Test Setup
2-4
3) Connect a 2
nd
lab power supply (at least capable to supply 2 A) to the J1
and J3 connector at Vin and GND. The polarity is printed on the board.
Verify that the output voltage limit is set to 13.5 V and that the output is set
to 0 V.
4) Turn on the 12-V lab supply. Turn on the second power supply and ramp
the input voltage up to the desired maximum but not further than 13.5 V.
5) Verify that the output voltage (measured at the V
out1
and V
out2
pins respec-
tively) has the desired value.
Note:
1)
With very small loads (<100
µ
A) you will measure a small output volt-
age even with the device in shutdown. This is due to offset voltages of
the opamps U6 and U7.
2)
If you plan to insert a socket for DUT, you will have to remove the jumper
wires from the socket area. The socket has internal connections.
Figure 2–2. Test Setup
NOTE: All wire pairs should be twisted.
Summary of Contents for TPS76933
Page 15: ...Board Layout 1 9 Introduction Figure 1 5 Assembly Drawing top assembly...
Page 16: ...1 10...
Page 30: ...3 10...
Page 36: ...4 6...