Adaptive rapid charging is the latest in USB battery charging technology that can charge devices 75% faster than conventional chargers. At the forefront of this technology is Qualcomm's Quick Charge 2.0 protocol. Quick Charge 2.0 works by detecting commands from Quick Charge 2.0 enabled devices, such as a cellphones and tablets, and adjusting the output voltage of the AC-DC charger to increase power delivery to the device’s battery.
To meet the need for adaptive rapid charging systems, Power Integrations has developed the "ChiPhy" (charger physical interface) family of ICs. Used in combination with one of Power Integrations' AC-DC switcher ICs, such as TOPSwitch or TinySwitch, ChiPhy ICs add adaptive rapid charging functionality to AC-DC wall chargers.
The first in Power Integrations' line of ChiPhy ICs is the CHY100, specifically design to work with Quick Charge 2.0. If a device is not Quick Charge 2.0 compliant, the ChiPhy IC disables output voltage adjustment to ensure safe operation.
Fully supports Quick Charge 2.0 specification
- Class A: 5, 9, and 12 V output voltage
- Class B: 5, 9, 12, and 20 V output voltage
USB battery charging specification 1.2 compatible
- Automatic USB DCP shorting D+ to D- line
- Default 5 V mode operation
Supports TOPSwitch and TinySwitch
Very low power consumption
- Below 1 mW at 5 V output
Fail safe operation
- Adjacent pin-to-pin short-circuit fault
- Open circuit pin fault
- Battery chargers for smart phones, tablets, netbooks, digital cameras, and bluetooth accessories
- USB power output ports
|D+ (V)||D- (V)||V(out)*|
|0.6||GND||5 V (default)|
*Connecting pin V3 to the BYPASS pin (directly or through a resistor up to 100 kΩ) will limit output voltage to 12 V.