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Connector and Test Point Descriptions
4
Connector and Test Point Descriptions
4.1
Enable Jumpers/Switches
4.1.1
J1 – VIN
This header is the positive connection to the input power supply. The power supply must be connected
between J1 and J2 (GND). The leads to the input supply must be twisted and kept as short as possible.
The input voltage has to be between 4.35 V and 6 V.
4.1.2
J2 – GND
This header is the return connection to the input power supply. Connect the power supply between J2 and
J1 (VIN). The leads to the input supply must be twisted and kept as short as possible. The input voltage
has to be between 4.35 V and 6 V.
4.1.3
J3 – BAT / GND / TS
Connect your battery positive connection to pin 1 of J3, negative connection to pin 2 of J3. The battery
thermistor can be connected to pin 3 of J3. if an external thermistor is used, R2 must be removed.
4.1.4
J4 – SYS
This header is the positive output of the power path.
4.1.5
J5 – GND
This header is the negative output of the power path.
4.1.6
J6 – VIN_LDO1 / GND
This header is the input supply for the LDO1 on the EVM. VINLDO1 is directly connected to SYS with R4.
It also can be connected to VDCDC1 with R5. An external power supply can be connected between J6
pin1 (VINLDO) and pin2 (GND). Note that the resistors R4 and R5 must be removed when supplying the
LDO1 from an external power supply.
4.1.7
J7 – VDCDC1
This header is the positive output of VDCDC1 step-down converter. The output voltage of DCDC1 can be
adjusted to any voltage between 0.6 V and VINDCDC1 with the external voltage divider R7 and R8.
The default setting is 1.2 V. VDCDC1 is capable of sourcing up to 200 mA. A load can be connected
between J7 and J8 (GND).
4.1.8
J8 – GND
J8 is the return connection of VDCDC1 output rail. A load can be connected between J8 and J7
(VDCDC1).
4.1.9
J9 – VLDO
This header is the positive output of LDO1 linear regulator. The default output voltage of LDO1 is 1.85 V.
VLDO1 can be adjusted via I2C interface in the range between .
LDO1 is capable of sourcing up to 300 mA. A load can be connected between J9 and J10 (GND).
4.1.10
J10 – GND
J10 is the return connection of LDO1 output rail. A load can be connected between J10 and J9
(VDCDC1).
5
SLVU324 – March 2010
TPS65720EVM
Copyright © 2010, Texas Instruments Incorporated
