Freescale Semiconductor mini USB interface IC

Freescale Semiconductor has introduced a mini USB interface IC that helps mobile device designers and manufacturers create smaller, sleeker consumer products by enabling a single mini USB connector for external accessories including chargers, headsets, microphones and audio/data connections.

The device also lowers power consumption and extends battery life by supporting all-passive audio accessories such as stereo audio, microphone and cord remote control functionality.

The IC uses intelligent switching to identify up to 32 different accessory types, such as headsets, microphones and chargers. It automatically identifies the attachment and informs the host system, switching the signal or setting the charge current based on the plugged-in charger.

As a universal charger, the device supports multiple charger types including AC, DC and USB. The IC identifies the battery charger type and sets the charge current level accordingly.

Additional battery charging features include up to 28 V OVP for the VBus power input, ultralow operating current (<10 uA at standby), a power-save mode and automatic detachment detection.