Datasheet
6 Power-Up/Power-Down Test Procedures
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Power-Up/Power-Down Test Procedures
The following test procedure is recommended primarily for powering up and shutting down the EVM.
Whenever the EVM is running the fan should be turned on. Also, never walk away from a powered EVM
for extended periods of time.
1. Working at an ESD workstation, make sure that any wrist straps, boot straps or mats are connected
referencing the user to earth ground before power is applied to the EVM. Electrostatic smock and
safety glasses should also be worn.
2. Connect power supplies, loads, voltage meters and current meters as shown in Figure 3
3. Set 100-mil shunt jumpers as described in the User Configuration Jumper Settings for desired
operational configuration. ( Note: Do not attempt to change jumper settings during operation)
4. Ensure S3 and S5 are set to the S4/S5 state to ensure the outputs initially disabled before applying the
input voltage. See Figure 2 for details.
5. Increase V
DD
from 0 VDC to 5 VDC. Using V3, verify V
DD
voltage between 4.75 V and 5.25 V.
6. Increase V
IN
from 0 VDCto 12 VDC. Using V1, verify V
IN
voltage between 11 V and 13 V.
7. Switch S3 and S5 to the S0 state to enable the outputs. See Figure 2 for details.
8. Vary LOAD1 from 0 ADC to 10 ADC.
9. Ensure that V
TT
is off before starting LOAD2.
10. Vary LOAD2 from 0 A to 3 A (0 A to -3A on meter A5) to test LDO source capability.
11. Set LOAD2 to 0 A before turning on V
TT
.
12. Vary V
TT
to obtain A5 between 0 A to +3 A. to test LDO sink capability. (Note: Running both V
TT
and
LOAD2 at the same time causes V
TT
to source additional current through LOAD2. A5 reads the
summation of the LOAD2 current and LDO sink current)
13. Vary LOAD3 from 0 mA to 10mA. (Note: Do not exceed 10 mA on LOAD3)
14. Vary V
IN
from 4.5 V to 28 V.
15. Vary V
DD
from 4.75 V to 5.25 V.
16. Use state S3 and state S5 switches to test sleep states.
17. Increase V
IN
to 12 VDC
18. Decrease LOAD3 to 0 mA.
19. Decrease LOAD2 to 0 A.
20. Decrease LOAD3 to 0 A.
21. Decrease V
IN
to 0 V.
22. Decrease V
DD
to 0V.
SLUU202A – SEPTEMBER 2004 – Revised November 2008 Using the TPS51116EVM 11
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