Power Management Solutions for Wearable Tech & IoT Devices
Engineered to optimise power consumption and maximise battery performance
Solutions for Applications powered by Li-ion Batteries
In today's market, applications fuelled by Li-ion batteries have taken the world by storm. From wearable tech and IoT devices to tablet computers, these batteries have become the lifeblood of the products we rely on daily.
No matter the system requirements or battery size, the fundamentals of Li-ion design remain consistent. Designers consistently seek small, efficient solutions that consume low power to extend battery life.
Torex provides a range of power management solutions tailored for single-cell Li-Ion systems. Whether you're working on a simple device or a more complex system with multiple higher current rails, Torex’s low-power ICs can provide the perfect solution.
Torex's innovative technology can be seamlessly integrated to optimize power consumption and maximise battery performance.
Overview
Using a single Li-ion Battery to power a simple system
Key system requirements:
- Implement discharge prevention during shipment and have an effective countermeasure for a system freeze
- Ensure the highest efficiency with ultra-low power consumption for the main power circuitry
- Must have low noise output from the LDO for the RF and sensor rails
Circuit Block | Torex Series | Key Features | Buy Now |
|---|---|---|---|
| 1. Battery Charger | XC6803 XC6808 | CC/CV charging, CC=~280mA/40mA | |
| 2. Push Button SW | XC6194 | ISTB=1nA, ship mode (OFF during transit) and to reset system freeze state, 1A | |
| 3. Step-down DC/DC | XCL232 XC9276 XCL202 | Iq=200nA, Integrated coil, PFM, 150mA, Low EMI Iq=200nA, PFM, 150mA, VSET pin Integrated coil, PWM/PFM, 1.2MHz, 400mA, Ultra-low EMI | |
| 4. LDO | XC6241 | Iq=0.6μA, PSRR=60dB, GO Mode, 150mA | |
| 5. RESET IC | XC6136 | Iq=100nA class Ultra Low Iq |
Operation and purpose:
(2) Push button load SW with built-in ship-mode function
- Our XC6194 is a simple solution for disconnecting the system during shipment (ship mode). It can also be used to RESET the whole system in the event of a software freeze event.
- Ultra-low quiescent current DC/DC are ideal for this application. Our XCL232 and XC9276 offer very low Iq (200nA typ.) and the XC9276 has an additional VSET function, which allows the designer to select a lower VOUT for when the MCU is sleeping.
- To further reduce the EMI, our XCL202 Micro DC/DC provides a compact solution with a lower switching frequency, which is ideal for noise-sensitive supply rails required for sensors and RF circuits.
(4) LDO for RF / Sensor
- The Green Operation (GO) function changes the operation of the LDO automatically between Low-Power and High-Speed modes, which ensures both low quiescent current and high-speed operation with fast transient response and low output noise.
Using a single Li-ion Battery to power a system with multiple higher current rails
Key system requirements:
- Ensure the highest efficiency with ultra-low power consumption for the main power circuitry.
- Minimise EMI with careful selection of small, highly integrated solutions.
- Allow for automatic switching between the main 5V supply and the Li-ion battery when 5V is removed.
- Implement discharge prevention during shipment and have an effective countermeasure for a system freeze
Circuit Block | Torex Series | Key Features | Buy Now |
|---|---|---|---|
| 6. Battery Charger | XC6803 XC6804 | CC/CV charging, CC=~280mA/800mA | |
| 7. Ideal Diode | XC8110 XC8111 | VF=20mV, 500mA (XC8110) or 1A (XC8111) | |
| 8. Step-down DC/DC | XCL205 XCL206 XCL211 XCL212 | Integrated coil, PWM/PFM, 3MHz, 600mA Integrated coil, PWM/PFM, 2.4MHz, 2A | |
| 9. Reboot Controller | XC6190 | Output reset signal by holding SW1 and SW2 low 'L' |
Operation and purpose:
(7) Load switch with Ideal Diode function
- The circuit above automatically switches between the main 5V input rail and the Li battery output using the XC8110/11 ideal diode in an OR circuit configuration.
- Adding Nch FET will implement a shipping-mode function, whereby the system can be disconnected from the battery when the product is shipped from the factory to the end user. The system can be reconnected when the user pushes the power button.
(8) Step-down DC/DC for MPU / Memory / FPGA at point of load (POL)
- Stable operation with a small size and low EMI can be realised by placing a Micro DC/DC with an integrated coil close to the POL.
(9) Push button Reboot controller:
- Adding a push button reboot IC that can reboot the system by pressing and holding the external switch as a countermeasure for system freezes. The switch can also be shared with the MCU for other functions.
Featured Products
XC6810
The XC6810 is a highly integrated solution for battery charging that offers exceptional charge/discharge management and a diverse range of functions tailored for smaller capacity Li-ion batteries. This innovation caters to wearable technology, hearable devices, and IoT applications.
The Charging Current (CC) can be set from 1 mA to 25 mA and the Charging Voltage (CV) range is from 3.8 V to 4.3 V. Other features include Current Path and Input Current Limit, the prevention of discharge by shutdown and Wake-up by push button or VIN.
There are extensive protection features (over-discharge, short, thermal control, and reverse current prevention) and The XC6810 can be charged by direct input up to 28 V.
Encased within a low-profile, ultra-small WLP-12-01 package, measuring just 1.17 x 1.57 x 0.33 mm, the XC6810 stands as an ideal choice for situations where space is at a premium.
Key features:
- Control and discharge prevention suitable for small Li batteries.
- Monitor outputs for state of charge and battery voltage.
- Energy Harvesting and special functions for specific applications.
XC6193 and XC6194
The XC6193/94 is a Push Button Load Switch that's tailored to perfectly suit battery-operated devices. By adding the XC6193/94 between the battery and the main power circuit, or between the battery and the MPU if the MPU is connected directly to the battery without any power circuit, it is possible to completely shut the line from the battery, which in turn stops the battery draining over time. The battery power line can easily be re-established with a signal to the SHDN pin or via the activation of an external push button.
This IC comes equipped with safety features including inrush current limit, soft start, CL discharge, and short circuit protection. With an expanded input voltage range (1.8V~6.0V) and an impressively low quiescent current (0.13μA), both the XC6193 and the XC6194 now cater to a broader spectrum of applications. Additionally, the XC6193 offers the possibility of an External FET, enabling a higher output current capacity.
For a compact solution, the XC6194 is available in the USP-8B06 Small Low-Profile package, measuring 2.0 x 2.0 x 0.33mm.
Key features:
- Shipping Mode – avoid battery drainage during transportation
- Ultra Low Profile Package - 2.0 x 2.0 x 0.33mm
- Wide input voltage range - 1.8V~6.0V
- Low Power - 0.13μA quiescent current
XC9276
The XC9276 is an ultra-low power 150mA step-down synchronous DC/DC converter that has an output voltage select function (VSET) that enables two separate voltages to be pre-selected. The XC9276 boasts an exceptionally low quiescent current, ensuring impressive efficiency even at light load currents. The synergy between this low quiescent current and the VSET capability makes the XC9276 a clear solution for significantly extending battery life.
Key features:
- Ultra Low Power - 200nA Quiescent Current
- VSET Function - 2 Pre-set VOUT Voltage are selectable
- Ultra Low-Profile Package, only 1.07 x 1.72 x 0.33 mm
Videos
Torex Low Iq DC-DC Convertors: XC9276 XC9145
The XC9145 and XC9276 provide high efficiency with low power consumption in both active and sleep modes, providing two times the battery life in typical applications.
Torex XC6193/XC6194 Push Button Intelligent Load Switch
The XC6193 and XC6194 series consist of intelligent load switches which can significantly reduce power consumption.
Torex Sept XC6810 Tech Explainer
The XC6810 is a highly integrated battery charging solution with optimal charge/discharge management and various functions for small Li-ion batteries in wearable, hearable and IoT devices.