open 7 12

WD_FLT is the output of the watchdog. If properly triggered, it stays high. If not or improperly triggered, it

will provide a low-pulse. The duration of the pulse equals 1/fOSC and can be used to verify the internal

clock frequency. If the jumpers are changed on ROSC, a power-cycle is required, since their value is only

recognized during power-up.

2.2 Setup

The input voltage range for the converter is (V

OUT

+ 0.3V) volts to 40 volts. The EVM can support up to

300mA of load current.

2.3 Operation

The TPS7A63xxQPWP will power-up after the V

BAT

voltage has exceeded the Power-On Reset threshold.

In this configuration, the device will power up when power is applied.

3 Board Layout

Figure 6, Figure 7, and Figure 8 show the board layout for the TPS7A63xxQPWP EVM PCB.

The PowerPAD™ package offers an exposed thermal pad to enhance thermal performance. This must be

soldered to the copper landing on the PCB for optimal performance. The PCB provides 2 oz copper

planes on the top and bottom to dissipate heat.

SLVU477–June 2011 TPS7A63xxEVM Evaluation Module

Submit Documentation Feedback