TPS22946EVM-499

User's Guide SLVU832 – February 2013 Using the TPS22946EVM-499 Single Channel Load Switch IC This user’s guide describes the functionality of the TPS22946 evaluation module (EVM). The guide will show how to make the connections to the EVM and demonstrate the features of the TPS22946 load switch. It contains the following; schematic and layout drawings, bill of materials, setup and testing instructions. Table 1. TPS22946 Feature List 1 2 3 4 5 6 7 8 EVM Ron at 5.5V Typical Current Limit Integrated Inrush Current Timeout Current Limit Blanking Time Auto restart Time Over Current Timeout Enable HPA499 300 mW 30 mA, 70 mA or 155 mA Yes 10mS 70mS 6S Active High Contents Description ................................................................................................................... 1.1 Typical Applications ................................................................................................ Electrical Performance ..................................................................................................... Operation ..................................................................................................................... 3.1 Equipment ........................................................................................................... 3.2 Setup ................................................................................................................ Operation ..................................................................................................................... Test Configurations ......................................................................................................... 5.1 On State Resistance (rON) Test Setup ......................................................................... 5.2 Slew Rate Test Setup ............................................................................................. 5.3 VOUT Slew Rate Example ........................................................................................ Layout ........................................................................................................................ Schematic .................................................................................................................... Bill of Materials .............................................................................................................. 2 2 2 2 2 2 3 3 3 4 6 8 9 9 List of Figures 1 2 3 4 5 6 ..................................................................................................................... Slew Rate Setup ............................................................................................................ TPS22946 TRISE Example ................................................................................................ TPS22946 TFALL Example ............................................................................................... Top Side ...................................................................................................................... Bottom Side .................................................................................................................. rON Setup 4 5 6 7 8 8 List of Tables 1 TPS22946 Feature List ..................................................................................................... 1 2 Bill of Materials .............................................................................................................. 9 SLVU832 – February 2013 Submit Documentation Feedback Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated 1 Description 1 www.ti.com Description The device contains a 300-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22946 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch. When the switch current reaches the maximum limit, the TPS22946 operates in a constant-current mode to prohibit excessive currents from causing damage. The current limit can be selected using the CL input: a high CL input sets the current limit to 155 mA, a low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA. If the constant current condition still persists after 10ms, the switch is turned off and the fault signal pin (OC) is pulled low. The TPS22946 has an auto-restart feature which turns the switch on again after 70 ms if the ON pin is still active. If the TPS22946 remains in an over-current condition for 5 seconds, the device shuts off until it is turned back on by setting the ON control signal off and then on again. If the device is used to protect an LDO, the inrush current required by the LDO at startup can, in some cases, exceed the current limit and initiate a blanking (current limiting) condition. TPS22946 provides allowance for this scenario during startup of the LDO by temporarily increasing the current limit to 435-mA 8-ms after the load switch is enabled. 1.1 Typical Applications • • • • • 2 Portable Consumer Electronics Mobile Phones Portable Media Players Smart Phones / Tablets GPS Devices Electrical Performance Refer to the Datasheet document SLVS984 for a detailed listing of the electrical performance specifications. 3 Operation 3.1 Equipment • • • • • 3.2 Voltage sources: – DC supply will be used. • DC Supply capable of minimum of 10V, 5A. Multi Meter: – Multi Meter for measuring switch voltage drop and VOUT voltage. Output Load: – Variable load connected to VOUT, observe power rating. Oscilloscope: – 4 channel 100MHz Recommended Wire Gauge: 18 AWG Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the EVM. 3.2.1 J1/J3 – Input Connections This is the connection for the leads from the input source. Connect the positive lead to VIN J1, and the negative lead connection to GND J3. 2 Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated SLVU832 – February 2013 Submit Documentation Feedback Operation www.ti.com 3.2.2 J4/J6 – Output Connections This is the connection for the output of the EVM. Connect the positive connection of the load to VOUT J4, and the negative connection to GND J6. 3.2.3 JP3 - ON This is the enable input for the device. A shorting jumper must be installed on JP3 in either the High or Low Position. The TPS22946 is active High. ON must not be left floating. An external enable source can be applied to the EVM by removing the shunt and connecting a signal to the center pin of J3. Refer to the datasheet for proper ON and OFF voltage level settings. A switching signal may also be used and connected at this point. 3.2.4 JP4 – CL This is the current limit select pin for the device. A high CL input sets the current limit to 155mA, a low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA. 3.2.5 J2/J5 - VIN Sense and VOUT Sense These two connections are used when very accurate measurements of the input or output voltage are required. rON measurements should be made using these sense connections when measuring the voltage drop from VIN to VOUT and then calculating the resistance. 3.2.6 JP1/JP2 – Input Capacitors During normal operation a shorting jumper is placed on JP2 and connects C2 capacitor from the input of the device to ground. JP1 and C1 may be used to connect a user selected capacitor value from the input of the device to ground. 3.2.7 JP5/JP6 – Output Capacitors During normal operation a shorting jumper is placed on JP6 and connects C4 capacitor from the output of the device to ground. JP5 and C3 may be used to connect a user selected capacitor value from the output of the device to ground. 3.2.8 JP7 – Output Resistor During normal operation no shorting jumper is placed on JP7. A shorting jumper may be used on JP7 to connect R1 load resistor from the output of the device to ground. R1 is sized for 2010 3/4W power rated resistor. 4 Operation Connect the positive input of the power supply to VIN at J1 and the negative lead of the power supply to GND at J3. The input voltage range of the TPS22946EVM-499 is 1.62V to 5.5V. Output loads can be applied by connecting between J4 VOUT and J6 GND. The TPS22946EVM-499 is rated for a maximum continuous current of 200mA. Configure JP3 as required. JP3 must be installed for proper operation. When the ON pin is asserted the TPS22946 device will control the slew rate of VOUT. The slew rate of the device is internally controlled to avoid inrush current. 5 Test Configurations 5.1 On State Resistance (rON) Test Setup Figure 1 shows a typical setup for measuring On State Resistance. The voltage drop across the switch is measured using the sense connections then divided by the current into the load yielding the rON resistance. SLVU832 – February 2013 Submit Documentation Feedback Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated 3 Test Configurations www.ti.com Figure 1. rON Setup 5.2 Slew Rate Test Setup Figure 2 shows a test setup for measuring the Slew Rate of the Load Switch. Controlling the ON pin of the switch with a signal source and then measuring the output with a scope shows the switches ability to avoid inrush current. 4 Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated SLVU832 – February 2013 Submit Documentation Feedback Test Configurations www.ti.com Figure 2. Slew Rate Setup SLVU832 – February 2013 Submit Documentation Feedback Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated 5 Test Configurations 5.3 www.ti.com VOUT Slew Rate Example Figure 3. TPS22946 TRISE Example 6 Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated SLVU832 – February 2013 Submit Documentation Feedback Test Configurations www.ti.com Figure 4. TPS22946 TFALL Example SLVU832 – February 2013 Submit Documentation Feedback Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated 7 Layout 6 www.ti.com Layout Figure 5. Top Side Figure 6. Bottom Side 8 Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated SLVU832 – February 2013 Submit Documentation Feedback Schematic www.ti.com 7 Schematic 8 Bill of Materials Table 2. Bill of Materials (1) (2) (3) (4) COUNT 1 (1) (2) (3) (4) RefDes Value Description SIZE PCB, 0.9 In x 1.7 In x 0.062 In -- Part Number MFR HPA499 Any 0 C1 OPEN Capacitor, Ceramic 603 Std Std 2 C2, C4 1uF Capacitor, Ceramic, 10-V, X5R,20% 603 Std Std 1 C3 0.1uF Capacitor, Ceramic, 16-V, X7R,10% 603 Std Std 1 R2 49.9 Resistor, Chip 3/4W 5% 2010 Std Std 1 R1 10K Resistor, Chip 1/8W 5% 805 Std Std 11 J1-J6,JP1-2,JP5-7 PEC02SAAN Header,2pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins 2 JP3, JP4 PEC03SAAN Header,3pin, 100mil spacing 0.100 inch x 3 PEC03SAAN Sullins 0.125 x 0.125 inch 5012 Keystone 2 TP2, TP3 5012 Test Point, White, Thru Hole Compact Style 1 U1 TPS22946YZ P IC, Single Chip,Current-Limited Load Switch with Controlled Turn On YZP TPS22946YZP TI 4 NA NA Shunt, 100-mil, Black 0.100 929950-00 3M These assemblies are ESD sensitive, ESD precautions shall be observed. These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable. These assemblies must comply with workmanship standards IPC-A-610 Class 2. Ref designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent MFG's components. SLVU832 – February 2013 Submit Documentation Feedback Using the TPS22946EVM-499 Single Channel Load Switch IC Copyright © 2013, Texas Instruments Incorporated 9 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. 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. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【ご使用にあたっての注】 本開発キットは技術基準適合証明を受けておりません。 本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 2. 3. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。 実験局の免許を取得後ご使用いただく。 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 　　　上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・インスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. 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. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. 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 as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use these EVMs. Agreement to Defend, Indemnify and Hold Harmless. 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