TPS22961EVM-067

User's Guide SLVUA42A – February 2014 – Revised March 2014 Using the TPS22961EVM-067 Single Channel Load Switch IC The TPS22961EVM-067 evaluation module (EVM) allows the user to connect power to and control the 8pin SON package load switch. Parameters such as the On State resistance, Output Slew Rate and Output Discharge properties can be easily evaluated. Table 1 lists a short description of the load switch performance specifications; refer to the datasheet SLVSCI4 for more details. Table 1. TPS22961 Slew Rate, Output Current Rating, Enable, and Output Discharge Options 1 2 3 4 5 6 7 EVM Device Slew Rate Typical VIN (V) Max. Continuous Current Enable (ON Pin) Quick Output Discharge HVL067 TPS22961 5μs with VBIAS = 5V 1.05 6A Active High Yes Contents Introduction .................................................................................................................. 2 1.1 Description .......................................................................................................... 2 1.2 Features ............................................................................................................. 2 Electrical Performance ..................................................................................................... 2 Schematic .................................................................................................................... 2 Layouts ....................................................................................................................... 3 4.1 Setup ................................................................................................................ 5 Operation ..................................................................................................................... 6 Test Configuraions .......................................................................................................... 7 6.1 On-Resistance (RON) Test Setup ................................................................................. 7 6.2 Slew Rate Test Setup ............................................................................................. 7 6.3 VOUT Slew Rate Examples ...................................................................................... 9 Bill of Materials (BOM) .................................................................................................... 11 List of Figures 1 TPS22961EVM-067 Schematic .......................................................................................... 2 2 TPS22961EVM-067 Top Assembly....................................................................................... 3 3 TPS22961EVM-067 Top Layout ......................................................................................... 4 4 TPS22961EVM-067 Bottom Layout ...................................................................................... 5 5 RON Setup .................................................................................................................... Slew Rate Setup ............................................................................................................ TPS22961 Vout tR Example (VBIAS = 5V, VIN = 1.05V, RL = Open) ...................................................... TPS22961 Vout tR Example (VBIAS = 5V, VIN = 1.05V, RL = Open) .................................................... 7 6 7 8 8 9 10 List of Tables .......................... 1 TPS22961 Slew Rate, Output Current Rating, Enable, and Output Discharge Options 2 Bill of Materials............................................................................................................. SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Using the TPS22961EVM-067 Single Channel Load Switch IC Copyright © 2014, Texas Instruments Incorporated 1 11 1 Introduction 1 www.ti.com Introduction The TPS22961EVM-067 evaluation module (EVM) allows the user to connect power to and control the 8pin SON package load switch. Parameters such as the On-resistance, output rise time and output discharge resistance can be easily evaluated. Table 1 lists a short description of the load switch performance specifications; refer to the datasheet SLVSCI4 for more details. 1.1 Description The TPS22961EVM is a two sided PCB containing the TPS22961 load switch device. The VIN and VOUT connections to the device and the PCB layout routing are capable of handling high continuous currents and provide a low resistance pathway into and out of the device under test. Test point connections allow the EVM User to control the device with user defined test conditions and make accurate RON measurements. 1.2 Features • • • • • • 2 EVM allows access to the Input, Output and Control pins of the TPS22961 Load Switch Device. On board CIN and COUT capacitors. On Board Output loading resistor 10Ω. VIN input voltage range: 0.8V to 3.0V. VBIAS voltage range: 3.0 to 5.5V 6A max continuous current. Electrical Performance Refer to the datasheet SLVSCI4 for detailed electrical characteristics of the TPS22961. 3 Schematic TP1 VIN TP2 TP3 VIN SENSE VOUT SENSE VIN TP4 U1 J1 VIN + 0.8V - 3.0V - 1 1 2 2 C1 1µF JP1 TP5 3 VBIAS 3.0V-5.5V AGND 4 PAD VIN VOUT VIN VOUT VBIAS VOUT ON GND 8 LQM21PN2R2MC0D 2.2µH 7 C2 22µF 6 C3 22µF 5 AGND TPS22961DNY VBIAS LC1 OUT L1 AGND SH-JP1 AGND C4 0.01µF VIN TP6 TP7 ON VBIAS AGND JP3 AGND TP8 TP9 GND 1 2 3 SH-JP3 LQM21PN2R2MC0D 2.2µH GND C5 22µF C6 22µF AGND TP11 GND LC2 OUT L2 AGND AGND TP10 AGND AGND VOUT AGND J2 2 1 C7 1µF C8 1µF + - VOUT 6A Max Continuous R1 10.0 AGND AGND AGND JP2 AGND Figure 1. TPS22961EVM-067 Schematic 2 Using the TPS22961EVM-067 Single Channel Load Switch IC SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Layouts www.ti.com 4 Layouts Figure 2. TPS22961EVM-067 Top Assembly SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Using the TPS22961EVM-067 Single Channel Load Switch IC Copyright © 2014, Texas Instruments Incorporated 3 Layouts www.ti.com Figure 3. TPS22961EVM-067 Top Layout 4 Using the TPS22961EVM-067 Single Channel Load Switch IC SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Layouts www.ti.com Figure 4. TPS22961EVM-067 Bottom Layout 4.1 Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the EVM. 4.1.1 J1 – Input Connection This is the connection for the leads from the input source. Connect the positive lead to J1-1 (+) terminal and the negative lead to J1-2 (–) terminal (GND). TP1 is also available for connecting to the input. J1 Connector is rated for currents of 15A, use the J1 input connection point when operating the EVM in the High current mode (IIN > 3A). 4.1.2 J2 – Output Connection This is the connection for the output of the EVM. Connect the positive lead to J2-2 (+) terminal and the negative lead to J2-1 (–) terminal (GND). TP10 is also available for connecting to the output. J2 Connector is rated for currents of 15A, use the J2 input connection point when operating the EVM in the High current mode (IOUT > 3A). SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Using the TPS22961EVM-067 Single Channel Load Switch IC Copyright © 2014, Texas Instruments Incorporated 5 Operation 4.1.3 www.ti.com 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 TPS22961 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 TP7. Refer to the datasheet for proper ON and OFF voltage level settings. A switching signal may also be used and connected at this point. 4.1.4 TP2 –VIN Sense, TP3 - VOUT Sense These two connections are used when very accurate measurements of the input or output 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. 4.1.5 JP1 – Input Capacitor During normal operation a shorting jumper is placed on JP1 this connects C1 capacitor from the input of the device to ground. Refer to the Applications Section of the Datasheet for additional information on selecting the input capacitor.. 4.1.6 C7 and C8 – Output Capacitors During normal operation C7 and C8 capacitors are connected from the output of the device to ground. Refer to the Applications Section of the Datasheet for additional information on selecting the output capacitors. 4.1.7 JP2 – Output Resistor During normal operation no shorting jumper is placed on JP2. A shorting jumper may be used on JP2 to connect R1 10Ω load resistor from the output of the device to ground. R1 is sized for a 2512 1.5W power resistor. 4.1.8 TP4 – VBIAS This connection to the device is used for applying VBIAS voltage, VBIAS voltage range is from 3.0V to 5.5V, VBIAS voltage must be applied for the device to operate. 4.1.9 TP6 – Filtered Outputs These output connections are low current output that can be used as additional loads for the device. 4.1.10 TP8/TP9/TP11 – GND These are connections to GND. 5 Operation Connect the positive input of the VIN power supply to VIN at J1-1 for currents greater than 3A, or connect the positive input of the VIN power supply to VIN at TP1 for currents less than 3A. Connect the negative lead of the power supply to GND at J1-2. The input voltage range of the TPS22961EVM-067 is 0.8V to 3.0V. The VBIAS voltage range of the TPS22961EVM-067 is 3.0V to 5.5V. Connect the positive input of the VBIAS power supply to VBIAS at TP5. Connect the negative lead of the VBIAS power supply to GND at TP8, TP9 or TP11. External output loads can be applied to the switch by connecting between J2-2 VOUT and J2-1 GND for currents greater than 3A. For currents less than 3A, connect the output load between TP10 and GND (TP8, TP9 or TP11). The TPS22961EVM-067 is rated for a maximum continuous current of 6A. Configure JP3 as required. JP3 must be installed for proper operation. When the ON pin is asserted high, the output of the TPS22961 will be enabled. 6 Using the TPS22961EVM-067 Single Channel Load Switch IC SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Test Configuraions www.ti.com 6 Test Configuraions 6.1 On-Resistance (RON) Test Setup Figure 5 shows a typical setup for measuring On-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 5. RON Setup 6.2 Slew Rate Test Setup Figure 6shows 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 outputs with a scope shows the switches ability to have a controlled VOUT ramp. SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Using the TPS22961EVM-067 Single Channel Load Switch IC Copyright © 2014, Texas Instruments Incorporated 7 Test Configuraions www.ti.com Figure 6. Slew Rate Setup 8 Using the TPS22961EVM-067 Single Channel Load Switch IC SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Test Configuraions www.ti.com 6.3 VOUT Slew Rate Examples Figure 7. TPS22961 Vout tR Example (VBIAS = 5V, VIN = 1.05V, RL = Open) SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Using the TPS22961EVM-067 Single Channel Load Switch IC Copyright © 2014, Texas Instruments Incorporated 9 Test Configuraions www.ti.com Figure 8. TPS22961 Vout tR Example (VBIAS = 5V, VIN = 1.05V, RL = Open) 10 Using the TPS22961EVM-067 Single Channel Load Switch IC SLVUA42A – February 2014 – Revised March 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Bill of Materials (BOM) www.ti.com 7 Bill of Materials (BOM) Table 2. Bill of Materials (1) Designator Quantity PCB 1 C1, C7, C8 3 C2, C3, C5, C6 4 C4 1 FID1, FID2, FID3 3 Value 1µF 22µF 0.01µF ED120/2D S Description Package Reference Part Number Manufacturer Printed Circuit Board HVL067 Any CAP, CERM, 1µF, 16V, ±10%, X5R, 0603 0603 C0603C105K4PAC TU Kemet CAP, CERM, 22µF, 10V, ±10%, X5R, 0805 0805 CL21R226KQQNN NE Samsung CAP, CERM, 0.01µF, 50V, ±5%, X7R, 0603 0603 C0603C103J5RAC TU Kemet Fiducial mark. This is nothing to buy or mount Fiducial N/A N/A Terminal Block, 2-pin, 15-A, 5.1mm ED120/2DS OST J1, J2 2 JP1, JP2 2 Header, 100mil, 2x1, Tin plated, TH PEC02SAN Sullins Connector Solutions JP3 1 Header, 100mil, 3x1, Tin plated, TH PEC0SAAN Sullins Connector Solutions L1, L2 2 LBL1 1 R1 1 SH-JP1, SH-JP3 2 TP1–TP6, TP10 7 TP7 1 TP8, TP9, TP11 3 U1 (1) 1 2.2µH 10.0 1x2 Red Yellow Black Inductor, Shielded, Ferrite, 2.2µH, 0.8A, 0.23Ω, SMD 0805 LQM21PN2R2NGC Murata Thermal Transfer Printable Labels, 0.650' W x 0.200" H -10,000 per roll PCB Label 0.650"H x 0.200"W THT-14-423-10 Brady RES, 10.0Ω, 5%, 1.5W, 2512 2512 RPC2512JT10R0 Stackpole Electronics Inc. Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M Test Point, Multipurpose, Red, TH Red Multipurpose Testpoint 5010 Keystone Test Point, Compact, Yellow, TH Yellow Compact Testpoint 5009 Keystone Test Point, Multipurpose, Black, TH Black Multipurpose Testpoint 5011 Keystone IC, Ultra- Low on Resistance, 6A Single Chan-Load SW with Controlled Turn-On DNY0008A TPS22961DNY Texas Instruments Alternate Part Number Alternate Manufacturer – – SNT-100-BK-G Samtec None Unless otherwise noted in the Alternative Part Number and/or Alternative Manufacturer columns, all parts may be substituted with equivalents. 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