Next generation portable and consumer electronics (ON Semiconductor)
ON Semiconductor has introduced four new products designed to work with portable and consumer electronics applications.
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ON Semiconductor offers a broad range of power management, protection, audio and video solutions for portable and consumer applications. ON Semiconductor focuses on providing low integration, low power consumption and high energy efficiency in a low-profile, small footprint package to match current smartphones, personal media players (PMPs), digital cameras, LCD TVs, set-top boxes and DVD players. And the future demand for portable and consumer products.
Portable and consumer products from ON Semiconductor at the 2010 Munich Electronics Show
The NCP2704 Audio Subsystem IC and the NCP2824 Low Noise Class D Amplifier are the latest audio products from ON Semiconductor. Both devices provide an energy-efficient and space-saving solution for designers' portable power amplifier requirements.
The NCP2824 is a low electromagnetic interference (EMI) Class D amplifier with automatic gain control (AGC) and power limiter functionality. The NCP2704 is a subsystem that integrates a low-noise Class D amplifier with a very low-power headphone amplifier to extend battery life and extend audio playback time. Both devices offer nearly 90% total energy efficiency and are designed to cover a wide range of portable electronic devices such as mobile phones, mobile Internet devices and car kits.
Both devices offer a "non-clipping" function that automatically reduces the gain of the amplifier when an excessive signal is applied to the input, limiting signal distortion. This adjustment is achieved by the chip's built-in automatic gain control (AGC) circuitry. The power limiter function limits the output power of the amplifier and protects the speaker from damage caused by excessive volume. The automatic gain control of both devices can be adjusted.
The NCP2824 uses a single wire interface to simplify the design. The NCP2704 provides a rich set of control functions through the I2C protocol for provisioning automatic gain control, signal multiplexing, and electromagnetic interference (EMI) degradation levels to meet system requirements.
ON Semiconductor's new NCP380 and NCP382 are single-input/single-output and single-input/dual-output current-limit distribution switches designed for universal serial bus (USB) ports that are likely to have large capacitive loads and short circuits. Typical end applications include notebook/desktop computers, hubs, set-top boxes (STBs), televisions, and gaming consoles. When the output load exceeds the current-limit threshold or a short circuit occurs, the two new devices switch to constant-current mode, limiting the output current to the desired level. The rise and fall times of these two power switches are controlled to minimize current ringing during switching. More importantly, the extremely short detection time allows the device to limit the maximum input current.
The NCP382 integrates two 80 milliohm (mΩ) MOSFETs in a DFN8 3 mm x 3 mm or SOIC-8 package with an internal current limit of 500 milliamps (mA), 1,000 mA, or 1,500 mA. NCP380 is incorporated into a single
70 mΩ MOSFET with different package options such as UDFN6, TSOP-5 or TSOP-6. The NCP380's current-limit threshold is also fixed at 500 mA, 1,000 mA, or 1,500 mA, or it can be adjusted by the user through an external resistor from 100 mA to 1.5 A.
The NCP380 and NCP382 operate from 2.5 V to 5.5 V and include soft-start, soft-off, thermal protection, and reverse voltage protection. Both devices are compliant with IEC61000-4-2 (Class 4) and have junction operating temperatures ranging from -40°C to +125°C.
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Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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