LM3279EVM

Using the LM3279 Evaluation Board User's Guide Literature Number: SNOU093 MARCH 2013 All trademarks are the property of their respective owners. User's Guide SNOU093 – MARCH 2013 LM3279 Evaluation Board 1 Introduction The LM3279 evaluation board is a working demonstration of a buck-boost DC-DC converter designed to generate output voltages above or below a given input voltage particularly suitable for cell-phone applications powering 3G/4G Power Amplifiers, as well as other portable devices. For more details and electrical characteristics about the converter operation, please refer to the LM3279 datasheet. If you are considering using the LM3279 in a system design, please see the “PCB Layout Considerations” section of the device data sheet. 2 Operating Conditions The board will operate under the following conditions: • VIN range: 2.7V ≤ VIN ≤ 5.5V • Adjustable VOUT – RFFE Digital Control: 0.4V to 4.2V – Analog Control: 0.6V to 4.2V • VCON range: 0.2V to 1.4V • VOUT equation: VOUT = 3 x VCON • IOUT range: 1A Max. for VBATT ≥ 3.2V 3 Package The LM3279 is available in an 16-bump lead-free DSBGA package. 2 LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Typical Application Circuits www.ti.com 4 Typical Application Circuits Figure 1. RFFE Digital Circuit L1 1.5 ÛH SW1 SW2 VBATT: 2.7V to 5.5V VOUT: 0.4V to 4.2V PVIN C2 220 pF X C1 1 nF VOUT C6 220 pF SVIN C5 1 nF FB LM3279 VCON C7 10 ÛF VIO GPO0 C9 0.47 ÛF RF PA EN C3 10 ÛF C8 0.47 ÛF SDATA GPO1 SCLK SGND DGND PGND RF GND BB or RFIC RF Control Bits Note: C1, C2, C5 and C6 are optional. Figure 2. Analog Circuit L1 1.5ÛH VBATT: 2.7V to 5.5V SW1 SW2 VOUT: 0.6V to 4.2V PVIN C2 1nF 220pF X C1 VOUT SVIN C6 C5 220pF 1nF FB LM3279 VCON C8 C9 0.47ÛF 0.47ÛF RF PA EN C3 C7 VIO 10ÛF 10ÛF GPO0 SDATA GPO1 SCLK DGND SGND PGND RF GND BB or RFIC DAC Note: C1, C2, C5 and C6 are optional. SNOU093 – MARCH 2013 Submit Documentation Feedback LM3279 Evaluation Board Copyright © 2013, Texas Instruments Incorporated 3 Bill of Materials for LM3279 Evaluation Board 5 www.ti.com Bill of Materials for LM3279 Evaluation Board Table 1. LM3279 BOM Designator Description C3 CIN C7 COUT L1 Inductor Value 10 µF 1.5 µH Part Number Manufacturer CL05106MQ5NUNC Samsung DFE201610C1R0M TOKO Table 2. Optional High-Frequency and PA Decoupling Capacitors Designator Description Value Part Number C1/C5 High. Freq. Input Cap. 1nF GRM022R60J102KE19 C2 CIN C6 COUT 220 pF C8 C9 0.47 µF GRM022R71A221KA01 Murata GRM033R60J474MA01 Emulates PA decoupling input capacitor C10 R1 6 Manufacturer — — — Not populated RFFE Communication The LM3279 Evaluation Board is designed to connect to the LM8335 EVM. Configuration and control of the LM3279 is performed using the LM3279 Evaluation GUI Software provided on the included CD ROM. Refer to Appendix A: Software User Manual for the LM3279 Evaluation GUI Software installation instructions. 7 Evaluation Board Layout Figure 3. Photo of LM3279 Evaluation Board 4 LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Evaluation Board Layout www.ti.com Figure 4. LM8335 RFFE Interface Evaluation Module 7.1 CONNECTIONS 1. VIN is connected to the red (PVIN) and black (PGND1) banana connector pins. 2. The load (RL or PA) is connected to the yellow (VOUT1) and black (PGND2) Output banana connector pins. 3. Connect PC USB Port to the LM8335 “J1” using a micro-USB Type “B” Cable. • (Note: The LM8335 EVM is powered by the PC thru the USB cable.) 4. Connect the 4 wire Pin RFFE Interface Cable from LM8335 “J2” to LM3279 Eval Board “J4” and align SDATA, SCLK, VIO and GND for Digital Implementation. • (Note: Left side of “J4” connector configures the part into an Analog state and the right side for the connector configures the device into Digital implementation.) 5. Refer to Analog and Digital implementation description for the LM3279 below in the Startup Sequence section. SNOU093 – MARCH 2013 Submit Documentation Feedback LM3279 Evaluation Board Copyright © 2013, Texas Instruments Incorporated 5 Evaluation Board Layout 7.2 www.ti.com LM3279 Schematic Figure 5. LM3279 PCB Schematic 6 LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated LM3279 PCB Layout and Layers www.ti.com 8 LM3279 PCB Layout and Layers Figure 6. Top Layer 1 Figure 8. Mid-Layer 2 Figure 7. Mid-Layer 1 Figure 9. Bottom Layer SNOU093 – MARCH 2013 Submit Documentation Feedback LM3279 Evaluation Board Copyright © 2013, Texas Instruments Incorporated 7 Programmable Registers 9 www.ti.com Programmable Registers ADDRESS REGISTER CONTENTS 00h VSET_CTRL Bits Name 7 Reserved 6:0 VSET_CTRL[6:0] 01h Description Reserved bit. Default = 0. DCDC voltage control bits. VSET_CTRL=00h puts the part into a low power mode. VSET_CTRL = 02h puts the part in a standby mode. VSET_CTRL = 0Bh corresponds to 0.4V and 75h corresponds to 4.212V. STATE_CTRL Bits Name 7:6 STATE_CTRL[1:0] 5:0 Reserved Bits Name 7 GPO0 GPO0 control bit. 0b = Output set to low level (default) 1b = Output set to high level 6 GPO1 GPO1 control bit. 0b = Output set to low level (default) 1b = Output set to high level Bits Name 02h Description PWM PFM state control bits. 00b = Force PFM 01b = PWM if VOUT < 1.5 (default) 10b = PWM if VOUT < 2.1 and IOUT < 100 mA 11b = Force PWM GPO_CTRL 03h-1Bh Description RESERVED Description Reserved registers for configuration, test and trim. 1Ch 8 PM_TRIG Bits Name 7:6 PWR_MODE[1:0] 5:0 TRIG_REG[5:0] Description Power Mode Bits. 00b = normal operation 01b = default settings 10b = low power 11b = reserved Reserved for trigger bits. LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Connection Diagram www.ti.com 1Dh PRODUCT_ID Bits Name 7:0 PRODUCT_ID[7:0] Description Bits Name 7:0 MANUFACTURER_ID[7:0] Bits Name 7:6 SPARE[1:0] 5:4 MANUFACTURER_ID[5:4] 3:0 USID[3:0] 1Eh MANUFACTURER_ID Description 1Fh 10 Product identification bits. Set to A0h. Manufacturer Identification bits 7:0 1Eh are LSB for TI. USID Description This is a read-only register that is reserved and yields a value of 00b at readback. Potentially used in future for extending manufacturer ID field. Manufacturer identification bits 5:4 01h are MSB for TI. Unique Slave Identifier default 0101b. Connection Diagram A1 A2 A3 A4 A4 A3 A2 A1 B1 B2 B3 B4 B4 B3 B2 B1 C1 C2 C3 C4 C4 C3 C2 C1 D1 D2 D3 D4 D4 D3 D2 D1 Top View Bottom View SNOU093 – MARCH 2013 Submit Documentation Feedback LM3279 Evaluation Board Copyright © 2013, Texas Instruments Incorporated 9 Pin Descriptions 11 10 www.ti.com Pin Descriptions Pin # Name Description A1 SCLK Digital control interface (DCON) RFFE Bus clock input. Typically connected to RFFE master on RF or Baseband IC. SCLK must be held low when VIO is not applied. B1 SDATA Digital control interface (DCON) RFFE Bus data input/output. Typically connected to RFFE master on RF or Baseband IC. SDATA must be held low when VIO is not applied. C1 VIO D1 DGND Digital Ground. A2 GPO0 Multipurpose GPIO. When VIO = HIGH, GPO0 is a general purpose output for configuring RF front end circuitry. When the GPO0 control bit in Register 02 is set to 1, the output is driven to a 1.8V (VIO) high logic level , and the output is pulled to a low logic level when the GPO0 control bit is set to 0. When EN = HIGH, R0 input Gain-state control pin of RF PA (input has an internal pullup resistor). B2 VCON Voltage Control Analog input. When EN = HIGH, VCON controls the output voltage in PWM and PFM modes. When in digital control, VCON can be left as no connect or conneted to system ground. C2 FB Feedback input to inverting input of error amplifier. Connect output voltage directly to this node at load point. D2 VOUT Regulated output voltage of LM3279. Connect this to a 10 µF ceramic output filter capacitor to GND. A3 GPO1 Multipurpose GPIO. When VIO = HIGH, GPO1 is a general purpose output for configuring RF front end circuitry. When the GPO1 control bit in Register 02 is set to 1, the output is driven to a 1.8V (VIO) high logic level, and the output is pulled to a low logic level when the GPO1 control bit is set to 0. When EN = HIGH, R1 input Gain-state control pin of RF PA (input has an internal pullup resistor). B3 EN C3 SGND D3 SW2 Switch pin for Internal Power Switches M3 and M4. Connect inductor between SW1 and SW2. A4 SVIN SVIN is no connect. Analog supply is internally connected to PVIN. B4 PVIN Power MOSFET input and power current input pin. Typically connected to VBATT. Optional low-pass filtering may help buck and buck-boost modes for radiated EMI and noise reduction. C4 SW1 Switch pin for Internal Power Switches M1 and M2. Connect inductor between SW1 and SW2. D4 PGND Digital control interface (DCON) 1.8V supply input. VIO functions as the RFFE interface reference voltage. VIO also functions as reset and enable input to LM3279. Bypass capacitor should be connected between VIO and GND. Typically connected to voltage regulator controlled by RF or Baseband IC. When VIO = HIGH, EN shall be connected to GND. Enable Pin. Pulling this pin higher than 1.2V enables part to function in analog control mode. VIO must be tied to ground. Signal Ground for analog circuits and control circuitry. Power Ground for Power MOSFETs and gate drive circuitry. LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Appendix A: Software User Manual www.ti.com 12 Appendix A: Software User Manual 12.1 INTRODUCTION This manual instructs a user how to set up and begin operating the LM8335 board, which is a RFFE interface allowing communication to the LM3279 eval board from a PC. 12.2 GENERAL INFORMATION “The RF Front-End Control Interface (later referred to as RFFE) was developed to offer a common and widespread method for controlling RF front-end devices. There are a variety of front-end devices, including Power Amplifiers (PA), Low-Noise Amplifiers (LNA), filters, switches, power management modules, antenna tuners and sensors. These functions may be located either in separate devices or integrated into a single device, depending on the application.” -MIPI ® Alliance Specification for RFFE This allows users to be able to control more than one device using a master and multiple slaves. 12.3 ITEMS NEEDED: 1. LM8335 Evaluation Board (https://estore.ti.com/LM8335EVM-General-Purpose-Output-Expander-with-MIPI-RFFE-Host-InterfaceEvaluation-Module-P4279.aspx); 2. LM3279 evaluation board; 3. Micro USB “B” cable; 4. PC with USB port available; 5. GUI executable program (download from the web); and 6. 4-wire cable to connect from the LM8335 board to LM3279 board. 12.4 GUI INTERFACE EXECUTABLE AND DOWNLOAD 1. Run the GUI interface executable and download onto computer. • Note: Microsoft .NET Framework software is required and must be downloaded from Microsoft. 12.5 STARTUP SEQUENCE 1. For Digital Control: Place the EN pin of the LM3279 “Low” from the 20 pin connector “J4”, and leave the GPO0(R1)/1(R0) pins floating. Connect and align the SDATA, SCLK, VIO, and GND pins together from the LM8335 board (refer to Figure 3 and Figure 4). 2. Power up VIN (within the VIN range of 2.7V to 5.5V). 3. Start the LM3279 GUI Software. 4. A window will appear (Figure 10); click “OPEN” to establish connectivity between the LM3279 standalone eval board and the LM8335 board. 5. Another window will appear Figure 11 with the programmable registers of the LM3279. 6. Click “VIO_On” to enable the device. Make sure that VIO=1.8V on the LM3279EVM on VIO header. 7. Configure the Output voltage, Mode, and mode of operation for LM3279 to desired configuration (refer to Figure 11). 8. For Analog Control: Place 0Ω resistors to R3, R4 and R5 making SDATA, SCLK, VIO forced “Low.” 9. Power up VIN (within the VIN range of 2.7V to 5.5V). 10. Set VCON pin voltage to desired voltage (0.2 to 1.4V) 11. Set EN, R0 (GPO1) and R1 (GPO0) to the desired logic levels, then VOUT should present as expected. SNOU093 – MARCH 2013 Submit Documentation Feedback LM3279 Evaluation Board Copyright © 2013, Texas Instruments Incorporated 11 Appendix A: Software User Manual www.ti.com 12.6 GUI - SOFTWARE CONFIGURATION Figure 10. Startup Window for Initializing GUI Figure 11. Programming GUI Window 12 LM3279 Evaluation Board SNOU093 – MARCH 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: 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. 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 LIMITED 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. 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. 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 visit www.ti.com/esh or contact TI. 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. 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. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module 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 or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment 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. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 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Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. 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Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. 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