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01-18-2011, 02:15 AM
Black appliances usually refers to the output with audio and video appliances.
primary energy consumption of these appliances are located in the terminal display area, which is used to view the display and used to listen to the speakers.
With increasing screen size, audio output wattage increases, the power problem can not be underestimated.
how the same audio output power and screen size the same case size, to maximize energy savings, energy efficiency is the key to black appliances.
in a recent exhibition held in IIC 2007, Power Analog Microelectronics showcase their latest filterless Class D audio power amplifier and LED driver IC series of PAM8803, audio and video from two angles a perfect interpretation of black energy saving appliances the new concept.
D amplifier will replace Class AB amplifier
And compared with normal AB class amplifiers, D amplifier's efficiency can be more than 3 times higher.
This makes it an important measure for the black one energy-saving appliances. Power Analog Microelectronics
Mao Hai, chief scientist pointed out that the audio amplifier is in revolution, the amplifier to switch from analog amplifiers into the trend will be unstoppable.
However, D amplifier, a major drawback is the need to external low-pass filter to filter out high-frequency square-wave switching.
not only increase the cost but also increase the PCB board area, while increasing the electromagnetic interference.
remove the low-pass filter in the case of static to keep a low point current of such products is undoubtedly a design challenge.
For example, the use of low-pass filter D amplifier the quiescent current is about 20-40mA; and when the filter is not used as much as the static point current of about 200mA.
Power Analog Microelectronics
latest filterless Class D audio power amplifier PAM8803 is the company has fully independent intellectual property rights of a product, no filter is its static point current case is only 5-6mA per channel.
As the amplifier output without low-pass filter, thus saving four inductors, four capacitors, 75% reduced PCB area, reducing about 30% of the cost.
at 5V supply voltage, you can 3W audio output power, when the supply voltage as low as 2V, can have a large enough output power, the characteristics that make it very suitable for battery-powered products.
the output power of 1-2W, its THD + N as low as 0.3%.
PAM8803 the EMI is very low, consistent with the United States FCC Class B standards.
In addition, the product integrates 64-step digital volume control, eliminating the need for external volume control chips, further reducing costs.
Mao Yu said, this similar products than TI's nearly 50% cheaper, it has a large cost advantage.
same time, he said, and now AB Class D amplifier prices are still high compared to the only shipments to a higher level, the cost to a minimum. Power Analog Microelectronics
currently has applied for the patent in the United States,LED Message Board (http://advertisingsigns.blog.com/), and will soon apply for a patent in China.
Led backlight large number of popular Urgent
The other hand, LCD TVs, the current screen's backlight and are based CCFL (cold cathode fluorescent tube) as a backlight. If the use of LED backlighting
can also save a lot of power.
Power Analog Microelectronics has developed a series of LED driver IC,led sign (http://www.flashingboards.com/Neon-LED-Boards-pc-32.html), the PAM2701 has now entered mass production mobile phone or PMP is used to drive the LCD screen backlight LED, which is a charge pump chip, only plus 4 ordinary low-cost ceramic capacitors can work.
most, it can drive up to 30mA forward current of 4 of the LED, and to ensure that each group was less than 3% of current required by the three light up the LED control lines to select.
it can work in the lithium battery voltage is higher than the LED forward voltage, you can also work in the lithium battery voltage is lower than the LED forward voltage, and can automatically switch its mode.
up to 91% of its maximum efficiency.
More power to drive the 3W LED, Power Analog Microelectronics has developed a step-PAM2801.
chip 1 can be a battery,custom signs (http://www.flashingboards.com/Neon-LED-Boards-pc-32.html), two One battery, or the use of solar batteries, light a 1W or 3W of LED, the feedback voltage is only 95mV, the maximum output current up to 1A, the highest efficiency up to 90%.
Mao pointed out in the sea, LED display of color and temperature is closely related to temperature change will affect its color display, so there are still many difficulties in the design.
But he also admitted that China's home appliance manufacturers are still in the competition phase of low-level of price competition will not take the initiative in energy-saving measures, energy-efficient black appliances so the key is to take steps by the government, the development of relevant laws and regulations.
Of: Chen Jin Jin
primary energy consumption of these appliances are located in the terminal display area, which is used to view the display and used to listen to the speakers.
With increasing screen size, audio output wattage increases, the power problem can not be underestimated.
how the same audio output power and screen size the same case size, to maximize energy savings, energy efficiency is the key to black appliances.
in a recent exhibition held in IIC 2007, Power Analog Microelectronics showcase their latest filterless Class D audio power amplifier and LED driver IC series of PAM8803, audio and video from two angles a perfect interpretation of black energy saving appliances the new concept.
D amplifier will replace Class AB amplifier
And compared with normal AB class amplifiers, D amplifier's efficiency can be more than 3 times higher.
This makes it an important measure for the black one energy-saving appliances. Power Analog Microelectronics
Mao Hai, chief scientist pointed out that the audio amplifier is in revolution, the amplifier to switch from analog amplifiers into the trend will be unstoppable.
However, D amplifier, a major drawback is the need to external low-pass filter to filter out high-frequency square-wave switching.
not only increase the cost but also increase the PCB board area, while increasing the electromagnetic interference.
remove the low-pass filter in the case of static to keep a low point current of such products is undoubtedly a design challenge.
For example, the use of low-pass filter D amplifier the quiescent current is about 20-40mA; and when the filter is not used as much as the static point current of about 200mA.
Power Analog Microelectronics
latest filterless Class D audio power amplifier PAM8803 is the company has fully independent intellectual property rights of a product, no filter is its static point current case is only 5-6mA per channel.
As the amplifier output without low-pass filter, thus saving four inductors, four capacitors, 75% reduced PCB area, reducing about 30% of the cost.
at 5V supply voltage, you can 3W audio output power, when the supply voltage as low as 2V, can have a large enough output power, the characteristics that make it very suitable for battery-powered products.
the output power of 1-2W, its THD + N as low as 0.3%.
PAM8803 the EMI is very low, consistent with the United States FCC Class B standards.
In addition, the product integrates 64-step digital volume control, eliminating the need for external volume control chips, further reducing costs.
Mao Yu said, this similar products than TI's nearly 50% cheaper, it has a large cost advantage.
same time, he said, and now AB Class D amplifier prices are still high compared to the only shipments to a higher level, the cost to a minimum. Power Analog Microelectronics
currently has applied for the patent in the United States,LED Message Board (http://advertisingsigns.blog.com/), and will soon apply for a patent in China.
Led backlight large number of popular Urgent
The other hand, LCD TVs, the current screen's backlight and are based CCFL (cold cathode fluorescent tube) as a backlight. If the use of LED backlighting
can also save a lot of power.
Power Analog Microelectronics has developed a series of LED driver IC,led sign (http://www.flashingboards.com/Neon-LED-Boards-pc-32.html), the PAM2701 has now entered mass production mobile phone or PMP is used to drive the LCD screen backlight LED, which is a charge pump chip, only plus 4 ordinary low-cost ceramic capacitors can work.
most, it can drive up to 30mA forward current of 4 of the LED, and to ensure that each group was less than 3% of current required by the three light up the LED control lines to select.
it can work in the lithium battery voltage is higher than the LED forward voltage, you can also work in the lithium battery voltage is lower than the LED forward voltage, and can automatically switch its mode.
up to 91% of its maximum efficiency.
More power to drive the 3W LED, Power Analog Microelectronics has developed a step-PAM2801.
chip 1 can be a battery,custom signs (http://www.flashingboards.com/Neon-LED-Boards-pc-32.html), two One battery, or the use of solar batteries, light a 1W or 3W of LED, the feedback voltage is only 95mV, the maximum output current up to 1A, the highest efficiency up to 90%.
Mao pointed out in the sea, LED display of color and temperature is closely related to temperature change will affect its color display, so there are still many difficulties in the design.
But he also admitted that China's home appliance manufacturers are still in the competition phase of low-level of price competition will not take the initiative in energy-saving measures, energy-efficient black appliances so the key is to take steps by the government, the development of relevant laws and regulations.
Of: Chen Jin Jin