Texas Instruments ATL431 User Manual Download Page 3 | Manualshive

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Texas Instruments ATL431 User Manual Download Page 3

Overview

1.3

PCB

The PCB layout for the ATL431EVM is illustrated in

.

Figure 2. ATL431EVM PCB Layout

3

SLVUAE7 – April 2015

ATL431 Adjustable Shunt Regulator EVM

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Copyright © 2015, Texas Instruments Incorporated

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Summary of Contents for ATL431

Page 1: ...o create a replica of the internal reference voltage The EVM is configured with resistor options to set the cathode current resistor options to set the cathode voltage and load capacitor options to check stability A test point can be connected to an external power supply to provide power All of the ATL431 input and output pins are accessible for external connection via test points 1 1 ATL431EVM Fe...

Page 2: ... 2µF C11 Anode 1 2 3 4 5 6 7 8 9 10 11 12 P1 1 2 3 4 5 6 7 8 9 10 11 12 P3 1 2 3 4 5 6 7 8 9 10 11 12 P2 1 2 3 4 J2 1 2 3 4 5 6 7 8 9 10 J1 TP1 TP2 TP3 TP4 Load Cap Selection C L Ik Selection R SUP Gain Selection R ONE Gain R TWO Overview www ti com 1 2 Schematic The schematic for the ATL431EVM is illustrated in Figure 1 Figure 1 ATL431EVM Schematic 2 ATL431 Adjustable Shunt Regulator EVM SLVUAE7 ...

Page 3: ...CB The PCB layout for the ATL431EVM is illustrated in Figure 2 Figure 2 ATL431EVM PCB Layout 3 SLVUAE7 April 2015 ATL431 Adjustable Shunt Regulator EVM Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Page 4: ...ng the ATL431EVM package ensure that the following is included 1 pc ATL431EVM board using one ATL431 2 3 Power Supply Setup and Functional Test A 40 V power supply capable of 100 mA of current is required Connect the positive power supply lead to the VCC on TP1 Connect the negative power supply lead to anode on TP4 Place a jumper on the 10k option of the Ik Selection section and set VCC to 5 V Ena...

Page 5: ...for operation The ATL431 needs 35 µA in order to operate in the proper gain region for accurate regulation Use Equation 1 to determine the cathode current 1 As shown in Figure 2 this portion is in the top left hand corner and is indicated as Ik Selection on the PCB Each jumper is denoted with its respective resistor value When setting IKA with R1 R5 be sure to not exceed the absolute maximum ratin...

Page 6: ...to measure this by setting the load capacitance CL As shown in Figure 2 this portion is on the right side of the PCB and is indicated as Load Cap Selection Each jumper is denoted with its respective capacitance value These capacitors are all ceramic and have very low ESR 4 Test Modes The ATL431EVM can be configured to measure practically every parameter shown in the typical characteristics of the ...

Page 7: ...IK www ti com Test Modes Figure 8 Test Circuit for Reference Impedance ZKA Figure 9 Test Circuit for Stability Boundary Conditions Figure 10 Test Circuit for Pulse Response 7 SLVUAE7 April 2015 ATL431 Adjustable Shunt Regulator EVM Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Page 8: ...ring the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 9: ... 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 Concernant les EVMs avec antennes détachables Conformément à la rég...

Page 10: ... 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 even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 11: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 12: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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