USB 2.0 Hub Controller Chip With Battery Charging Function

The µPD720115 will make it easier to develop products that support simultaneous data communication complying with the USB 2.0 standard and charging portable devices via a single USB connector, such as PCs, digital TVs, and charging adapters. It can help shorten system architecture development cycles and reduce development costs.

In recent years, the USB communication market has become divided into two segments as a result of faster data transfer speeds. The first segment centers around storage devices, such as hard disk drives, which require high-speed data transfer. It utilizes the USB 3.0 standard, which supports data transfer speeds up to 5 gigabits per second (5 Gbps). The second segment includes applications such as digital TVs, printers, audio components, and industrial equipment. This segment employs the earlier USB 2.0 standard, which supports data transfer speeds up to 480 megabits per second (480 Mbps). USB 2.0 remains a widely used interface for connecting devices of all sorts.

The European Commission (the executive of the EU) has adopted Micro USB as the standard charger interface for mobile phones, smartphones and tablet PCs sold in Europe. As a result, applications in which the communication USB ports of PCs and docking stations are used for charging such portable devices are increasing. The market for products complying with the USB 2.0 standard in these application fields is growing rapidly, and it is expected to continue to expand moving forward.

In response to this demand, Renesas decided to develop and introduce to the market the µPD720115, utilizing technology accumulated over many years of developing products with USB support. Renesas has long devoted considerable attention to the USB interface, offering a broad lineup of microcontroller products equipped with USB functions. The µPD720115 is a USB hub controller suitable for a wide variety of systems requiring USB functionality, and is also ideal for extending the number of ports of a USB MCU.

Key Features Of The µPD720115:

1) Supporting the USB BC 1.2 standard, for easy development of USB charging system architectures

The µPD720115 implements a total of four USB ports with battery charging functionality. It supports the USB BC 1.2 standard, which supports charging currents of up to 1.5 amperes. Since the µPD720115 supports both USB communication and rapid battery charging in this way, developing a USB charging system architecture is easy.

2) Built-in dual voltage regulators and clock output function, making it possible to build more compact systems at a lower cost

Comparable earlier products required external voltage regulators, but the µPD720115 integrates a 5 volt and a 3.3 volt regulator on-chip. This allows the user to employ the 5 V from the USB cable as a power supply without modification. There is no need to include an external regulator in the system design.

The µPD720115 also has a clock output function (24 MHz) to enable cascade connection of the USB ports to other µPD720115 chips or connection to other chips used by USB peripheral devices. This eliminates the need to add an external crystal oscillator for the lower-level chip, as was previously the case. The µPD720115 makes it possible to create a USB charging system architecture that is both lower in cost and more compact.

3) Operating temperature range extending down to −40°, enabling use in a wide range of application fields

Comparable earlier products had an operating temperature range with a lower limit of 0° or above, but the µPD720115 extends this down to −40°. This provides support for the operating temperature range requirements of typical industrial equipment.

Moving forward, Renesas plans to actively develop USB products to meet evolving market requirements and to market them in a timely manner.

Availability

Samples of the µPD720115 USB 2.0 hub controller chip will start in June 2013. Mass production of the µPD720115 is scheduled to begin in September 2013 and is expected to reach a scale of 1,000,000 units per month in 2014.