Datasheet

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2 Setup
3 Operation
Setup
Table 1 describes the jumpers and connectors on the EVM, as well as how to properly connect, set up,
and use the TPS780xxxEVM-301.
Table 1. TPS780xxEVM-301 Jumpers and Connections
Connection
Jumper Connection Instructions
Description
J1 U1 Input V (IN) Connect the lead from the power terminal of the input source for the U1 circuit to this input
J2 U1 Input Ground (GND) Connect the lead from the return terminal of the input source for the U1 circuit to this input
J3 U1 Output (OUT) Connect the positive side of the load and/or output multimeter to this output
J4 U1 Output Ground Connect the ground side of the load and/or output multimeter to this output.
J5 U2 Input V (IN) Connect the lead from the power terminal of the input source for the U2 circuit to this input.
J6 U2 Input Ground Connect the lead from the return terminal of the input source for the U2 circuit to this input.
J7 U2 Output Connect the positive side of the load and/or output multimeter to this output.
J8 U2 Output Ground Connect the ground side of the load and/or output multimeter to this output.
Enable input for the U1 device. Place a shunt across the H and EN pins of JP1 to enable U1.
JP1 U1 EN Place a shunt across the L and EN pins of JP1 to disable U1. A shunt must be installed on
JP1 in either H or L positions and EN must not be left unconnected.
User can program the output voltage. Place a shunt across the H and V
SET
pins of JP2 to set
JP2 U1 V
SET
/FB the output of U1 to the default value of 2.2 V. Place a shunt across the L and V
SET
pins of
JP2 to the output of U1 to the default value of 3.3 V.
Enable input for the U2 device. Place a shunt across the H and EN pins of JP3 to enable U2.
JP3 U2 EN Place a shunt across the L and EN pins of JP3 to disable U2. A shunt must be installed on
JP1 in either H or L positions and EN should not be left unconnected.
User to program the output voltage. Place a shunt across the H and V
SET
pins of JP4 to set
JP4 U2 V
SET
/FB the output of U2 to the default value of 2.2 V. Place a shunt across the L and V
SET
pins of
JP4 to the output of U2 to the default value of 3.3 V.
To setup the EVM Board operation
1. Connect the positive input power supply to the V
IN
pins on J1/J5.
2. Connect the input power return (ground) to the GND pins on J2/J6. The TPS780xxEVM-301 has a
maximum input voltage of 6 V. The recommended maximum operating input voltage is 5.5 V.
3. Connect the desired load between the Vout (J3/J7) and GND (J4/J8). The TPS780xxx supplies up to
150 mA of output current.
4. Configure jumpers JP1/JP3 and JP2/JP4 according to Table 1 and as required for your application.
TPS780xxEVM-301 2 SLVU235 – March 2008
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