Texas Instruments TPS650250EVM-447 Evaluation Module TPS650250EVM-447 TPS650250EVM-447 Datenbogen
Produktcode
TPS650250EVM-447
5
Connector and Test Point Descriptions
5.1
J1 –VIN
5.2
J2 – GND
5.3
J3 – VINLDO/GND
5.4
J4 – VDCDC1
5.5
J5 – GND
5.6
J6 – VDCDC2
5.7
J7 – GND
5.8
J8 – VDCDC3
Connector and Test Point Descriptions
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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 should be twisted and kept as short as possible.
The input voltage has to be between 3.3-V and 6-V.
between J1 and J2 (GND). The leads to the input supply should be twisted and kept as short as possible.
The input voltage has to be between 3.3-V and 6-V.
This header is the return connection to the input power supply. Connect the power supply between J12
and J1 (VIN). The leads to the input supply should be twisted and kept as short as possible. The input
voltage has to be between 3.3-V and 6-V.
and J1 (VIN). The leads to the input supply should be twisted and kept as short as possible. The input
voltage has to be between 3.3-V and 6-V.
This header is the input supply for the LDOs LDO1, LDO2 and VDD_ALIVE. On the EVM VINLDO is
directly connected to VIN with R2. It can be also connected to VDCDC1 with R1.
directly connected to VIN with R2. It can be also connected to VDCDC1 with R1.
An external power supply can be connected between J3 pin1 (VINLDO) and pin2 (GND). Note that the
resistors R1 and R2 should be removed when supplying the LDOs from an external power supply.
resistors R1 and R2 should be removed when supplying the LDOs from an external power supply.
This header is the positive output of VDCDC1 step-down converter. The output voltage of DCDC1 can be
selected between two default output voltage (3.3-V/2.7-V) with JP8 DEF1. In addition the output voltage of
DCDC1 can be adjusted to any voltage between 0.6-V and VINDCDC1 with the external voltage divider
R12 and R13.
selected between two default output voltage (3.3-V/2.7-V) with JP8 DEF1. In addition the output voltage of
DCDC1 can be adjusted to any voltage between 0.6-V and VINDCDC1 with the external voltage divider
R12 and R13.
Note that the shorting jumper JP8 should be removed when using the external voltage divider.
The default setting is 3.3-V. VDCDC1 is capable of sourcing up to 1600-mA. A load can be connected
between J4 and J5 (GND)
between J4 and J5 (GND)
J5 is the return connection of VDCDC1 output rail. A load can be connected between J5 and J4
(VDCDC1).
(VDCDC1).
This header is the positive output of VDCDC2 step-down converter. The output voltage of DCDC2 can be
selected between two default output voltage (2.5-V/1.8-V) with JP9 DEF2. In addition the output voltage of
DCDC1 can be adjusted to any voltage between 0.6-V and VINDCDC2 with the external voltage divider
R14 and R15.
selected between two default output voltage (2.5-V/1.8-V) with JP9 DEF2. In addition the output voltage of
DCDC1 can be adjusted to any voltage between 0.6-V and VINDCDC2 with the external voltage divider
R14 and R15.
Note that the shorting jumper JP9 should be removed when using the external voltage divider.
The default setting is 1.8-V. VDCDC2 is capable of sourcing up to 800-mA. A load can be connected
between J6 and J7 (GND).
between J6 and J7 (GND).
J7 is the return connection of VDCDC2 output rail. A load can be connected between J7 and J6
(VDCDC2).
(VDCDC2).
This header is the positive output of VDCDC3 step-down converter. This output is externally adjustable for
the TPS650250. The default setting is 1.2-V. VDCDC3 is capable of sourcing up to 800-mA. A load can be
connected between J8 and J9 (GND).
the TPS650250. The default setting is 1.2-V. VDCDC3 is capable of sourcing up to 800-mA. A load can be
connected between J8 and J9 (GND).
6
Using the TPS650250EVM Power Management IC for Li-Ion Powered Systems
SLVU290 – July 2009