Техническая Спецификация для Texas Instruments 8-14V Vin, 1.8V Vout Synchronous Buck Converter Evaluation Module for TPS40305 TPS40305EVM-488 TPS40305EVM-488
Модели
TPS40305EVM-488
Network
Analyzer
Isolation
Transformer
LOAD1
1.2V @
20A
+
-
V2
-
+
See Tip and Barrel
Measurement for
Vout ripple
V1
+
-
A1
-
+
V
IN
Oscilloscope
1MW, AC
20mV / div
20MHz
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Test Set Up
Figure 4. Control Loop Measurement Setup
5.3
Start Up/Shut Down Procedure
1. Verify shunt position for JP1 for desired FSS status per section 4.1.2
2. Remove shunt from JP2 location if present
3. Increase VIN from 0Vdc to 12Vdc
4. Vary LOAD1 from 0Adc to 10Adc
5. Vary VIN from 8V to 14V
6. Decrease VIN to 0V
7. Decrease LOAD1 to 0A
2. Remove shunt from JP2 location if present
3. Increase VIN from 0Vdc to 12Vdc
4. Vary LOAD1 from 0Adc to 10Adc
5. Vary VIN from 8V to 14V
6. Decrease VIN to 0V
7. Decrease LOAD1 to 0A
5.4
Output Ripple Voltage Measurement Procedure
1. Follow section 5.3 Start-Up / Shut-Down Procedure steps 1 – 5 to set VIN and LOAD1 to the desired
operating condition
2. Connect oscilloscope probe with exposed metal barrel to TP3 and TP4 per
3. Set oscilloscope per oscilloscope for output voltage ripple measurement in section 5.1.4
4. Follow section 5.3 Start-Up / Shut-Down Procedure steps 6 and 7 to power down
4. Follow section 5.3 Start-Up / Shut-Down Procedure steps 6 and 7 to power down
5.5
Control Loop Gain and Phase Measurement Procedure
1. Follow section 5.3 Start-Up / Shut-Down Procedure steps 1 – 5 to set VIN and LOAD1 to desired
operating condition
(a) If JP1 is installed (FSS enabled), loop response data about the modulation frequency (30kHz) may
be affected
9
SLUU406 – February 2010
TPS40305EVM-488
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