Table of Contents
Advertisement
Quick Links
www.ti.com
User's Guide
Using the TPS8802EVM
This quick-start guide describes the operation and use of the TPS8802 evaluation module (EVM) and the
accompaning EVM graphical user interface control software.
1
Introduction.............................................................................................................................................................................3
1.1
Applications........................................................................................................................................................................3
1.2 Features.............................................................................................................................................................................
Equipment.................................................................................................................................................3
2
Setup........................................................................................................................................................................................4
Connections...........................................................................................................................................................4
2.2 Jumper and Switch Configurations....................................................................................................................................
Connection..............................................................................................................................................................5
2.4 USB2ANY Connection.......................................................................................................................................................
Evaluation...................................................................................................................................................................8
3.1 CO AFE Evaluation............................................................................................................................................................
3.2 Photo AFE Evaluation......................................................................................................................................................
3.4 Horn Driver Evaluation.....................................................................................................................................................
Map....................................................................................................................................................................28
Layout.........................................................................................................................................................................29
Materials...........................................................................................................................................33
5.1 Schematic........................................................................................................................................................................
Materials.................................................................................................................................................................34
6 Revision History...................................................................................................................................................................
Figure 2-2. TPS880x GUI Connected to USB2ANY Adapter......................................................................................................
Figure 3-2. CO Amplifier Settings................................................................................................................................................
Figure 3-3. Clean Air CO Amplifier Output................................................................................................................................
Figure 3-6. CO Connectivity Test without Sensor......................................................................................................................
Figure 3-7. CO Connectivity Test with Sensor...........................................................................................................................
Figure 3-8. Photo Amplifier Settings..........................................................................................................................................
Figure 3-9. LED Power Supply Settings....................................................................................................................................
Settings...............................................................................................................................................15
Figure 3-12. LED A Signals.......................................................................................................................................................
Figure 3-13. LED B Signals.......................................................................................................................................................
Figure 3-14. Photo Signal with Photo Chamber........................................................................................................................
Figure 3-15. Power Management Evaluation............................................................................................................................
Figure 3-16. Power Management Measurement.......................................................................................................................
Figure 3-17. Sleep Mode with SLP_BST = 1.............................................................................................................................
Figure 3-20. Register Map: ENABLE2 Register........................................................................................................................
SLVUBR8B - OCTOBER 2019 - REVISED JULY 2022
Submit Document Feedback
Table of Contents
Mode..............................................................................................................................19
List of Figures
Connections..................................................................................................................5
Successful........................................................................................................................................7
Menu........................................................................................................................................8
Bit........................................................................................................................................11
Configuration.....................................................................................................16
Setup....................................................................................................21
Register.........................................................................................................................22
Copyright © 2022 Texas Instruments Incorporated
ABSTRACT
Gas............................................................................................10
Table of Contents
3
4
6
9
13
21
33
36
6
9
10
12
12
13
14
17
17
18
19
19
20
22
Using the TPS8802EVM
1
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Texas Instruments TPS8802EVM
Summary of Contents for Texas Instruments TPS8802EVM
-
Page 1: Table Of Contents
Figure 3-14. Photo Signal with Photo Chamber........................Figure 3-15. Power Management Evaluation..........................Figure 3-16. Power Management Measurement........................Figure 3-17. Sleep Mode with SLP_BST = 1..........................Figure 3-18. TPS8802EVM and Three-terminal Piezo Setup....................21 Figure 3-19. Register Map: CONFIG2 Register.........................22 Figure 3-20. Register Map: ENABLE2 Register........................ - Page 2 Figure 3-28. Two-terminal Piezo Waveforms (HORNFB to MCU)..................... Figure 3-29. Register Map Search Function..........................28 Figure 4-1. TPS8802EVM Top Layer PCB Layout........................29 Figure 4-2. TPS8802EVM Ground Layer PCB Layout......................Figure 4-3. TPS8802EVM Power Layer PCB Layout........................ Figure 4-4. TPS8802EVM Bottom Layer PCB Layout....................... Figure 5-1. TPS8802EVM Schematic............................33 List of Tables Table 2-1.
-
Page 3: Introduction
Introduction 1 Introduction The TPS8802EVM is used to evaluate the TPS8802 smoke and CO alarm analog front end (AFE) and power management IC. The EVM allows for easy connection from the TPS8802 to a user-supplied photoelectric chamber and carbon monoxide sensor. The TPS8802 GUI interfaces with the EVM to quickly evaluate the photo amplifier, LED driver, and CO amplifier performance, system power consumption, and other blocks with the register map. -
Page 4: Setup
TI recommends connecting a photoelectric smoke chamber and CO sensor to the TPS8802EVM for the evaluation. The TPS8802EVM has a built-in photodiode (D7), blue LED (D8), and IR LED (D6) for functional testing. These components can be de-soldered in order to connect a photoelectric chamber photodiode, IR LED, and/or blue LED its place. -
Page 5: Power Connection
Peak current drawn from the supply is 600 mA for boost converter operation. If device does not power up with 100 mA current limit, increase the power supply current limit to 600 mA. SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 6: Usb2Any Connection
2-2). With the EVM powered, connect the USB2ANY adapter to the EVM using the USB2ANY adapter 10-pin ribbon cable. Click EXPLORE TPS8802EVM then QUICK START and select the device address corresponding to the J6 jumper (see Section 2.2). Send the test command to verify the EVM, USB2ANY adapter, and GUI software are all connected. -
Page 7: Figure 2-3. Test Command Successful
Setup Figure 2-3. Test Command Successful SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Analog Evaluation
Enter the register map to evaluate the other blocks in the TPS8802 device. Figure 3-1. Evaluation Selection Menu Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Co Afe Evaluation
If a CO sensor is available, connect it to the J17 terminal block. Select the feedback resistance and reference voltage in the GUI software. The TPS8802EVM default configuration uses the internal resistors and references. To use an external feedback resistor, solder a resistor to R5. To use an external input resistor, replace the R1 0-Ω... -
Page 10: Figure 3-3. Clean Air Co Amplifier Output
Analog Evaluation www.ti.com Figure 3-3. Clean Air CO Amplifier Output Figure 3-4. CO Amplifier Output with Sensor and Calibration Gas Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Figure 3-5. Cotest_En Register
The AMUX pulse shape is different if the CO sensor is disconnected. Write COTEST_EN = 0, remove the J15 and J16 shunts, and connect the J7 shunt when finished. Figure 3-5. COTEST_EN Register Bit SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Figure 3-6. Co Connectivity Test Without Sensor
Analog Evaluation www.ti.com Figure 3-6. CO Connectivity Test without Sensor Figure 3-7. CO Connectivity Test with Sensor Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Photo Afe Evaluation
Use the J1, J5, J8, and J14 jumpers to select which supply powers each LED. Enable the LEDLDO if it powers either LED. SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 14: Figure 3-9. Led Power Supply Settings
Set the DAC voltage to fine tune the LED current. Set the temperature coefficient to the required setting. Click SETUP TEST after configuring the photo amplifier, LED power supply, and LED driver. Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 15: Figure 3-10. Led Driver Settings
LEDEN to measure the LED control signal. Probe CSA or CSB to measure the LED driver current. Probe PDO to measure the photo input stage amplifier. Probe AMUX_BUF to measure the photo gain stage amplifier. SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 16: Figure 3-11. Evm Photo Measurement Probe
Analog Evaluation www.ti.com Figure 3-11. EVM Photo Measurement Probe Configuration Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 17: Figure 3-12. Led A Signals
Analog Evaluation Figure 3-12. LED A Signals Figure 3-13. LED B Signals SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 18: Figure 3-14. Photo Signal With Photo Chamber
Analog Evaluation www.ti.com Figure 3-14. Photo Signal with Photo Chamber Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 19: Power Management And Sleep Mode
3-16, the VBAT voltage is raised to 3.6 V to maintain regulation of the MCULDO. Figure 3-15. Power Management Evaluation Figure 3-16. Power Management Measurement SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 20: Figure 3-17. Sleep Mode With Slp_Bst = 1
Register Map page and changing the Auto Read setting to Off. Figure 3-17. Sleep Mode with SLP_BST = 1 Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 21: Horn Driver Evaluation
Analog Evaluation 3.4 Horn Driver Evaluation The TPS8802EVM supports direct connection with a piezo horn. The HBEN pin and HORN_EN register bit enables the integrated horn driver and operates independent of any smoke or CO condition. Connect the piezo horn terminal to the respective EVM terminal as shown in Figure 3-18. -
Page 22: Figure 3-19. Register Map: Config2 Register
3.4.2. The enable register controls the horn driver circuit. Figure 3-20. Register Map: ENABLE2 Register • Set HORN_EN = 1. Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 23: Figure 3-21. Register Map: Boost Register
Use an oscilloscope to probe the EVM test points: HORNSL (TP16), HORNBR (TP16), and HORNFB (TP35). Figure 3-22. EVM Three-terminal Horn Driver Measurement Probe Configuration SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 24: Figure 3-23. Untuned Hornsl, Hornbr, And Hornfb Waveforms
Figure 3-25. Figure 3-24. Feedback Potentiometer Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 25: Figure 3-25. Tuned Hornsl, Hornbr, And Hornfb
HORNSL and HORNBR are square waves out of phase by 180° with each other. Both waveforms operate near a 50% duty cycle. Additionally, HORNSL, HORNBR, and HORNFB oscillate at the piezo resonance frequency of 3.5 kHz. SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 26: Figure 3-26. Tps8802Evm And Two-Terminal Piezo
1-mH inductor between the external piezo M wire and EVM HORNSL terminal. Additionally, remove jumper J11 and jumper J12 with PIEZOF terminal floating. Figure 3-26. TPS8802EVM and Two-terminal Piezo Setup Figure 3-27, set a square wave with the piezo oscillation frequency on the HBEN test point and ground the HORNFB test point. -
Page 27: Figure 3-27. Two-Terminal Piezo Waveforms (Hornfb To Ground)
Likewise, probe the piezo test points to observe the piezo voltage waveforms. Figure 3-28. Two-terminal Piezo Waveforms (HORNFB to MCU) SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 28: Register Map
(?) to display more information about the selected register or bits. Figure 3-29. Register Map Search Function Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 29: Board Layout
Board Layout 4 Board Layout Figure 4-1. TPS8802EVM Top Layer PCB Layout SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 30: Figure 4-2. Tps8802Evm Ground Layer Pcb Layout
Board Layout www.ti.com Figure 4-2. TPS8802EVM Ground Layer PCB Layout Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 31: Figure 4-3. Tps8802Evm Power Layer Pcb Layout
Board Layout Figure 4-3. TPS8802EVM Power Layer PCB Layout SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 32: Figure 4-4. Tps8802Evm Bottom Layer Pcb Layout
Board Layout www.ti.com Figure 4-4. TPS8802EVM Bottom Layer PCB Layout Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 33: Schematic And Bill Of Materials
PREF voltage to 70 mV and prevents the gain stage output from dropping below 50 mV in worst-case conditions. Figure 5-1. TPS8802EVM Schematic SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 34: Bill Of Materials
Resistor, 2.4 M, 5%, 0.1 W, AEC-Q200 Grade 0, 0603 0603 CRCW06034K70JNE 10.0 kΩ Resistor, 10.0 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 0603 Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 35 TP9, TP18, 5011 Black TP19, TP28, Test Point, Multipurpose, Black, TH Multipurpose TP32, TP37, Testpoint TP38 TPS8802DCP, DCP0038A (HTSSOP-38) DCP0038A TPS8802DCP SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Using the TPS8802EVM Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
-
Page 36: Revision History
Changed R13 value to 10.0 kΩ in Table 5-1 ....................• Deleted R15, C19, TP5, TP6 in Table 5-1 ....................... Using the TPS8802EVM SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 37 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...
Need help?
Do you have a question about the TPS8802EVM and is the answer not in the manual?
Questions and answers