USB and Quick Charge (QC) are two new power supply standards in the current market and are also market trends. A common feature of these two standards is that the output needs to be adjusted. The single inductor H-bridge buck-boost NCP81239 is available in a wide input voltage range and wide output voltage range. It is ideal for applications such as USB type-c or QC 3.0 that require voltage regulation based on the requirements of the consumer. The chip-integrated I2C interface can be used with external (MCU) for stepping adjustment of the output voltage, and can implement multiple fast charging protocols such as USB PD type-c and QC 2.0/3.0 in the same type-c port. Apple Lightning interface fast charge protocol, and Samsung interface fast charge protocol.
1. USB Type-C
Electronic products such as computers, mobile phones, digital cameras, etc. often need to be interconnected with other electronic devices to transmit data or provide. However, adapters and cables of various specifications are inconvenient to use, and the weight of the travel bag is also increased. . In order to reduce the number of harnesses and unnecessary waste, the USB Type C interface standard came into being. The goal of the USB Type C interface is to use a uniform interface between the interconnections of different electronic devices, while providing power and transmission data, as well as audio and video and customer-specific communication protocols. The evolution of USB charging technology is shown in Figure 1.
USB PD supports power supply of different power levels. It supports 5 V@2A by default when booting. It can be adjusted to 18 W, 36 W, 60 W, 100 W, etc. as needed. The cable needs to support more than 1.5 A current. The larger power output needs to be adjusted. Output the voltage to a higher value to ensure that the cable current does not exceed the specifications. In addition, the USB PD protocol also supports additional power and voltage options.
2. Quick Charge
Quick Charge is a technology developed by Qualcomm to support the rapid charging of handheld devices. The output voltage is increased by increasing the output voltage to reduce the loss on the cable and the connector. The output voltage is set by the different states of the USB signal lines D+ and D-. The QC 3.0 standard supports 200 mV/step voltage regulation to optimize the conversion energy efficiency of the handheld device's charging section and reduce temperature rise.
The Type-C interface is becoming a single interface for interconnection between electronic products. The high voltage USB PD requires different voltages and powers to regulate the output voltage. The features and comprehensive protection features of ON Semiconductor's NCP81239 make it ideal for highly reliable applications requiring wide voltage inputs and adjustable voltage outputs, such as USB PD and Quick Charge, and battery charging, with its unique control mode. Efficient buck-boost conversion, up to 1.2MHz operating frequency for a compact design.