User’s Guide March 2013 LMP8480 / 81 EVM User’s Guide CONTENTS 1. INTRODUCTION ................................................................................................ 3 2. FEATURES ........................................................................................................ 3 3. BOARD CONNECTIONS AND COMPONENTS ................................................. 4 3.1. GENERAL SAFETY PRECAUTIONS ................................................................. 4 3.2.
User’s Guide March 2013 LMP8480 / 81 EVM User’s Guide LIST OF FIGURES Figure 1: Picture of Evaluation Board (LMP8480 version) ........................................................................................... 3 Figure 2: Rsense Terminals .......................................................................................................................................... 4 Figure 3: Cutting pads to accommodate 4-wire resistors ....................................................................
User’s Guide March 2013 LMP8480 / 81 EVM User’s Guide 1. Introduction The Texas Instruments LMP8480/81 evaluation module (EVM) helps designers quickly evaluate the operation and performance of the LMP8480/81 76V Precision High Side Current Sense Amplifiers. The EVM is ready to connect to power, load, and test instruments through the use of on-board terminals. Figure 1: Picture of Evaluation Board (LMP8480 version) The EVM contains one LMP8480 or LMP8481 high side evaluation circuit.
Setup 3. Board Connections and Components This section describes the jumpers and connectors on the EVM as well and how to properly connect, set up the EVM board. 3.1. General Safety Precautions Connections with 48V or 1A and above should be securely soldered to the terminals to prevent inadvertent disconnection. Voltages above 70V must be soldered. Clip-on leads are not recommended at high voltages. Follow all standard high voltage precautions.
Setup For 4-wire, or “Kelvin” resistors, Figure 2 shows how the sense traces can be cut with an E-Xacto knife to attach to the “sense” terminals on a 4-Wire surface mount resistor. Figure 3: Cutting pads to accommodate 4-wire resistors Load ground currents should be kept off the board. Load current should be returned directly to the power supply terminals and not through the demo board grounds. 3.4.
Setup 3.5. Reference Inputs (Bi-Directional Devices Only) For Bi-Directional devices, the “zero” output level can be set by a voltage applied to the reference pins. The reference voltages may be applied externally through the VREF pin, or sourced from the VCC line. These jumpers will have no effect on devices without reference pins!!! C6 and C7 are available if reference line bypassing or filtering is desired.
Setup 3.7. Input VSENSE Test Point – TP1 TP1 allows for the monitoring of the VSENSE voltage through a standard 0.1” header. TP2 provides a convenient ground if needed. The meters terminals need to be “floating” (not grounded) and will be at the common mode voltage (Vsource) potential. 3.8. DUT Mounting Options For applications where the DUT must be swapped-out, mounting holes are provided for a reusable “Rainbow Clamp” socket from Rainbow Labs (See Bill of Materials).
4. Board Test Procedure for Uni-Directional Devices (LMP8480-S) Required Equipment: • • • • 1 ea. 20V, >1A power supply 2 ea. 4.5 digit or better DMM (Agilent 34401 or equiv) 1 ea. 20 ohm, >25W power resistor or programmable load sinking 1A. Misc test leads for connections. Connect board as shown, but do not connect SENSE- to load yet. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Connect 20V power supply as VSOURCE (turn off power for now).
5. Board Test Procedure for Bi-Directional Devices (LMP8481-S) Required Equipment: • • • • • 1 ea. 10V, >1A power supply 2 ea. 4.5 digit or better DMM (Agilent 34401 or equiv) 1 ea. 20 ohm, >20W power resistor or programmable load sinking 0.5A. 2 ea 0.1” Jumper blocks Misc test leads for connections Connect board as shown, but do not connect SENSE- to load yet. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Connect 10V power supply as VSOURCE (turn off power for now).
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7. Bill of Materials Table 2: Bill of Materials Designator EVB Current Sense Evaluation Board † C1 † † C2, C3 , C4 , † C5 † † C6 , C7 † C8 DUT1 † † H1 , H2 , † † H3 , H4 † † H5 , H6 , † † H7 , H8 J1, J2, J3, ‡ ‡ J4, J5 , J6 , J7, J8 † † J9 , J10 ‡ ‡ JP1 , JP2 † Riso Rsense † † Rt+ , Rt† TP1 TP2 SKT Description † CAP, CERM, 4.7uF, 100V, +/-20%, X7R, 2220 CAP, CERM, 0.1uF, 100V, +/-10%, X7R, 1206 CAP, CERM, 0.
EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of of 4.0V to +75V; a supply voltage (Vs) range of +4.5V to +75V; and the output voltage range of GND + 0.05V to ( Vs – 0.4V or 13.6 – whichever is less). Total dissipation of the TI installed sense resistor shall not exceed 0.5W. Turret terminals are rated for 5A max. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.
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.
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).
【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. 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.
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.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
