Texas Instruments TPS7H4002EVM-CVAL, User Manual

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3 TPS7H4002EVM-CVAL Initial Setup
This section provides the test instruments required and the connections to the EVM.
1. Input DC power supply
a. Set for 5-V DC, 3-A current limit.
b. Connect the positive output of the DC supply to connector J2 (PVIN) and the negative terminal of the
supply to connector J5 for ground.
Note
For more precise measurements, eliminating the IR voltage drop in the input cables is
achieved by using a power supply source with sensing ports and connecting between TP6
to PVIN and TP23 to GND.
2. DC electronic load
a. Connect the positive DC input to connector J8 (VOUT) using a 16-AWG wire.
Note
Wire to the e-load should include at least some part in which the wire gauge can be strapped
by the oscilloscope current probe. This will eliminate the need for a setup change to when
making transient measurements.
b. Connect the negative DC input of e-load to connector J7 (GND) using a 16-AWG wire.
c. Connect voltage monitoring sensing ports of e-load across test points TP17 (VOUT) and TP26 (GND). A
voltage meter can be used to monitor this voltage also.
3. Oscilloscope
a. CH1 - Connect the voltage scope probe to scope probe test point J4 (PH) to monitor the phase node.
DC coupled, Full BW, 2 V/div, Rising Edge Trigger at 0.5 V.
b. CH2 - Connect voltage scope probe to scope probe test point J9 (VOUT) to monitor the output voltage.
AC coupled, BW = 20 MHz, 10 mV/div.
c. CH3 - Connect current scope probe to monitor current through wire connecting J8 (VOUT) and e-load. 5
A/div
Note
Only required for transient load testing
Table 3-1. Summary of Connections
Reference
Designator
Silkscreen Function
J2,
J5
PVIN Input power: J2 = 5 V, J5 = GND (Vsupply)
J8,
J7
VOUT Output current: J8 = VOUT J7 = GND, pin 2 = VOUT ≈ 1 V (e-load)
J6 PH4 Phase switching node scope probe test point (Scope CH-1)
J9 VOUT VOUT scope probe test point (Scope CH-2)
TP17 VOUT VOUT test point (e-load monitor)
TP6 PVIN PVIN test point (Vsupply_sense)
TP18, TP23 GND GND test points ( e-load monitor, Vsupply_sense)
TPS7H4002EVM-CVAL Initial Setup www.ti.com
4 TPS7H4002EVM-CVAL Evaluation Module SLVUBI1 – MAY 2021
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