TPS62693EVM-076

User's Guide SLVU529A – September 2011 – Revised November 2011 TPS6269xEVM-076 Evaluation Module This user’s guide describes the characteristics, operation, and use of the TPS6269xEVM-076 evaluation module (EVM). The TPS6269xEVM-076 is a fully assembled and tested platform for evaluating the performance of the TPS6269x high-frequency, synchronous, step-down dc-dc converters optimized for battery-powered portable applications. This document includes schematic diagrams, a printed circuit board (PCB) layout, bill of materials, and test data. Throughout this document, the abbreviations EVM, TPS6269xEVM, and the term evaluation module are synonymous with the TPS62690/1/2/3EVM-076 unless otherwise noted. 1 2 3 4 5 6 7 8 Contents Introduction .................................................................................................................. 2 1.1 Features ............................................................................................................. 2 1.2 Applications ......................................................................................................... 2 1.3 EVM Ordering Options ............................................................................................ 2 TPS62690/1/2/3EVM Schematic .......................................................................................... 3 Connector and Test Point Descriptions .................................................................................. 3 3.1 Input/Output Connectors: TPS6269xEVM ...................................................................... 3 3.2 Jumpers and Switches ............................................................................................ 4 Test Configurations ......................................................................................................... 5 4.1 Hardware Setup .................................................................................................... 5 4.2 Procedure ........................................................................................................... 5 TPS62691EVM Test Data ................................................................................................. 6 5.1 Efficiency ............................................................................................................ 6 5.2 Start-up .............................................................................................................. 7 5.3 Output Voltage Ripple (Power-Save Mode) .................................................................... 8 5.4 Output Voltage Ripple (PWM) .................................................................................... 9 TPS62690/1/2/3EVM Assembly Drawing and Layout ................................................................ 10 TPS62690/1/2/3EVM Bill of Material .................................................................................... 13 Marking Information for this EVM ....................................................................................... 13 List of Figures 1 TPS6269xEVM Schematic ................................................................................................. 3 2 JP3 and LP1 Set Up ........................................................................................................ 4 3 Hardware Board Connection 4 Efficiency vs Load current for the TPS62691 5 6 7 8 9 10 11 12 13 14 ............................................................................................. ........................................................................... TPS62691 Start-Up Using EN With No Load, Vin = 3.6 V and Vout = 2.2 V ...................................... TPS62691 Start-up Using EN With 200-mA Load, Vin = 3.6 V and Vout = 2.2 V ................................. Power-Save Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA ................................... PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA ........................................... PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 200 mA .......................................... TPS62690/1/2/3EVM Component Placement (Top View) ........................................................... TPS62690/1/2/3EVM Top-Side Copper (Top View) .................................................................. TPS62690/1/2/3EVM L2-Side Copper .................................................................................. TPS62690/1/2/3EVM L3-Side Copper .................................................................................. TPS62690/1/2/3EVM Bottom-Side Copper (Bottom View) .......................................................... SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 5 6 7 7 8 9 9 10 11 11 12 12 1 Introduction www.ti.com List of Tables 1 1 Ordering Information for TPS62690/1/2/3EVM.......................................................................... 2 2 Bill of Material for the TPS62690/1/2/3EVM ........................................................................... 13 3 Marking Information ....................................................................................................... 13 Introduction The TPS6269x devices are a series of high-frequency, synchronous, step-down dc-dc converters optimized for battery-powered portable applications. Intended for low-power applications, the TPS6269x can support up to 600-mA load current and allows the use of low-cost chip inductors and capacitors. The TPS62691 and TPS62690 have fixed output voltages of 2.2 V and 2.85 V respectively. The TPS6269x operates at a regulated 4-MHz switching frequency and enters a power-save mode operation under light load currents in order to maintain high efficiency over the entire load-current range. A PFM mode extends the battery life by reducing the quiescent current to 19 μA (typical) during light load operation. 1.1 Features • • • • • • • 1.2 Applications • • • • 1.3 Input voltage range 2.3 V to 4.8 V Fixed output voltage Up to a 600-mA output current for TPS62691 and 500 mA for the TPS62690 – 4-MHz regulated frequency operation Up to an 800-mA output current for TPS62692 and 500 mA for the TPS62690 – 3-MHz regulated frequency operation Total solution size is less than 12 mm2 Very low quiescent current of 19 µA High efficiency Cell phones, smartphones LDO replacement Portable audio, portable media DC/DC micro-modules EVM Ordering Options Table 1 provides the ordering information for TPS62690/1/2/3EVM-076: Table 1. Ordering Information for TPS62690/1/2/3EVM Orderable EVM Number 2 Device Part Number Output Voltage Maximum Output Current TPS62690EVM-076 TPS62690 2.85 V 500 mA TPS62691EVM-076 TPS62691 2.2 V 600 mA TPS62692EVM-076 TPS62692 2.85 V 800 mA TPS62693EVM-076 TPS62693 2.2 V 800 mA TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS62690/1/2/3EVM Schematic www.ti.com 2 TPS62690/1/2/3EVM Schematic J4 J5 PSM MODE PWM Input R1 49.9 2 J1 C1 S+ 1 S- 2 150uF + C2 LP1 R2 49.9 U1 TPS6269x 2 1 VIN 2.3 - 4.8V Output JP2 A2 VIN B2 EN C2 GND MODE A1 SW B1 FB C1 L1 VOUT JP3 2 Vout 2.85V, 600mA max 1 1uH 4.7uF J6 C3 10uF 2 S+ 1 J2 SJ7 ON ENABLE OFF JP1 1 GND 2 Additional Caps to test on higher output capacitance 2 GND 1 J3 VOUT 1 Not installed 2 See BOM for part usage J8 C4 1 C5 C6 C7 1 1 1 Figure 1. TPS6269xEVM Schematic 3 Connector and Test Point Descriptions 3.1 Input/Output Connectors: TPS6269xEVM 3.1.1 J1 – VIN This header is the positive connection to the input power supply. The power supply must be connected between J1 (VIN) and J3 (GND). The leads to the input supply must be twisted and kept as short as possible. The input voltage must be between 2.3 V and 4.8 V. 3.1.2 J2 – S+/S– J2 S+/S– are the sense connections for the input of the converter. Connect a voltmeter, sense connection of a power supply, or oscilloscope to this header. 3.1.3 J3 – GND This header is the return connection to the input power supply. Connect the power supply between J3 (GND) and J1 (VIN). The leads to the input supply must be twisted and kept as short as possible. 3.1.4 J4 This SMA connector is connected to the input voltage of the dc/dc converter. It can be used to easily analyze the noise spectrum of the input voltage with a spectrum analyzer. 3.1.5 J5 This SMA connector is connected to the output voltage of the DC/DC converter. It can be used to easily analyze the noise spectrum of the output voltage with a spectrum analyzer. 3.1.6 J6 This header is the positive output of the step-down converter. The output voltage of the TPS62691 and TPS62690 devices are fixed to 2.2 V and 2.85 V respectively. SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 3 Connector and Test Point Descriptions 3.1.7 www.ti.com J7 J7 S+/S– are the sense connections for the output of the converter. Connect a voltmeter, sense connection of an electronic load, or oscilloscope to this header. 3.1.8 J8 J8 is the return connection of the converter. A load can be connected between J8 and J6 (VOUT). 3.2 3.2.1 Jumpers and Switches JP1 – ENABLE This jumper enables/disables the converter on the EVM. Placing a shorting jumper between ENABLE and ON turns on the converter. Placing a shorting jumper between ENABLE and OFF disables the converter. 3.2.2 JP2 – MODE This jumper enables/disables the power-saving mode under light loads. Placing a shorting jumper between MODE and PWM disables the power-saving mode. If the power-save mode is disabled, the converter operates in forced PWM mode over the entire load current range. Placing a shorting jumper between MODE and PSM enables the power-saving mode. This causes the device to operate in power-saving mode under light loads and in PWM mode in heavy loads. See the specific device data sheet for detailed information. 3.2.3 JP3 and LP1 This is the inductor current loop. In order to measure the inductor current, the trace on JP3 needs to be cut and a wire needs to be placed between the two ends of LP1. If the loop is no longer needed, remove the wire on LP1 and shorting JP3. The trace on JP3 is closed and LP1 is left open. The trace on JP3 is cut and a wire is installed on LP1. Figure 2. JP3 and LP1 Set Up 4 TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Test Configurations www.ti.com 4 Test Configurations 4.1 Hardware Setup Figure 3 illustrates a typical hardware test configuration. Oscilloscope DC Power Supply + - J1 VIN J2 S+ S- J3 GND VOUT TPS6269xEVM EN ON OFF J6 S+ S- J7 GND J8 Load MODE PWM PSM JP1 JP2 Figure 3. Hardware Board Connection 4.2 Procedure Follow these procedures when configuring the EVM for testing. CAUTION Many of the components on the TPS62690EVM-076 and TPS62691EVM-076 are susceptible to damage by electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling the EVM, Including the use of a grounded wrist strap, bootstraps, or mats at an approved ESD workstation. An electrostatic smock and safety glasses should also be worn. 1. Work at an ESD workstation. Make sure that any wrist straps, bootstraps, or mats are connected and secure the user to earth ground before power is applied to the EVM. Electrostatic smock and safety glasses should also be worn. 2. Connect a dc power supply between J1 and J3 on the TPS62690/1/2/3EVM. Note that the input voltage must range from 2.3 V to 4.8 V. Keep the wires from the input power supply to the EVM twisted and as short as possible. 3. Connect a dc voltmeter or oscilloscope to the output sense connection of the EVM. 4. A load can be connected between J6 and J8 on the TPS62690/1/2/3EVM. 5. To enable the converter, connect the shorting jumper on JP1 between ENABLE and ON located on the TPS62690/1/2/3EVM. 6. Use jumper JP2 to switch the TPS62690/1/2/3EVM between power-save mode under light loads and forced PWM mode. SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 5 TPS62691EVM Test Data 5 www.ti.com TPS62691EVM Test Data Figure 4 through Figure 9 present typical performance graphs for the TPS62690/1/2/3EVM. Actual performance data can be affected by measurement techniques and environmental variables; therefore, these curves are presented for reference and may differ from actual results obtained by some users. 5.1 Efficiency Figure 4 shows the typical efficiency performance for the TPS62691EVM. 100 90 80 VI = 2.7 V PFM/PWM Operation Efficiency - % 70 VI = 3.2 V PFM/PWM Operation 60 50 VI = 3.6 V PFM/PWM Operation 40 30 VI = 4.2 V PFM/PWM Operation 20 10 VO = 2.2 V 0 0.1 1 10 100 IO - Load Current - mA 1000 Figure 4. Efficiency vs Load current for the TPS62691 6 TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS62691EVM Test Data www.ti.com 5.2 Start-up Figure 5 and Figure 6 show the typical start-up performance for different loads for the TPS62691EVM board. EN VOUT I ind t - Time - 50 ms/div Figure 5. TPS62691 Start-Up Using EN With No Load, Vin = 3.6 V and Vout = 2.2 V EN VOUT I ind t - Time - 50 ms/div Figure 6. TPS62691 Start-up Using EN With 200-mA Load, Vin = 3.6 V and Vout = 2.2 V SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 7 TPS62691EVM Test Data 5.3 www.ti.com Output Voltage Ripple (Power-Save Mode) Figure 7 illustrates the typical output voltage ripple for the TPS62691EVM in power-save mode. Load Current = 40 mA Power Save Mode Mode = Low VOUT SW I ind t - Time - 500 ns/div Figure 7. Power-Save Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA 8 TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS62691EVM Test Data www.ti.com 5.4 Output Voltage Ripple (PWM) Figure 8 and Figure 9 illustrate a typical output voltage ripple for the TPS62691 in PWM mode Load Current = 40 mA PWM Mode Mode = High VOUT SW I ind t - Time - 200 ns/div Figure 8. PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 40 mA Load Current = 200 mA PWM Mode Mode = High VOUT SW I ind t - Time - 200 ns/div Figure 9. PWM Mode Ripple at Vin = 3.6 V and Vout = 2.2 V With Iload = 200 mA SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 9 TPS62690/1/2/3EVM Assembly Drawing and Layout 6 www.ti.com TPS62690/1/2/3EVM Assembly Drawing and Layout Figure 10 through Figure 14 show the design of the TPS62690/1/2/3EVM-076 printed-circuit boards (PCB). The EVM has been designed using a two-layer, 1-ounce copper-clad PCB with all components in an active area on the top side of the board. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space-constrained systems. NOTE: Board layouts are not to scale. These figures show how the board is laid out; they are not intended to be used for manufacturing TPS62690/1/2/3EVM-076 PCBs. Note the connection of the TPS6269x feedback (FB) pin. It is recommended that the FB pin be connected directly to the inductor, not directly on the VOUT connection of the output capacitor. The connection to the inductor provides better transient response performance. Figure 10. TPS62690/1/2/3EVM Component Placement (Top View) 10 TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS62690/1/2/3EVM Assembly Drawing and Layout www.ti.com Figure 11. TPS62690/1/2/3EVM Top-Side Copper (Top View) Figure 12. TPS62690/1/2/3EVM L2-Side Copper SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 11 TPS62690/1/2/3EVM Assembly Drawing and Layout www.ti.com Figure 13. TPS62690/1/2/3EVM L3-Side Copper Figure 14. TPS62690/1/2/3EVM Bottom-Side Copper (Bottom View) 12 TPS6269xEVM-076 Evaluation Module SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS62690/1/2/3EVM Bill of Material www.ti.com 7 TPS62690/1/2/3EVM Bill of Material Table 2 lists the bill of materials for the TPS6269xEVM. Table 2. Bill of Material for the TPS62690/1/2/3EVM TPS62690 TPS62691 TPS62692 TPS62693 Qty Qty Qty Qty RefDes Value Size Description Part Number 1 1 1 1 C2 (1) 4.7 µF 402 Capacitor, Ceramic, 6.3 V, X5R, 20% GRM155R60J475M 1 1 1 1 C3 (1) 10 µF 603 Capacitor, Ceramic, 6.3 V, X5R, 20% GRM188R60J106ME84 4 4 4 4 C4, C5, C7, C8 Open 603 Capacitor, Ceramic STD 1 1 1 1 C1 150 µF 0.110 x 0.215 in Capacitor, Tantalum Poly, 6.3 V, 70 mΩ, 20% T520B157M006ATE070 1 1 1 1 L1 (1) 1 µH 2012 Inductor, SMT, 0.9 A, 180 mΩ MDT2012-CH1R0A 2 2 2 2 R1, R2 49.9 Ω 402 Resistor, Chip, 1/16 W, 1% STD 1 0 0 0 U1 TPS62690YFF WCSP-6 IC, 2.85-V, 500-mA, 4-MHz Synchronous Step-Down Converter TPS62690YFF 0 1 0 0 U1 TPS62691YFF WCSP-6 IC, 2.2-V, 600-mA, 4-MHz Synchronous Step-Down Converter TPS62691YFF 0 0 1 0 U1 TPS62692YFF WCSP-6 IC, 2.85-V, 800-mA, 3-MHz Synchronous Step-Down Converter TPS62692YFF 0 0 0 1 U1 TPS62693YFF WCSP-6 IC, 2.2-V, 800-mA, 3-MHz Synchronous Step-Down Converter TPS62693YFF (1) 8 These are recommended but can be replaced with specified parts listed in the datasheet. Marking Information for this EVM Table 3. Marking Information Assembly Number Marking Text PWR076-001 TPS62690EVM-076 PWR076-002 TPS62691EVM-076 PWR076-003 TPS62692EVM-076 PWR076-004 TPS62693EVM-076 SLVU529A – September 2011 – Revised November 2011 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated TPS6269xEVM-076 Evaluation Module 13 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. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning 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. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of 2.3 V to 4.8 V and the output voltage range of fixed 2.2 V ('691) to fixed 2.85 V ('690) . Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there 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 designed to operate properly with certain components above 60° C as long as the input and output ranges are maintained. These components 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. 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