TIDUEZ4 May   2021

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 SimpleLink MCU
        1. 2.2.1.1 CC3235MODS
        2. 2.2.1.2 CC1352R LaunchPad
          1. 2.2.1.2.1 CC1352R
      2. 2.2.2 Power
        1. 2.2.2.1 TPS63802
        2. 2.2.2.2 TPS63900
        3. 2.2.2.3 TPS62825
        4. 2.2.2.4 TPS7A03
        5. 2.2.2.5 TPS7A20
        6. 2.2.2.6 TPS62840
        7. 2.2.2.7 TPS22919
        8. 2.2.2.8 LM66100
      3. 2.2.3 Peripherals
        1. 2.2.3.1 OPT3004
        2. 2.2.3.2 DRV8837C
        3. 2.2.3.3 TPA2011
        4. 2.2.3.4 TLV61048
      4. 2.2.4 OmniVision Video Encoder OA7000
      5. 2.2.5 OmniVision Image Sensor SP2329
      6. 2.2.6 YTOT Lens Module
    3. 2.3 Design Considerations
      1. 2.3.1  Input Power: Battery and USB
      2. 2.3.2  Power Requirements
      3. 2.3.3  Camera Wake-up and Day or Night Sensing
        1. 2.3.3.1 PIR and MSP430 Based Motion Detection Design for Low Cost and High Performance
      4. 2.3.4  Battery Gauging
      5. 2.3.5  IR LED Illumination
      6. 2.3.6  IR Cut Filter
      7. 2.3.7  Audio
      8. 2.3.8  System Operation
      9. 2.3.9  Wi-Fi and Host Subsystem
      10. 2.3.10 Firmware Control
        1. 2.3.10.1 Application Flow
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware
    2. 3.2 Software
    3. 3.3 Setup
      1. 3.3.1 Configuration Steps for Video over Wi-Fi
      2. 3.3.2 (Optional) Flash OA7000 With Latest Firmware or Stream Video Over USB
      3. 3.3.3 Audio Streaming
      4. 3.3.4 LPSTK-CC1352R Configuration Steps for Camera Module
    4. 3.4 Test Results
      1. 3.4.1 Power Supply Rails and Current Consumption
      2. 3.4.2 Battery Life Calculations
      3. 3.4.3 Video Streaming
      4. 3.4.4 IR LED Drive
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Bill of Materials
    2. 4.2 Software
    3. 4.3 Support Resources
    4. 4.4 References
    5. 4.5 Trademarks
  10. 5About the Author

1 System Description

Table 1-1 Key System Specifications
PARAMETERSPECIFICATIONS
Capture and streaming qualityVideo2 MP, 1080p at 48 FPS (1920 × 1080)
Audio

Analog microphone input

Mono speaker output

Supported wireless networks

802.11 a, b, g, and n: 2.4 GHz and 5 GHz

Multiprotocol sub-1 and 2.4 GHz wireless

Featured protocolsRTP and RTSP
PowerBattery

Input range: 2.4 V to 5.5 V

Recommended battery types:

3.7 V Li-ion

1.5 V Alkaline (2S, 3S)

1.2 V NiMH (3S, 4S)

Battery pack (SY634-F031-ND)

USB5.0 V (Micro USB 2.0)
Battery life1.5 years (6000 mAH at 25 s video and 10 s IR LED illumination per day)
Sensing

Pyro (PIR) detection: external sensor

Ambient light sensing with IR rejection

LensSize1/2.7 inch
Resolution1920 × 1080 (HD)
Field of view90.84°
Focal-length3.8 mm
FeaturesSupports focus, iris, and integrates IR cut filter
Day or night visionIR LED driver (illumination)

Supports 6-series LEDs with IF = 1 A, 500 mW/sr radiant intensity, and VF = 1.7 V

Motorized IR-cut filter 22 Ω coil resistance, 3.3 V drive

Camera activation

Configurable:

PIR, network, doorbell

Operating temperature–30°C to 60°C

Many wireless network cameras or video doorbells are designed to operate in locations where power cables might not be accessible. Those locations include the front door, high in the ceiling, top of the doors, a tree in the garden, or others. The goal is to mount the camera at any location without the need to install power cables. Since the camera is battery powered and is mounted on locations which are not easily accessible to replace the batteries, it is highly important to have very efficient power solutions to get the maximum possible battery life.

This reference design provides a solution for a battery-operated wireless camera by combining industry-leading image processing, connectivity, sensor, and power solutions. Highly efficient power converters along with optimized system architecture help to increase the battery life. The image processor together with a Wi-Fi® connectivity device enables secured high-quality live video streaming and two-way audio streaming with noise reduction and echo cancellation. It provides day and night vision capabilities by integrating ambient light sensing as well as efficient IR LED driver and motorized IR cut filter.

This reference design solution enables developers to quickly design their end applications for high-performance wireless battery-operated cameras while optimizing overall system power for longer battery life.

GUID-20210422-CA0I-0JB2-JQPQ-1L7TQLBQTXWD-low.jpgFigure 1-1 Reference Design Board – PCB