Texas Instruments LM25141-Q1, Руководство пользователя

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2 SNVU623B – October 2018 – Revised April 2020
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LM5143-Q1 EVM User's Guide
Contents
1 High Density EVM Description
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1.1 Typical Applications
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1.2 Features and Electrical Performance
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2 EVM Characteristics
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3 Application Circuit Diagram
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4 EVM Photo
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5 Test Setup and Procedure
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5.1 EVM Connections
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5.2 Test Equipment
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5.3 Recommended Test Setup
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5.4 Test Procedure
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6 Test Data and Performance Curves
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6.1 Conversion Efficiency
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6.2 Operating Waveforms
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6.3 Bode Plots
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6.4 Thermal Performance
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6.5 CISPR 25 EMI Performance
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7 EVM Documentation
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7.1 Schematic
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7.2 Bill of Materials
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7.3 PCB Layout
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7.4 Component Drawings
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8 Device and Documentation Support
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8.1 Device Support
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8.2 Documentation Support
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List of Figures
1 LM5143-Q1 Dual Synchronous Buck Regulator Simplified Schematic
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2 LM5143-Q1 Single-Output, Two-Phase Synchronous Buck Regulator Simplified Schematic
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3 LM5143-Q1 EVM, 100 mm × 75 mm
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4 EVM Test Setup
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5 Dual-Channel Efficiency, V
IN
= 12 V, V
OUT1
= 3.3 V, V
OUT2
= 5 V
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6 Ch1 Efficiency, V
IN
= 12 V, V
OUT1
= 3.3 V, FPWM, Channel 2 OFF
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7 Ch1 Efficiency, V
IN
= 12 V, V
OUT1
= 3.3 V, Diode Emulation, Channel 2 OFF (Log Scale)
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8 Ch2 Efficiency, V
IN
= 12 V, V
OUT2
= 5 V, FPWM, Channel 1 OFF
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9 Ch2 Efficiency, V
IN
= 12 V, V
OUT2
= 5 V, Diode Emulation, Channel 1 OFF (Log Scale)
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10 Two-Phase Regulator Efficiency, V
OUT
= 5 V, FPWM
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11 Two-Phase Regulator Efficiency, V
OUT
= 3.3 V, FPWM
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12 SW Node Voltages, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A
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13 SW Node Voltages, V
IN
= 8 V, I
OUT1
= I
OUT2
= 7 A
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14 Ch1 (3.3 V) Load Transient Response, V
IN
= 12 V, FPWM, 0 A to 7 A at 1 A/µs
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15 Ch1 (3.3 V) Load Transient Response, V
IN
= 12 V, FPWM, 3.5 A to 7 A at 1 A/µs
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16 Ch2 (5 V) Load Transient Response, V
IN
= 12 V, FPWM, 0 A to 7 A at 1 A/µs
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17 Ch2 (5 V) Load Transient Response, V
IN
= 12 V, FPWM, 3.5 A to 7 A at 1 A/µs
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18 Cold-crank Response to V
IN
= 3.8 V, I
OUT1
= I
OUT2
= 1 A
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19 ENABLE ON and OFF, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A Resistive, C
SS1
= C
SS2
= 68 nF
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20 Startup, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A Resistive, C
SS1
= C
SS2
= 68 nF
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21 Shutdown, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A Resistive
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22 Bode Plot, V
IN
= 12 V, V
OUT1
= 3.3 V, I
OUT1
= 7 A Resistive
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23 Bode Plot, V
IN
= 12 V, V
OUT2
= 5 V, I
OUT2
= 7 A Resistive
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24 Thermal Performance, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A, Free Convection Airflow
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