Introduction; Applications; Features; Recommended Equipment - Texas Instruments TPS8802EVM User Manual

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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. For a more thorough evaluation, an external microcontroller can be connected to the
TPS8802EVM to create a smoke detection system.

1.1 Applications

• 10-year battery smoke and CO alarms
• AC powered smoke and CO alarms

1.2 Features

• Dual LED drivers for blue and IR LEDs
• Wide bandwidth, low offset photodiode amplifier
• Ultra-low power CO transimpedance amplifier
• LDOs for internal analog blocks and external microcontroller
• Single buffered analog output AMUX for CO and photo signals
• Serial interface for configuring amplifiers, drivers, regulators
• Default-enabled boost converter for 2-V battery operation
• Horn driver with self-resonant and PWM modes
• Interconnect driver for multi-alarm connection
• Power-saving sleep mode with wake-up interrupt
• Battery test load
• Under-voltage, over-temperature fault monitors
• Wide input voltage range for flexible power supply configuration

1.3 Recommended Equipment

• 2-V to 15.5-V power supply capable of 100 mA
™
• USB2ANY interface adaptor
• TPS880x GUI software
– Installation files are available in the TPS8802EVM product folder
• Multimeter for measuring supply current, regulator voltages and CO amplifier output
• Oscilloscope for measuring photodiode signal pulse shape
SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022
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Introduction
Using the TPS8802EVM 3