Texas Instruments TPS5420EVM-175 SWIFT Скачать руководство пользователя страница 3 | Manualshive

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Texas Instruments TPS5420EVM-175 SWIFT Скачать руководство пользователя страница 3

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1.3.2

Input Voltage Range

2

Test Setup and Results

2.1

Input / Output Connections

2.2

Efficiency

Test Setup and Results

Table 3. Output Voltages Available

Output Voltage (V)

R2 Value (k

Ω

)

1.8

21.5

2.5

9.53

3.3

5.90

5

3.24

The EVM is designed to operate from a 10-V to 36-V input voltage range. The TPS5420 is specified to
operate over an input voltage range of 5.5 V to 36 V.

This section describes how to properly connect, set up, and use the TPS5420EVM-175 evaluation
module. The section also includes test results typical for the TPS5420EVM-175 and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up.

The TPS5420EVM-175 is provided with input/output connectors and test points as shown in

Table 4

. A

power supply capable of supplying 2 A should be connected to J1 through a pair of 20 AWG wires. The
load should be connected to J3 through a pair of 20 AWG wires. The maximum load current capability
should be 2 A. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1 provides a
place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP3 is used to
monitor the output voltage with TP4 as the ground reference.

Table 4. EVM Connectors and Test Points

Reference Designator

Function

J1

VIN, 10 V to 36 V

J2

OUT, 5 V at 2 A maximum

JP1

2-pin header for enable. Connect EN to ground to disable, open to enable.

TP1

VIN test point at VIN connector

TP2

GND test point at VIN

TP3

Output voltage test point at OUT connector

TP4

GND test point at OUT connector

TP5

Test point between voltage divider network and R3. Used for loop response measurements.

TP6

PH test point

The TPS5420EVM-175 efficiency peaks at load current of about 0.75 A, and then decreases as the load
current increases towards full load.

Figure 1

shows the efficiency for theTPS5420EVM-175 at an ambient

temperature of 25

°

C. The efficiency is lower at higher ambient temperatures, due to temperature variation

in the drain-to-source resistance of the MOSFETs.

SLVU163 – April 2006

TPS5420EVM-175 SWIFT™ Regulator Evaluation Module

3

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Содержание TPS5420EVM-175 SWIFT

Страница 1: ...ints 3 5 TPS5420EVM 175 Bill of Materials 13 This user s guide contains background information for the TPS5420 as well as support documentation for the TPS5420EVM 175 evaluation module HPA175 Also included are the performance specifications the schematic and the bill of materials for the TPS5420EVM 175 The TPS5420 dc dc converter is designed to provide up to a 2 A continuous 3 A peak output from a...

Страница 2: ...PECIFICATION TEST CONDITIONS MIN TYP MAX UNIT VIN voltage range 10 36 V Output voltage set point 5 0 V Output current range VIN 10 V to 36 V 0 2 5 A Line regulation IO 1 A VIN 3 V 6 V 0 11 Load regulation VIN 25 V IO 0 A to 2 5 A 0 1 Load transient response Voltage change IO 0 75 A to 2 25 A 40 mV Recovery time 200 µs Voltage change IO 2 25 A to 0 75 A 40 mV Recovery time 200 µs Loop bandwidth VIN...

Страница 3: ...hould be 2 A Wire lengths should be minimized to reduce losses in the wires Test point TP1 provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference TP3 is used to monitor the output voltage with TP4 as the ground reference Table 4 EVM Connectors and Test Points Reference Designator Function J1 VIN 10 V to 36 V J2 OUT 5 V at 2 A maximum JP1 2 pin header fo...

Страница 4: ...0 0 10 0 20 0 30 0 0 5 1 1 5 2 I Output Current A O Output Regulation Test Setup and Results Figure 1 Measured Efficiency TPS5420 The output voltage load regulation of the TPS5420EVM 175 is shown in Figure 2 the output voltage line regulation is shown in Figure 3 Measurements are given for an ambient temperature of 25 C Figure 2 Load Regulation 4 TPS5420EVM 175 SWIFT Regulator Evaluation Module SL...

Страница 5: ...00 m VOUT 50 mV Div AC Coupled Test Setup and Results Figure 3 Line Regulation The TPS5420EVM 175 response to load transients is shown in Figure 4 The current step is from 25 to 75 of maximum rated load Total peak to peak voltage variation is as shown including ripple and noise on the output Figure 4 Load Transient Response TPS5420 SLVU163 April 2006 TPS5420EVM 175 SWIFT Regulator Evaluation Modul...

Страница 6: ...sponse characteristics are shown in Figure 5 Gain and phase plots are shown for VIN voltage of 25 V and a 1 A load current Figure 5 Measured Loop Response TPS5420 VIN 25 V The TPS5420EVM 175 output voltage ripple is shown in Figure 6 The input voltage is VIN 25 V for the TPS5420 Output current is the rated full load of 2 A Voltage is measured directly across output capacitors Figure 6 Measured Out...

Страница 7: ...en the input voltage reaches the internally set UVLO threshold voltage of 5 3 V the slow start sequence begins The internal reference begins to ramp up linearly at the internally set slow start rate towards 1 221 V and the output ramps up toward the set voltage of 5 V The output may be inhibited by using a jumper at JP1 to tie ENA to GND When the jumper is removed ENA is released and the slow star...

Страница 8: ...e remaining pins of the TPS5420 and a large area filled with ground The bottom layer contains ground and some signal routing The top and bottom and internal ground traces are connected with multiple vias placed around the board including four vias directly under the TPS5420 device to provide a thermal path from the PowerPAD land to ground The input decoupling capacitors C1 and C4 and bootstrap cap...

Страница 9: ...www ti com Board Layout Figure 10 Top Side Layout SLVU163 April 2006 TPS5420EVM 175 SWIFT Regulator Evaluation Module 9 Submit Documentation Feedback ...

Страница 10: ...www ti com Board Layout Figure 11 Bottom Side Layout Looking From Top Side 10 TPS5420EVM 175 SWIFT Regulator Evaluation Module SLVU163 April 2006 Submit Documentation Feedback ...

Страница 11: ...ls Schematic and Bill of Materials Figure 12 Top Side Assembly The TPS5420EVM 175 schematic and bill of materials are presented in this section SLVU163 April 2006 TPS5420EVM 175 SWIFT Regulator Evaluation Module 11 Submit Documentation Feedback ...

Страница 12: ...Schematic and Bill of Materials The schematic for the TPS5420EVM 175 is shown in Figure 13 Figure 13 TPS5420EVM 175 Schematic TPS5420EVM 175 SWIFT Regulator Evaluation Module 12 SLVU163 April 2006 Submit Documentation Feedback ...

Страница 13: ...7 x 0 25 ED1514 OST 1 JP1 Header 2 pin 100mil spacing 36 pin strip 0 100 x 2 PTC36SAAN Sullins 1 L1 33 µH Inductor SMT 2 2A 75milliohm 0 484 x 0 484 MSS1260 333 Coilcraft 1 R1 10 0 k Resistor Chip 1 16W 1 0603 Std Std 1 R2 3 24 k Resistor Chip 1 16W 1 0603 Std Std 1 R3 0 Resistor Chip 1 16W 1 0603 Std Std 4 TP1 TP3 Test Point Red Thru Hole Color Keyed 0 100 x 0 100 5000 Keystone TP5 TP6 2 TP2 TP4 ...

Страница 14: ...armless against any damages liabilities or costs resulting from any claim suit or proceeding arising from user s handling or use of the EVM including but not limited to I claims that the EVM infringes a third party s intellectual property and ii claims arising from the user s use or handling of the EVM TI shall have no responsibility to defend any such claim suit or proceeding User assumes all res...

Страница 15: ...onents include but are not limited to linear regulators switching transistors pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post Office B...

Страница 16: ...tute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is...

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