Innovative interface technology reduces mechanical design constraints in true wireless earbuds
POW:COM is an interface technology from ams which enables the exchange of power and communication between a true wireless earbud and a charging cradle over a two-wire connection. A true wireless earbud previously required as many as six pins to provide both power transfer and communication, compromising the mechanical design of devices that require a form factor small enough to fit comfortably in the user’s ear. The ams POW:COM interface technology enables simultaneous data communication at a net data rate of 1kbit/s and a 150mA charging current, far more than applications need today.
The POW:COM interface is implemented with an ams AS3442 host IC in the cradle, and an AS3447 client IC in each earbud.
A single transmission line between a pair of AS3442 and AS3447 devices provides for: - Power transfer at 5V
- I2C communication
- Interrupt signals
- Up to five GPIOs
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Bi-directional buffer for serial busses in hot-swap environment
The Diodes Inc., PI6ULS5V9511A is an I2C/SMBus buffer which enables hot-swapping of line cards in ‘always-on’ networks.
The PI6ULS5V9511A provides the protection needed to hot-swap cards that employ serial busses such as I2C and SMBus. It provides an effective bi-directional buffer between the card’s data and clock signals and the system’s live busses. Integrated control circuits detect bus activity, allowing the PI6ULS5V9511A to maintain electrical isolation between the live system and the line card until it identifies a Stop command or until the bus is idle, at which point it switches in the signals without causing bus contention or data disruption. This eliminates the potential for bus corruption during card insertion and removal.
- 400kHz I2C interface
- Operating voltage range: 2.7V to 5.5V
- 70ns propagation delay
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Offline voltage regulator ideal for use in home appliances
The MP175 from Monolithic Power Systems is a primary-side regulator IC which provides accurate, constant-voltage regulation without an optocoupler. It supports buck, buck-boost, boost and flyback topologies.
The MP175 includes a 700V MOSFET and high-voltage current source, and provides fixed and adjustable output-voltage options.
Both the peak current limit and switching frequency decrease with decreasing load, providing excellent efficiency in light-load conditions and improving average efficiency.
The MP175 is an ideal regulator for offline low-power applications, such as home appliances and stand-by power.
- <30mW no-load power consumption
- Up to 10W output power
- 600mA continuous output current
- Multiple system protection functions
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Synchronous buck converter IC provides up to 6.5A output
The MP2329 from Monolithic Power Systems is a high-frequency, synchronous rectified step-down converter. Housed in a 2mm x 2mm QFN-11 package and requiring a small number of external components, the MP2329 produces 6.5A of continuous output current and a 7.5A peak output from a wide input-supply range of 4.5V to 24V.
Monolithic Power Systems’ proprietary switching loss-reduction technique and integral low-resistance power MOSFETs provide for high conversion efficiency. The MP2329’s adaptive constant on-time control mode provides for fast transient response and eases feedback-loop stabilization.
- Good load and line regulation
- 105μA quiescent current
- Fixed 700kHz switching frequency
- Internal soft-start
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