TPS62180EVM-581

User's Guide SLVUA93 – September 2014 TPS62180EVM-581 Evaluation Module This user’s guide describes the characteristics, operation, and use of TI's TPS62180 evaluation module (EVM). The TPS62180EVM-581 (PWR581-001) facilitates the evaluation of the TPS62180 6-A, 2-phase buck converter. The EVM outputs a 3.3-V output voltage from input voltages between 4 V and 15 V. The TPS62180 features Automatic Efficiency Enhancement (AEE™) to deliver efficiencies in excess of 90% across the load current range. The small solution size (99 mm2) and low profile possible enable a very dense power solution in tablets, Solid State Drives (SSDs), and other portable devices. This user’s guide includes setup instructions for the hardware, a printed-circuit board layout for the EVM, a schematic diagram, a bill of materials (BOM), and test results for the EVM. 1 2 3 4 5 Contents Introduction ................................................................................................................... Setup .......................................................................................................................... TPS62180EVM-581 Test Results ......................................................................................... Board Layout ................................................................................................................. Schematic and Bill of Materials ............................................................................................ 1 3 4 5 8 List of Figures 1 Thermal Performance (VIN = 15 V, Load = 6 A).......................................................................... 4 2 Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ω resistor added in series with R1) .............................. 4 3 Assembly Layer .............................................................................................................. 5 4 Top Silk Layer ................................................................................................................ 5 5 Top Layer ..................................................................................................................... 6 6 Internal Layer 1 6 7 Internal Layer 2 7 8 9 .............................................................................................................. .............................................................................................................. Bottom Layer ................................................................................................................. TPS62180EVM-581 Schematic ............................................................................................ 7 8 List of Tables 1 2 1 ..................................................................................... TPS62180EVM-581 Bill of Materials ...................................................................................... Performance Specification Summary 2 9 Introduction The TPS62180 is a 6-A, dual-phase, synchronous, step-down converter in a 2 × 3-mm, WCSP package. Both fixed and adjustable output voltage units are available. AEE is a trademark of Texas Instruments. SLVUA93 – September 2014 Submit Documentation Feedback TPS62180EVM-581 Evaluation Module Copyright © 2014, Texas Instruments Incorporated 1 Introduction 1.1 www.ti.com Performance Specification Table 1 provides a summary of the TPS62180EVM-581 performance specifications. All specifications are given for an ambient temperature of 25°C. Table 1. Performance Specification Summary Specification Test Conditions Input voltage Min Output voltage setpoint 1.2 Max 15 3.3 Output current Soft-start time Typ 4 0 Ramp time of VOUT V V 6 825 Unit A µs Modifications The printed-circuit board (PCB) for this EVM is designed to accommodate the fixed output voltage version of the integrated circuit (IC). Additional input and output capacitors can also be added. A lower profile inductor may also be used to reduce the total solution height. Finally, the input voltage at which the IC turns on can be adjusted with two resistors. 1.2.1 Fixed Output Voltage Operation U1 can be replaced with the fixed output voltage version of the IC for evaluation. For fixed output voltage version operation, replace R2 with a 0-Ω resistor and remove R1. 1.2.2 Input and Output Capacitors C13 and C14 are provided for additional input capacitors. These capacitors are not required for proper operation but can be used to reduce the input voltage ripple. C7, C8, C9, C10, C11, and C12 are provided for additional output capacitors. These capacitors are not required for proper operation but can be used to reduce the output voltage ripple and to improve the load transient response. The total output capacitance must remain within the recommended range in the TPS62180 data sheet (SLVSBB8) for proper operation. 1.2.3 Lower Profile Solutions The TPS62180EVM-581 supports modifications to achieve a lower total solution profile (height). The current EVM gives a maximum height of 2.1 mm. To obtain a lower profile solution, replace both inductors L1 and L2 with a suitable inductor of lower height. An option is the DFE252012P series from Toko which has a maximum profile of 1.2 mm. These inductors fit well on the existing pads for L1 and L2. 1.2.4 Configurable Enable Threshold Voltage With JP1 removed, R4 and R5 can be installed to set a user-selectable input voltage at which the IC turns on. See the equations in the data sheet for details of calculating the resistor values. 2 TPS62180EVM-581 Evaluation Module SLVUA93 – September 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Setup www.ti.com 2 Setup This section describes how to properly use the TPS62180EVM-581. 2.1 Input/Output Connector Descriptions J1 – VIN J2 – S+/S– J3 – GND J4 – VOUT J5 – S+/S– J6 – GND J7 – PG/GND J8 – SS/TR/GND JP1 – EN JP2 – PG Pullup Voltage 2.2 Positive input connection from the input supply for the EVM Input voltage sense connections. Measure the input voltage at this point. Return connection from the input supply for the EVM Output voltage connection Output voltage sense connections. Measure the output voltage at this point. Output return connection The PG output appears on pin 1 of this header with a convenient ground on pin 2 The SS/TR pin voltage appears on pin 2 of this header with a convenient ground on pin 1 EN pin input jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper across OFF and EN to turn off the IC. Remove the jumper to set a configurable enable threshold voltage with R4 and R5. PG pin pullup voltage jumper. Place the supplied jumper on JP2 to connect the PG pin pullup resistor to the output voltage. Alternatively, the jumper can be removed and a different voltage can be supplied on pin 1 to pull up the PG pin to a different level. This externally applied voltage must remain below 7 V. Setup To operate the EVM, set jumpers JP1 and JP2 to the desired positions per Section 2.1. Connect the input supply to J1 and J3 and connect the load to J4 and J6. SLVUA93 – September 2014 Submit Documentation Feedback TPS62180EVM-581 Evaluation Module Copyright © 2014, Texas Instruments Incorporated 3 TPS62180EVM-581 Test Results 3 www.ti.com TPS62180EVM-581 Test Results The TPS62180EVM-581 was used to take the data in the TPS62180 data sheet (SLVSBB8). See the device data sheet for the performance of this EVM. Figure 1. Thermal Performance (VIN = 15 V, Load = 6 A) 180 Gain 150 Phase 120 50 Gain (dB) 40 30 90 20 60 10 30 0 0 -10 -30 -20 -60 -30 -90 -40 -120 -50 -150 -60 100 1000 10000 Frequency (Hz) 100000 Phase (deg) 60 -180 1000000 D001 Figure 2. Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ω resistor added in series with R1) 4 TPS62180EVM-581 Evaluation Module SLVUA93 – September 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Board Layout www.ti.com 4 Board Layout This section provides the TPS62180EVM-581 board layout and illustrations. The Gerbers are available on the EVM product page: TPS62180EVM-581. Rev. B of the PCB just filled the vias under U1 to improve manufacturability. No copper changes were made from Rev. A. Figure 3. Assembly Layer Figure 4. Top Silk Layer SLVUA93 – September 2014 Submit Documentation Feedback TPS62180EVM-581 Evaluation Module Copyright © 2014, Texas Instruments Incorporated 5 Board Layout www.ti.com Figure 5. Top Layer Figure 6. Internal Layer 1 6 TPS62180EVM-581 Evaluation Module SLVUA93 – September 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Board Layout www.ti.com Figure 7. Internal Layer 2 Figure 8. Bottom Layer SLVUA93 – September 2014 Submit Documentation Feedback TPS62180EVM-581 Evaluation Module Copyright © 2014, Texas Instruments Incorporated 7 Schematic and Bill of Materials 5 www.ti.com Schematic and Bill of Materials This section provides the TPS62180EVM-581 schematic and bill of materials. 5.1 Schematic Figure 9 illustrates the TPS62180EVM-581 schematic. DNP TP1 XFL4020-102MEB VIN J1 U1 A1 B1 C1 VIN 4V to 15V J2 C6 100µF S+ S- DNPC13 DNPC14 C1 22µF D1 E1 F1 C2 22µF E4 J3 GND C4 A3 B3 C3 D3 E3 F3 VIN ON EN OFF JP1 L1 VIN1 VIN1 VIN1 SW1 SW1 SW1 VIN2 VIN2 VIN2 SW2 SW2 SW2 DNP TP2 L2 J4 D2 E2 F2 C3 47µF XFL4020-102MEB EN VO PGND PGND PGND PGND PGND PGND C4 DNPC7 47µF DNPC8 DNPC9 VOUT 3.3V 6A DNPC10 DNPC11 DNPC12 S+ SJ5 AGND TPS62180YZF R4 DNP A2 B2 C2 FB PG SS/TR GND A4 2 JP2 J6 1 B4 F4 D4 R1 470k R3 470k R5 DNP R2 150k SS/TR GND PG GND J8 J7 C5 3300pF Figure 9. TPS62180EVM-581 Schematic 8 TPS62180EVM-581 Evaluation Module SLVUA93 – September 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Schematic and Bill of Materials www.ti.com 5.2 Bill of Materials Table 2 lists the BOM for this EVM. Table 2. TPS62180EVM-581 Bill of Materials Quantity Ref Des Value Description Size Part Number Manufacturer 2 C1, C2 22uF CAP, CERM, 22uF, 25V, +/-20%, X5R, 0805 0805 GRM21BR61E226ME44L MuRata 2 C3, C4 47uF CAP, CERM, 47uF, 10V, +/-20%, X5R, 0805 0805 GRM21BR61A476ME15L MuRata 1 C5 3300pF CAP, CERM, 3300pF, 25V, +/-10%, X7R, 0603 0603 GRM188R71E332KA01D MuRata 1 C6 100uF CAP, TA, 100uF, 20V, +/-10%, 0.5 ohm, SMD 7343-43 293D107X9020E2TE3 Vishay-Sprague 2 L1, L2 1uH Inductor, Shielded, Composite, 1uH, 5.4A, 0.01 ohm, SMD 4x2x4mm XFL4020-102MEB Coilcraft 2 R1, R3 470k RES, 470k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07470KL Yageo America 1 R2 150k RES, 150k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07150KL Yageo America 1 U1 TPS62180 (1) 4 - 15V, 6A, 2-Phase Step-Down Converter 2x3mm TPS62180YZF Texas Instruments (1) The TPS62180EVM-581 may be populated with TPS62180 (U1) devices that do not contain the correct top-side markings on the top of the device itself. These devices are still fully-tested TPS62180 devices and meet the specified electrical characteristics of the data sheet. SLVUA93 – September 2014 Submit Documentation Feedback TPS62180EVM-581 Evaluation Module Copyright © 2014, Texas Instruments Incorporated 9 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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