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New Components from ON Semiconductor Support Development of High Efficiency Next Generation Portable and Consumer Electronics  Chinese German Japanese Korean

Company introduces integrated Class D audio amplifiers and current limiting switch products for a wide range of portable and consumer applications

NCP2704 audio subsystem IC

Electronica MUNICH, Germany – Nov. 8, 2010 – ON Semiconductor (Nasdaq: ONNN), a premier supplier of high performance silicon solutions for energy efficient electronics, has announced four new products designed to support portable and consumer electronics applications.

ON Semiconductor offers a comprehensive range of power management, protection, audio and video solutions for portable and consumer applications. With an emphasis on integration, low power and high efficiency in low profile, small footprint packages, ON Semiconductor is able to support the needs of both current and future generation portable and consumer products such as smart phones, personal media players, digital cameras, LCD televisions, set-top-box and DVD players.

Electronica 2010 – ON Semiconductor Portable Consumer Sector Product Launches
The NCP2704 audio subsystem IC and the NCP2824 low noise Class D amplifier represent the latest audio offerings from ON Semiconductor.  The two devices give designers high efficiency and space saving solutions for their portable power amplifier requirements.

The NCP2824 is a low Electro-Magnetic Interference (EMI) Class D amplifier with Auto Gain Control (AGC), and power limiter functions. The NCP2704 is a subsystem that integrates the same low noise Class D amplifier with a very low power headphone amplifier which helps to extend battery life thus enabling longer audio playback time. Both devices deliver overall efficiency levels of approximately 90 percent and are designed to cover the audio power requirements of a wide variety of portable electronic devices such as cell phones, mobile Internet browsing devices and hands-free car kits. 

A non-clipping function featured on both devices automatically reduces the amplifier’s gain in order to limit the distortion when an excessive signal is applied to the input. This adjustment is enabled by the Automatic Gain Control (AGC) circuit that is built into the chip. The power limiter function limits the output power of the amplifier to protect speakers from damage caused by an excessive sound level. Both AGC functions are adjustable.

The NCP2824 employs a single-wire interface to simplify designs. The NCP2704 meanwhile, offers extensive control through an I²C protocol for adapting the AGC, signal multiplexing and the EMI reduction level to meet system requirements.

ON Semiconductor’s new NCP380 and NCP382 are respectively single input / single output and single input / dual output, current limiting distribution switches designed for use in USB ports where heavy capacitive loads and short-circuits are likely to be encountered. Typical end applications include laptop/desktop computers, hubs, set top boxes, televisions and gaming products. The new devices limit output current to a desired level by switching into a constant−current mode when the output load exceeds the current−limit threshold or a short is present. The power switches’ rise and fall times are controlled to minimize current ringing during switching. More critically, very short detection times allow huge inrush currents to be limited.

The NCP382 incorporates two 80 milliohm (mΩ) MOSFETs, is available in either DFN8 3 mm x 3 mm or SOIC-8 packages and has a current limit threshold that is internally fixed at 500 milliamps (mA), 1000 mA or 1500 mA. The NCP380 meanwhile incorporates a single 70 mΩ MOSFET and is offered in a choice of UDFN6, TSOP-5, or TSOP-6 packages. Current limit threshold is again fixed at 500 mA, 1000 mA or 1500 mA or is user adjustable via an external resistor between 100 mA and 1.5 A.

The NCP380 and NCP382 have a 2.5 volt (V) to 5.5 V operating voltage range and include features such as soft-start, soft turn-off, thermal protection, and reverse voltage protection. Both devices are compliant with IEC61000-4-2 (level 4) and have a junction operating temperature range of -40 °C to+125 °C.

Portable and Consumer Sector Demonstrations at Electronica
In the portable and consumer areas of the company’s stand - where low power, efficiency, and size are especially important aspects of customers’ new product designs - ON Semiconductor will exhibit a selection of its fully integrated, high efficiency, small form factor devices that support audio and power management in the rapidly growing battery powered portable equipment sector.

Visit ON Semiconductor at Electronica 2010, 9 – 12 November, Hall A5, Stand 225.

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关于安森美半导体
安森美半导体(ON Semiconductor,美国纳斯达克上市代号:ONNN)致力于推动高能效电子的创新,使客户能够减少全球的能源使用。公司全面的高能效电源和信号管理、逻辑、分立及定制方案阵容,帮助工程师解决他们在汽车、通信、计算机、消费电子、工业、LED照明、医疗、军事/航空及电源应用的独特设计挑战。公司运营敏锐、可靠、世界一流的供应链及品质项目,及在北美、欧洲和亚太地区之关键市场运营包括制造厂、销售办事处及设计中心在内的业务网络。更多信息请访问http://www.onsemi.cn

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安森美半导体和安森美半导体图标是 Semiconductor Components Industries, LLC的注册商标。所有本文中出现的其它品牌和产品名称分别为其相应持有人的注册商标或商标。虽然公司在本新闻稿提及其网站,但此稿并不包含其网站中有关的信息。