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Using the TPS51513EVM-549 A Single-Phase,

D-CAP+™ Synchronous Buck Controller With

Integrated Drivers for General IC V

CORE

Applications

User's Guide

Literature Number: SLVU358

February 2010

Summary of content (25 pages)

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Using the TPS51513EVM-549 A Single-Phase, D-CAP+™ Synchronous Buck Controller With Integrated Drivers for General IC VCORE Applications User's Guide Literature Number: SLVU358 February 2010
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1 2 3 4 5 6 7 8 9 ......................................................................................................................... 6 1.1 Typical Application ...................................................................................................... 6 1.2 Features .................................................................................................................. 6 Electrical Performance Specifications ...................................................................
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www.ti.com List of Figures 1 TPS51513EVM-549 Schematic, Sheet 1 of 2 ........................................................................... 8 2 TPS51513EVM-549 Schematic, Sheet 2 of 2 ........................................................................... 9 3 Tip and Barrel Measurement for Vout Ripple .......................................................................... 10 4 TPS51513EVM-549 Recommended Test Set Up .....................................................................
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www.ti.com List of Tables 1 TPS51513EVM-549 Electrical Performance Specifications ........................................................... 7 2 Current Limit Trip Selection .............................................................................................. 12 3 Frequency Selection ...................................................................................................... 12 4 Overshoot Reduction Selection .......................................................................
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User's Guide SLVU358 – February 2010 Using the TPS51513EVM-549 A Single-Phase, D-CAP+™ Synchronous Buck Controller With Integrated Drivers for General IC VCORE Applications The TPS51513EVM-549 evaluation module (EVM) is a single-phase, D-CAP+™ synchronous buck converter providing 3-bit VID with 0.70-V to 1.05-V output range at up to 20 A from a 12-V input bus. The EVM uses the TPS51513 synchronous buck controller with selectable 250/300/350/500-kHz switching frequency.
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Electrical Performance Specifications www.ti.com 2 Electrical Performance Specifications Table 1. TPS51513EVM-549 Electrical Performance Specifications (1) PARAMETER TEST CONDITIONS MIN TYP 8 12 MAX UNITS Input Characteristics Voltage range VIN Maximum input current VIN = 8 V,1.05 V/20 A at 300 kHz 3.0 14 V A No load input current Vin = 14 V, Io = 0 A 10 mA Output Characteristics Output voltage VOUT VID0 = VID1 = VID2 = 0 Output voltage regulation Line regulation 0.
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Schematic 3 www.ti.com Schematic Figure 1.
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Schematic www.ti.com Figure 2.
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Test Setup 4 Test Setup 4.1 Test Equipment www.ti.com Voltage Source: The input voltage source Vin must be a 0-V to 14-V variable dc source capable of supplying 10 Adc. Connect Vin to J1 as shown in Figure 4. Multimeters: A 0-V to 14-V voltmeter (V1) must be used to measure Vin at TP1 (Vin) and TP2 (GND). A 0-V to 5-V voltmeter (V2) is necessary for Vout measurement at TP5(Vout) and TP8(GND). A 0-A to 10-A current meter (A1) as shown in Figure 4 is used for input current measurements.
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Configuration www.ti.com 4.2 Recommended Test Setup Load + V2 DC + Source Vin - V1 A1 Figure 4. TPS51513EVM-549 Recommended Test Set Up Figure 4 is the recommended test set up to evaluate the TPS51513EVM-549. Working at an ESD workstation, ensure that any wrist straps, bootstraps, or mats are connected, referencing the user to earth ground before handling the EVM. Input Connections: 1. Prior to connecting the dc input source Vin, it is advisable to limit the source current from Vin to 10 A maximum.
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Configuration 5.1 www.ti.com Current Limit Trip Selection (J8: Trip Select) The overcurrent protection (OCP) can be set by J8 Trip Select (TRIPSEL). Default setting is 29A. Table 2. Current Limit Trip Selection 5.2 Jumper Set to TRIPSEL OCP Limit per Phase(Typ.) Top (1-2 pin shorted) 5VFILT 29A Second (3-4 pin shorted) 3.
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Test Procedure www.ti.com Table 5. VID Bits Selection (continued) 3-Bit VID Table (1 = 1VBIAS, 0 = GND) 5.5 VID2 VID1 VID0 Vout (V) 1 1 1 0.70 Sleep Mode Selection (SLP) The SLP can be set by J5 (SLP). Default setting Jumper on pin2 and pin3 of J5 to disable the SLP mode. Table 6. SLP Mode Selection 5.6 Jumper set to SLP mode selection 2-3 pin shorted Disable SLP mode 1-2 pin shorted Enable SLP mode 1.2-V Output Voltage Option (J10: Vout selection) The 1.
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Performance Data and Typical Characteristic Curves www.ti.com Table 8. Functions of Each Test Points (continued) 6.3 Test Points Name Description TP8 GND Vout Ground Input B for loop injection TP9 CHB TP10 GND Ground TP11 1Vbias 1-V bias TP12 PG# Negative Power Good, Active low TP13 PGOOD Power Good, Active high TP14 GND Ground TP15 5Vbias 5-V bias TP16 3.3Vbias 3.
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Performance Data and Typical Characteristic Curves www.ti.com 7.2 Load Regulation 1.1 VO - Output Voltage - V 1.08 VI = 8V 1.06 VI = 12 V 1.04 VI = 14 V 1.02 1 0.001 0.01 0.1 1 IO - Output Current - A 10 100 Figure 6. TPS51513EVM-549 Load Regulation 7.3 Line Regulation 1.1 VO - Output Voltage - V 1.08 IO = 20 A IO = 0 A 1.06 1.04 IO = 10 A 1.02 1 8 9 10 11 12 VI - Input Voltage - V 13 14 Figure 7.
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Performance Data and Typical Characteristic Curves 7.4 www.ti.com Current Monitor Voltage 3.5 3 Measured VIMON - V 2.5 2 Calculated 1.5 1 0.5 0 0 5 10 15 IO - Output Current - A 20 25 Figure 8. TPS51513EVM-549 IMON Voltage 7.5 Output Ripple TPS1513EVM Output Ripple Test condition: 12 Vin, 1.05/20 A CH1: 1.05 V Output Ripple Figure 9. TPS51513EVM-549 Output Ripple (12 Vin, 1.
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Performance Data and Typical Characteristic Curves www.ti.com 7.6 Switching Node TPS1513EVM Enable Switching Node Test condition: 12 Vin, 1.05 V/20 A CH1: SW Figure 10. TPS51513EVM-549 Switching Node (12 Vin, 1.05 V/20 A) 7.7 Output Transient TPS1513EVM Transient Test condition: 12 Vin, 1.05/10 A-20 A CH1: 1.05 V Output CH4: Output Current Figure 11. TPS51513EVM-549 Output Transient (12 Vin, 1.
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Performance Data and Typical Characteristic Curves 7.8 www.ti.com Turn On Waveform TPS1513EVM Enable Start up Test condition: 12 Vin, 1.05/10 A-20 A CH2: 1.05 V Output CH3: PGOOD CH4: PG# Figure 12. TPS51513EVM-549 Enable Turnon Waveform (12 Vin, 1.05 V/20 A) 7.9 Turn Off Waveform TPS1513EVM Enable Shut down Test condition: 12 Vin, 1.05/10 A CH1: Enable CH2: 1.05 V Output CH3: PGOOD CH4: PD# Figure 13. TPS51513EVM-549 Enable Turnoff Waveform (12 Vin, 1.
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EVM Assembly Drawing and PCB Layout www.ti.com 7.10 Bode Plot Figure 14. TPS51513EVM-549 Bode Plot (12 Vin, 1.05 V/17 A) 8 EVM Assembly Drawing and PCB Layout The following figures (Figure 15 through Figure 22) show the design of the TPS51513EVM-549 printed-circuit board. The EVM has been designed using a six-layer circuit board with 2-oz copper on outside layers.
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EVM Assembly Drawing and PCB Layout www.ti.com Figure 15. TPS51513EVM-549 Top Layer Assembly Drawing (Top view) Figure 16.
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EVM Assembly Drawing and PCB Layout www.ti.com Figure 17. TPS51513EVM-549 Top Copper (Top View) Figure 18.
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EVM Assembly Drawing and PCB Layout www.ti.com Figure 19. TPS51513EVM-549 Internal Layer 3 (Top View) Figure 20.
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EVM Assembly Drawing and PCB Layout www.ti.com Figure 21. TPS51513EVM-549 Internal Layer 5 (Top View) Figure 22.
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Bill of Materials 9 www.ti.com Bill of Materials Table 9. The EVM Components List According to the Schematic Shown in Figure 1 and Figure 2 QTY RefDes 24 Description MFR Part Number 1 C1 Capacitor, Ceramic, 4700pF, 25V, X7R, 10%, 0603 STD STD 1 C10 Capacitor, Ceramic, 0.022µF, 25V, X7R, 10%, 0603 STD STD 1 C12 Capacitor, Ceramic, 1µF, 50V, X5R, 10%, 0603 STD STD 6 C13, C14, C15, C16, C17, C19 Capacitor, Ceramic, 100µF, 6.
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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.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.