SLUU406A
February 2010 – January 2022
CSD16322Q5
,
CSD16410Q5A
,
TPS40303
,
TPS40304
,
TPS40305
Trademarks
1
Description
1.1
Applications
1.2
Features
2
TPS40305EVM-488 Electrical Performance Specifications
3
TPS40305EVM-488 Schematic
4
Connector and Test Point Descriptions
4.1
Enable Jumper (JP2)
4.2
Frequency Spread Spectrum – FSS Jumper (JP1)
4.3
Test Point Descriptions
4.3.1
Input Voltage Monitoring (TP1 and TP2)
4.3.2
Output Voltage Monitoring (TP3 and TP4)
4.3.3
Loop Response Testing (TP5, TP6, TP7, TP8, and R3)
4.3.4
Error Amplifier Voltage Monitoring (TP9, TP10, and TP11)
4.3.5
Switching Waveform Monitoring (TP12, TP13, TP14, and TP15)
4.3.6
Power-Good Voltage Monitoring (TP16 and TP18)
4.3.7
Enable and Soft-Start Voltage Monitoring (TP17 and TP18)
5
Test Set Up
5.1
Equipment
5.1.1
Voltage Source
5.1.2
Meters
5.1.3
Loads
5.1.4
Oscilloscope
5.1.5
Recommended Wire Gauge
5.1.6
Other
5.2
Equipment Setup
5.2.1
Procedure
5.2.2
Diagram
5.3
Start-Up/Shutdown Procedure
5.4
Output Ripple Voltage Measurement Procedure
5.5
Control Loop Gain and Phase Measurement Procedure
5.6
Equipment Shutdown
6
TPS40305EVM-488 Test Data
6.1
Efficiency
6.2
Line and Load Regulation
6.3
Output Voltage Ripple
6.4
Switch Node
6.5
Control Loop Bode Diagram
6.6
Additional Waveforms
6.6.1
Output Ripple with Frequency Spread Spectrum (FSS) Enabled
7
TPS40305EVM-488 Assembly Drawings and Layout
8
TPS40305EVM-488 Bill of Materials
9
Revision History
5.3
Start-Up/Shutdown Procedure
Verify shunt position for JP1 for desired FSS status.
Remove shunt from JP2 location if present.
Increase V
IN
from 0 V
DC
to 12 V
DC
.
Vary LOAD1 from 0 A
DC
to 10 A
DC
.
Vary V
IN
from 8 V to 14 V.
Decrease V
IN
to 0 V.
Decrease LOAD1 to 0 A.