Texas Instruments Evaluation Module for TPS53310: 2.9V to 6V, 3-A Step-Down Converter with Integrated MOSFETs TPS53310EV TPS53310EVM-755 Datenbogen
Produktcode
TPS53310EVM-755
Test Procedure
5.5
Master Enable (J4: EN_MST)
The Master Enable can be set by J4.
Default setting: Jumper on J4
Default setting: Jumper on J4
Table 6. Master Enable Selection
Jumper set to
Enable/Disable Controller
Jumper shorts on J4
Disable 1.5-V Master output
No Jumper on J4
Enable 1.5-V Master output
5.6
Slave Enable (J9: EN_SLV)
The Slave Enable can be set by J9.
Default setting: Jumper on J9
Default setting: Jumper on J9
Table 7. Slave Enable Selection
Jumper set to
Enable/Disable Controller
Jumper shorts on J9
Disable 1.2-V Master output
No Jumper on J9
Enable 1.2-V Master output
6
Test Procedure
6.1
Line/Load Regulation and Efficiency Measurement Procedure
1. Ensure that Load1 and Load2 are set to constant resistance mode and sink 0 A.
2. Ensure that all jumper configuration settings are per
.
3. Ensure that jumpers short on J4, J9 before Vin is applied.
4. Increase Vin from 0 V to 3.3 V. Use V1 to measure input voltage.
5. Remove jumper from J4 to enable the master controller.
6. Vary Load1 from 0 A to 3 A; 1.5-V master output must remain in load regulation.
7. Vary Vin from 2.9 V to 3.5 V; 1.5-V master output must remain in line regulation.
8. Remove jumper from J9 to enable the slave controller.
9. Vary Load2 from 0 A to 3 A; 1.2-V slave output must remain in load regulation.
10. Vary Vin from 2.9 V to 3.5 V; 1.2-V slave output must remain in line regulation.
11. Measure the waveforms of SW_MST (TP6) and SW_SLV (TP18) to see master-slave 180
°
interleaved.
12. Put jumpers on J4, J9 to disable master and slave controller.
13. Decrease Load1 and Load2 to 0 A.
14. Decrease Vin to 0 V.
6.2
Loop Gain/Phase Measurement
1. Set up the EVM as described in
and
. Measure 1.5-V bode plot.
2. Connect the isolation transformer to CHA_MST and CHB_MST.
3. Connect input signal CHA to TP1(CHA_MST), and connect output signal CHB to TP2 (CHB_MST).
4. Connect the GND lead of CHA and CHB to TP25(GND).
5. Inject approximately a 50-mV or less signal through the isolate transformer.
6. Sweep the frequency from 500 Hz to 1 MHz with a 10-Hz or lower post filter. The control loop gain and
phase margin can be measured.
7. Disconnect isolate transformer from the bode plot setup before making other measurements. (Signal
injection into feedback may interfere with accuracy of other measurement.)
9
SLUU826
–
January 2012
Using the TPS53310EVM-755, A 3-A Eco-mode
™
Integrated Switcher With
Master-Slave
Copyright
©
2012, Texas Instruments Incorporated