Texas Instruments TPS54614EVM 1.8-V SWIFT Скачать руководство пользователя страница 17 | Manualshive

Страница: 17 / 33

Texas Instruments TPS54614EVM 1.8-V SWIFT Скачать руководство пользователя страница 17

Output Voltage Regulation

2-5

Setup and Test Results

2.4

Output Voltage Regulation

The output voltage load regulation at 25

°

C is shown in Figure 2–6. The output

voltage varies less than 0.3% over the entire input voltage range of 3.3 V to
5.0 V, and load range of 0 A to 6 A.

Figure 2–6. Measured Load Regulation

0.997

0.998

0.999

1

1.001

1.002

1.003

0

1

2

3

4

5

6

IL– Load Current – A

VI = 5 V

VI = 3.3 V

TA = 25

°

C

Output V

oltage

(Normalized to 3-A

Load)

«
...
15
16
17
18
19
...
»

Содержание TPS54614EVM 1.8-V SWIFT

Страница 1: ...September 2001 PMP PD PS User s Guide SLVU053...

Страница 2: ...t that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in wh...

Страница 3: ...handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s r...

Страница 4: ...here is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 60 C The EVM is design...

Страница 5: ...FCC Warning This equipment is intended for use in a laboratory test environment only It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of...

Страница 6: ...vi...

Страница 7: ...Input Output Connections 2 2 2 2 Efficiency 2 3 2 3 Thermal Performance 2 4 2 4 Output Voltage Regulation 2 5 2 5 Load Transients 2 6 2 6 Loop Characteristics 2 7 2 7 Output Voltage Ripple 2 8 2 8 In...

Страница 8: ...red Loop Gain 2 7 2 10 Measured Loop Phase 2 7 2 11 Measured Output Voltage Ripple With 3 3 V Input 2 8 2 12 Measured Output Voltage Ripple With 5 0 V Input 2 8 2 13 Measured Input Ripple Voltage With...

Страница 9: ...ort documentation for the TPS54614 EVM evaluation module The TPS54614 EVM performance specifications are given as well as modification instructions if different preset output voltages are desired Topi...

Страница 10: ...output inductor and output capacitor For guidelines on selecting an output inductor and output capacitor for a specific application refer to Texas Instruments application report SLVA105 Designing With...

Страница 11: ...tput voltages 2 5 V and higher the output capacitor C1 also needs to be changed Table 1 2 lists the devices required for U1 and C1 for different output voltage options Table 1 2 Modification Table Out...

Страница 12: ...1 4...

Страница 13: ...TPS54614 and covers efficiency output voltage regulation load transients loop response output ripple and start up Topic Page 2 1 Input Output Connections 2 2 2 2 Efficiency 2 3 2 3 Thermal Performanc...

Страница 14: ...capable of supplying 5 A to J1 through a pair of 20 AWG wires Connect the load to J2 through a pair of 16 AWG wires Wire lengths should be minimized on both the input and output connections Figure 2 1...

Страница 15: ...FETs The total board losses are shown in Figure 2 3 The plots of Figure 2 4 and Figure 2 5 are extended out to current levels where the TPS54614 junction temperature reaches 125 C at 25 C ambient When...

Страница 16: ...e junction temperature low at high output currents With a 3 3 V input source and a 6 A load the junction temperature is approximately 65 C while the case temperature is approximately 59 C Figure 2 4 M...

Страница 17: ...25 C is shown in Figure 2 6 The output voltage varies less than 0 3 over the entire input voltage range of 3 3 V to 5 0 V and load range of 0 A to 6 A Figure 2 6 Measured Load Regulation 0 997 0 998...

Страница 18: ...5 A to 4 5 A in 16 s while the load transient in Figure 2 8 transitions from 4 5 A to 1 5 A in 12 s The transient response can be improved at the cost of adding additional capacitance to the output Fi...

Страница 19: ...hown in Figure 2 9 and Figure 2 10 The loop crossover frequency is approximately 50 kHz and the phase margin is approximately 46 Figure 2 9 Measured Loop Gain 20 10 0 10 20 30 40 50 10 100 1000 10000...

Страница 20: ...3 3 V input and in Figure 2 12 for a 5 0 V input The TPS54614 has a typical output voltage ripple of less than 15 mVpp Figure 2 11 Measured Output Voltage Ripple With 3 3 V Input IO 10 mV div VI 3 3 V...

Страница 21: ...Figure 2 14 for a 5 0 V input With a 5 0 V input the ripple is approximately 260 mVpp The input voltage ripple can be made lower by adding capacitance to the input Figure 2 13 Measured Input Voltage R...

Страница 22: ...o rise when the input rises above the 3 0 V startup level The output voltage then ramps linearly to 1 8 V in 3 6 ms The start up time is independent of input voltage and load The slow start time can b...

Страница 23: ...3 1 Board Layout Board Layout This chapter provides the TPS54614 EVM board layout illustrations Topic Page 3 1 Layout 3 2 Chapter 3...

Страница 24: ...the output sense point test point TP3 A wide power ground plane is used to keep the input ground current from injecting noise between the analog and power grounds A total of 14 vias are used to tie th...

Страница 25: ...Layout 3 3 Board Layout Figure 3 2 Top Side Layout...

Страница 26: ...Layout 3 4 Figure 3 3 Internal Layers Layout...

Страница 27: ...Layout 3 5 Board Layout Figure 3 4 Bottom Side Layout...

Страница 28: ...3 6...

Страница 29: ...atic and Bill of Materials Schematic and Bill of Materials This chapter provides a schematic diagram and bill of materials for the TPS54614 EVM Topic Page 4 1 Schematic 4 2 4 2 Bill of Materials 4 3 C...

Страница 30: ...VIN VIN VIN VIN PH PH PH PH PH PH PH PH PH BOOT PGND PGND PGND PGND PGND PwrPad AGND VSENSE PWRGD VBIAS SS ENA FSEL RT U1 TPS54614PWP 28 27 26 25 4 3 2 1 C5 10 F C4 220 F TP1 VIN 2 TP4 1 J1 VIN GND TP...

Страница 31: ...eramic 10 F 10 V X5R 20 1210 Panasonic ECJ 4YB1A106K C6 Open Unpopulated 603 1 J1 Terminal block 2 pin 6 A 3 5 mm 0 27 0 25 OST ED1514 1 J2 Terminal block 2 pin 15 A 5 1 mm 0 40 0 35 OST ED1609 1 J3 H...

Страница 32: ...4 4...

Страница 33: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TPS54614EVM 183...

Отзывы:

Нет отзывов