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PMP11311
Power Reference Design for a Wearable Device with Wireless Charging using the bq51003 and bq25120
PMP11311
Overview
Wearable devices require advanced power management to achieve long battery run times with always-on functionality. Additionally, the devices need to use small rechargeable batteries and enable small footprint designs. This application note shows the implementation of a scalable power management solution for wearables that can be tailored for activity monitors or smart watches. The design provides a wireless charging input, highly configurable battery management solution with Li-Ion battery charger and low quiescent current (Iq) DC/DC buck, boost converter for PMOLED display, boost converter for Heart Rate Monitor (HRM), and second configurable low Iq DC/DC buck.
Features
- Wireless charging for ease of use
- Configurable charger and system power management
- Boosts for display and heart rate monitor
- Second buck for radio or dual core MCU
| Output voltage options | PMP11311.1 | PMP11311.2 | PMP11311.3 | PMP11311.4 | PMP11311.5 |
|---|---|---|---|---|---|
| Vin (Min) (V) | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| Vin (Max) (V) | 20 | 20 | 20 | 20 | 20 |
| Vout (Nom) (V) | 4.2 | 1.8 | 1.8 | 5 | 12 |
| Iout (Max) (A) | .3 | .3 | .3 | .3 | .1 |
| Output Power (W) | 1.26 | .54 | .54 | 1.5 | 1.2 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | DC | DC | DC | DC | DC |
| Topology | Linear Regulator | Buck- Synchronous | Buck- Synchronous | Boost- Synchronous | Boost- Synchronous |
Industrial
- Appliance battery chargers
- Biochemistry analyzer
- Blood glucose monitor
- Blood pressure monitor
- CPAP machine
- Continuous glucose monitor aggregator
- ECG patch
- Endoscope
- Multiparameter patch
- Patient monitor - ECG module
- Patient monitor - SPO2 module
- Patient monitor - power & backend module
- Patient monitor - subsystems module
- Patient monitor - wireless module
- Patient monitor blood pressure module
- Pulse oximeter
- Temperature sensor patch
Personal electronics
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
SLUA748A.PDF (6649 K)
Test results for the reference design, including efficiency graphs, test prerequisites and more
TIDRJ51.PDF (567 K)
Detailed schematic diagram for design layout and components
TIDRJ52.PDF (114 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRJ53.ZIP (8502 K)
Files used for 3D models or 2D drawings of IC components
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) | PDF | HTML | Apr. 14, 2016 |
| More literature | Adapting Qi-compliant wireless-power solutions to low-power wearable products | Jun. 06, 2014 | ||
| Analog Design Journal | Accurately measuring efficiency of ultralow-IQ devices | Jan. 22, 2014 | ||
| Analog Design Journal | High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions | Jul. 25, 2013 |
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