TPS22924CEVM-532

User's Guide SLVU456B – May 2011 – Revised May 2013 TPS22924EVM-532 This user's guide describes the characteristics, operation, and use of the TPS22924EVM-532 evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS22924 load switch with controlled turn on. The input voltage range of the TPS22924 is 0.75 V to 3.6 V. An integrated charge pump biases the NMOS switch to achieve a minimum switch ON resistance. The switch is controlled by an on/off input (EN), which is capable of interfacing directly with low-voltage control signals. This user's guide includes setup instructions, schematic diagram, bill of materials, and printed-circuit board layout drawings for the EVM. 1 Introduction The TPS22924EVM-532 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS22924 load switch. The board features the small 6-pin CSP package for a small solution size. Table 1. TPS22924 VOUT Rise Time Options EVM 1.1 Device Rise Time (µs) Typical VIN (V) Max. Continuous Current Enable (ON Pin) Quick Output Discharge HPA532-001 TPS22924B 100 3.6 2-A Active High Yes HPA532-002 TPS22924C 840 3.6 2-A Active High Yes HPA532-003 TPS22924D 6200 3.6 2-A Active High Yes Related Documentation From Texas Instruments TPS22924, ULTRA-SMALL, LOW-INPUT-VOLTAGE, LOW rON LOAD SWITCH data sheets (SLVSA52, SLVSAR3, SLVSBT4) 2 Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the TPS22924EVM-532. 2.1 J1/J3 – Input Connections This is the connection for the leads from the input source. Connect the positive connection to the VIN J1 and the negative connection to the GND J3. 2.2 J4/J6 – Output Connections This is the connection for the output of the TPS22924EVM. Connect the positive connection of the load to the VOUT J4 and the negative connection to the GND J6. SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback TPS22924EVM-532 Copyright © 2011–2013, Texas Instruments Incorporated 1 Operation 2.3 www.ti.com JP3 – EN This is the enable input for the device. Place a shorting jumper across the HI and EN pins of JP3 to enable the integrated circuit (IC). Place a shorting jumper across the LO and EN pins of JP3 to disable the IC. A shorting jumper must be installed on JP3 in either the ON or OFF positions, and EN must not be left unconnected. An external enable source can be applied to the TPS22924 by removing the shunt and connecting a signal to the center pin of JP3. EN ≥ 0.75V is required for the ACTIVE or ON state of the device. A switching signal may also be used and connected at this point. 2.4 J2/J5 – VIN Sense and VOUT Sense These two connectors are used when very accurate measurements of input or output voltage are required, Ron measurements should be made using these sense connections and measuring the voltage drop from VIN to VOUT and then calculating the resistance. 3 Operation Connect the positive input of the power supply to the VIN J1 and the negative lead of the power supply to GND J3. The input voltage range of the TPS22924 is 0.75 V to 3.6 V. Output load can be applied by connecting between J4 VOUT and J6 GND. The TPS22924 is rated for a maximum continuous current of 2A. Additional output load can be selected using JP6, JP7, and JP8. Shorting across JP6 selects R1 an 36 ohm on board resistor. JP7 selects R2 an 11 ohm on board resistor. JP8 selects R3 which is open for customer selection. R1, 2 and 3 are intended for light loads of the output, observe the 1/8W power rating for these parts. Configure jumper JP3 as required. JP3 must be installed for proper operation. ON is normal operation. While operating in the ON state the rise time of the device is internally controlled to avoid inrush current. Different rise times are selected by device types as shown above in Table 1. In the OFF position, the device is shut down and a 1250-Ω on-chip load resistor is added for output quick discharge. 4 Test Results See the Typical Characteristics section of the TPS22924 data sheet. 2 TPS22924EVM-532 SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Test Configurations www.ti.com 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 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. Figure 2. Slew Rate Setup 6 Board Layout, Schematic, and Bill of Materials This section provides the TPS22924EVM-532 board layout, schematic, and bill of materials. 6.1 Board Layout For best performance, all traces should be as short as possible. To be most effective, the input and output capacitors should be placed close to the device to minimize the effects that parasitic trace inductances may have on normal and short-circuit operation. Using wide traces for VIN, VOUT, and GND helps minimize the parasitic electrical effects along with minimizing the case to ambient thermal impedance Figure 3 and Figure 4 show the board layout for the TPS22924EVM-532 PCB. SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback TPS22924EVM-532 Copyright © 2011–2013, Texas Instruments Incorporated 3 Board Layout, Schematic, and Bill of Materials www.ti.com Figure 3. Top Assembly Layer Figure 4. Top Layer 4 TPS22924EVM-532 SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Board Layout, Schematic, and Bill of Materials www.ti.com 6.2 Schematic and Bill of Materials Figure 5. TPS22924EVM-532 Schematic Table 2. Bill of Materials (1) (2) (3) (4) (1) (2) (3) (4) -001 COUNT -002 COUNT -003 COUNT RefDes Value 1 1 1 -- 1 1 1 C3 0.1uF 1 1 1 C2 1uF 0 0 0 C1, C4 1 1 1 R1 1 1 1 R2 Description SIZE Part Number HPA532 Any Capacitor, Ceramic, 50-V, Y5V 603 GRM188F 51H104ZA 01D MuRata Capacitor, Ceramic, 25-V, Y5V 603 GRM188F 51E105A1 2D MuRata OPEN Capacitor, Ceramic 603 Std Std 36 Resistor, 5% 1/8W 805 ERJ6GEYJ36 0V Panasonic 11 Resistor, 5% 1/8W 805 ERJ6GEYJ11 0V Panasonic OPEN Resistor, 5% 1/8W PCB, 0.9 In x 1.7 In x 0.062 In MFR 0 0 0 R3 805 Std Std 13 13 13 J1-J6,JP12,JP4-8 PEC02SA Header,2pin, 100mil spacing AN 0.100 inch x2 PEC02SA AN Sullins 1 1 1 JP3 PEC03SA Header,3pin, 100mil spacing AN 0.100 inch x3 PEC03SA AN Sullins 1 0 0 U1 TPS22924 IC, Single Chip, Low Input Voltage Current-Limited Load BYZ Switch with Shut Off Auto-Restart YZ TPS22924 BYZ TI 0 1 0 U1 TPS22924 IC, Single Chip, Low Input Voltage Current-Limited Load CYZP Switch with Shut Off Auto-Restart YZP TPS22924 CYZP TI 0 0 1 U1 TPS22924 IC, Single Chip, Low Input Voltage Current-Limited Load DYZP Switch with Shut Off Auto-Restart YZP TPS22924 DYZP TI 1 1 1 1.25 x 0.25 inch THT-13457-10 Brady 3 3 3 0.100 929950-00 3M Label (See note 5) NA NA Shunt, 100-mil, Black 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 components. SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback TPS22924EVM-532 Copyright © 2011–2013, Texas Instruments Incorporated 5 Board Layout, Schematic, and Bill of Materials Table 3. www.ti.com Table 3. (continued) Table 3 Table 3 Assembly number Text HPA532-001 TPS22924BEVM-532 HPA532-002 TPS22924CEVM-532 HPA532-003 TPS22924DEVM-532 5.3 VOUT Rise Time and TON Response Figure 6. TPS22924B TON and Trise Example 6 TPS22924EVM-532 SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Board Layout, Schematic, and Bill of Materials www.ti.com Figure 7. TPS22924C TON and Trise Example SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback TPS22924EVM-532 Copyright © 2011–2013, Texas Instruments Incorporated 7 Board Layout, Schematic, and Bill of Materials www.ti.com Figure 8. TPS22924D TON and Trise Example 8 TPS22924EVM-532 SLVU456B – May 2011 – Revised May 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated 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. 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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 0.75 V to 3.6 V and the output voltage range of . 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 50°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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