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The
TPS40200EVM-001
nonsynchronous buck converter to provide a resistor-selected 3.3-V output voltage that
delivers up to 2.5 A from a 12-V input bus. The EVM operates from a single supply and
uses a single P-channel power FET and Schottky diode to produce a low-cost buck
converter. The part operates at a 300-kHz clock frequency with provision for external
frequency synchronization.
1
Description
2
TPS40200EVM-001 Electrical and Performance Specifications
3
Schematic
4
Test Setup
5
TPS40200EVM Typical Performance Data and Characteristic Curves
6
EVM Assembly Drawings and Layout
7
List of Materials
1
TPS40200EVM-001 Schematic
2
TPS40200 Synchronized to a 50% Duty Cycle External Clock
3
TPS40200EVM-001 Recommended Test Setup
4
Output Ripple Measurement - Tip and Barrel Using TP14 and TP15
5
TPS40200EVM-001 Efficiency
6
TPS40200EVM-001 Efficiency
7
TPS40200EVM-001 Line and Load Regulation – Vout = 3.3255 V
8
TPS40200EVM-001 Line and Load Regulation – Vout = 5.0665 V
9
TPS40200EVM-001 Component Placement (Viewed from Top)
10
TPS40200EVM-001 Silkscreen (Viewed from Top)
11
TPS40200EVM-001 Top View
12
TPS40200EVM-001 Bottom View
1
Adjusting V
2
TPS40200EVM-001 Bill of Materials
SLVU147A – February 2006 – Revised March 2006
Submit Documentation Feedback
evaluation
Contents
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List of Figures
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List of Tables
With R6 Rounded to Standard 1% Resistor Values
OUT
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SLVU147A – February 2006 – Revised March 2006
Using the TPS40200
module
(EVM)
uses
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User's Guide
the
TPS40200
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Using the TPS40200
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Table of Contents
Related Manuals for Texas Instruments TPS40200
Summary of Contents for Texas Instruments TPS40200
- Page 1 ..................List of Materials List of Figures ..............TPS40200EVM-001 Schematic ......TPS40200 Synchronized to a 50% Duty Cycle External Clock ..........TPS40200EVM-001 Recommended Test Setup ....... Output Ripple Measurement - Tip and Barrel Using TP14 and TP15 ..............TPS40200EVM-001 Efficiency ..............
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Page 2: Description
0.125 A to 2.5 A. The TPS40200EVM-001 demonstrates the use of the TPS40200 in a typical buck converter application. The board sacrifices some packing density to provide ample test points for module evaluation. This EVM can be modified to support output voltages from 0.7 V to 5 V by changing a single feedback resistor. -
Page 3: Schematic
FET (Q1) whose drain is connected to the oscillator setting node (RC) on the TPS40200. The switching of this transistor over-drives the ramp associated with the internal oscillator and causes the PWM switching to follow the input clock frequency. For reliable operation, the external clock SLVU147A –... -
Page 4: Test Setup
50% duty cycle. The switch node also shown in the picture is switching at the same frequency with a 12-V V supply. The RC operating frequency of the TPS40200 is set by R3 and C5 to be 300 kHz. Figure 2. TPS40200 Synchronized to a 50% Duty Cycle External Clock... -
Page 5: Equipment Setup
6. Connect voltmeter, V2 across J3 pin 3 and J3 pin 2 as shown in Figure 7. Connect the oscilloscope probe to TP14 and TP15 as shown in Figure SLVU147A – February 2006 – Revised March 2006 Using the TPS40200 Submit Documentation Feedback... -
Page 6: Startup/Shutdown Procedure
2. Vary LOAD1 from 0 A to 2.5 A dc. 3. Vary V (V1) from 8 Vdc to 16 V dc. 12V_IN 4. Decrease LOAD1 to 0 A. 5. Decrease V12V_IN to 0 V. Using the TPS40200 SLVU147A – February 2006 – Revised March 2006 Submit Documentation Feedback... -
Page 7: Equipment Shutdown
− Load Current − A NOTE: V = 8-, 12-, and 16-V, V = 3.3 V, I = 0.125 A to 2.5 A 12V_IN 3V3_OUT 1V5_OUT Figure 5. TPS40200EVM-001 Efficiency SLVU147A – February 2006 – Revised March 2006 Using the TPS40200 Submit Documentation Feedback... -
Page 8: Line And Load Regulation
= 12 V 3.326 3.325 = 16 V 3.324 3.323 3.322 − Load Current − A Figure 7. TPS40200EVM-001 Line and Load Regulation – Vout = 3.3255 V Using the TPS40200 SLVU147A – February 2006 – Revised March 2006 Submit Documentation Feedback... -
Page 9: Evm Assembly Drawings And Layout
× 2.12-inch in size, with all components on the top side to allow the user to easily view, probe, and evaluate the TPS40200 control IC in a practical application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space-constrained systems. -
Page 10: Tps40200Evm-001 Component Placement (Viewed From Top
EVM Assembly Drawings and Layout Figure 9. TPS40200EVM-001 Component Placement (Viewed from Top) Using the TPS40200 SLVU147A – February 2006 – Revised March 2006 Submit Documentation Feedback... -
Page 11: Tps40200Evm-001 Silkscreen (Viewed From Top
EVM Assembly Drawings and Layout Figure 10. TPS40200EVM-001 Silkscreen (Viewed from Top) SLVU147A – February 2006 – Revised March 2006 Using the TPS40200 Submit Documentation Feedback... -
Page 12: Tps40200Evm-001 Top View
EVM Assembly Drawings and Layout Figure 11. TPS40200EVM-001 Top View Using the TPS40200 SLVU147A – February 2006 – Revised March 2006 Submit Documentation Feedback... -
Page 13: Tps40200Evm-001 Bottom View
EVM Assembly Drawings and Layout Figure 12. TPS40200EVM-001 Bottom View SLVU147A – February 2006 – Revised March 2006 Using the TPS40200 Submit Documentation Feedback... -
Page 14: List Of Materials
Test Point, 0.020 Hole 0.1 x 0.1 in. TP5, TP6, TP7, TP8, TP9, TP10, TP12, TP16, TP18, TP19, TP20 TPS40200D IC, Low-Cost Sync Buck Controller SO-8 TPS40200D Using the TPS40200 SLVU147A – February 2006 – Revised March 2006 Submit Documentation Feedback... -
Page 15: Evaluation Board/Kit Important Notice
EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. -
Page 16: Important Notice
TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions:...
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