The CS35L00 is a 2.7 W high efficiency Hybrid Class-D audio amplifier with low idle current consumpTIon and a selectable gain.
The CS35L00 features an advanced closed-loop architecture to provide 0.02% THD + N at 1 W and -75 dB PSRR at 217 Hz.
A flexible Hybrid Class-D output stage offers four modes of operaTIon: Standard Class-D (SD) mode offers full audio bandwidth and high audio performance; Hybrid Class-D (HD) mode offers a substanTIal reducTIon in idle power consumption with an integrated Class-H controller; Reduced Frequency Class-D (FSD) mode reduces the output switching frequency, producing lower electromagnetic interference (EMI); and Reduced Frequency Hybrid Class-D (FHD) mode produces both the lower idle power consumption of HD mode and the reduced EMI benefits of FSD mode.
Requiring minimal external components and PCB space, the CS35L00 is available in a 3.0 mm x 3.0 mm, 10-pin DFN package in Commercial grade (-10 ℃ to + 70 ℃).
CS35L00 main features:
Filterless Hybrid Class-D Architecture
– <1 mA Quiescent Current
– 1 x 2.7 W into 4 ohm (10% THD + N)
– 1 x 2.1 W into 4ohm (1% THD + N)
– 1 x 1.6 W into 8 ohm (10% THD + N)
– 1 x 1.3 W into 8 ohm (1% THD + N)
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Advanced Delta-Sigma Closed-loop Modulation
– 98 dB Signal-to-Noise Ratio (A-Weighted)
– 0.02% THD + N @ 1 W (SD & HD Mode) ï´
Integrated Protection and Automatic Recovery for Output Short-circuit and Thermal Overload
Pin-compatible 9-ball WLCSP family for easy upgrade path
– CS35L01: +6 dB default Gain
CS35L03: +12 dB default Gain
Pop and Click Suppression
CS35L00 main applications:
Mobile Phones
Laptops / Netbooks
Portable Navigation Devices
Active Speakers
Portable Gaming
figure 1. CS35L00 block diagram
figure 2. CS35L00 SD and FSD mode typical connection block diagram
image 3. CS35L00 HD and FHD mode typical connection block diagram
Note: 3. The value of the capacitance connected to the LFILT + net should not exceed 4.7uF. Presence of a capacitance above 4.7uF will prevent proper HD and FHD operation.
2.7 W x 4 CS35L00 Amplifier Demo Board
The CDB35L00-X4 demonstrates the CS35L00 high-efficiency Hybrid Class-D audio amplifier. This demonstration board implements a four-channel, quad amplifier system that delivers 2.7 W per full-bridge channel into 4-ohm loads using a single +5 V supply .Differential audio inputs can easily be connected through the J10, J20, J30, and J40 headers. If desired, the gain can be adjusted through the optional input resistors. Component landings are available for an optional EMI output filter.
The CDB35L00-X4 can be configured to evaluate the four operational modes and two gain settings of the CS35L00 amplifier. Mode, Gain, and Shutdown control is available through the S1 switch. Hybrid control is vailable through the R13, R23, R33, and R43 resistors.
Figure 4. 2.7 W x 4 CS35L00 amplifier demo board outline drawing
Main features:
Contains 4 CS35L00 Hybrid Class-D Amplifiers
Selectable +6 dB or +12 dB Gain
Selectable Operational Modes
Device Shutdown Control
Delivers 2.7 W / Ch into 4ohm at 10% THD + N
Delivers 1.6 W / Ch into 8 ohm at 10% THD + N
Differential Mono Analog Inputs for each CS35L00 Amplifier
Demonstrates Recommended 4-Layer Layout and Grounding Arrangements
– Optional Output Filter Connections
– Optional Gain Adjustment Resistors
Powered by Single + 2.5-5.5 V Power Supply
Figure 5. Block Diagram of CDB35L00-X4 Amplifier Demo Board
Image 6. CDB35L00-X4 amplifier demo board circuit diagram
CDB35L00-X4 Amplifier Demo Board Bill of Materials (BOM):
Take a deep breath, close your eyes, the world has the freshest oxygen ... Yu Quan's "Deep Breath" is well known to us, but as the environmental problems become more and more serious, the haze sky also increases, PM2.5 PM10 and so on Vocabulary has also been mentioned more and more, and air purifiers have quickly become popular on the market with this "air quality" trend. Along with this, the air-clean brand has sprung up, and various technologies are dazzling. Which ones are indeed effective and which are just tasteless propaganda? How does the Air Purifier bother us to get rid of pollution? And look at the editors for you.
Analysis of air purifier
The critical value of PM2.5 content is 75 μg / m3
The pollutants in the air mainly include soot, total suspended particulates, inhalable particulates (PM2.5) and fine particulates (PM10). The smaller the diameter of the particulates, the deeper the part that can enter the respiratory tract. 10 micron diameter particles It is deposited in the upper respiratory tract, and particles below 2 microns can penetrate 100% into the bronchiole and alveoli.
1k-5k air purifier prices vary greatly
The air purifier products on the market not only have various functions, but also have prices ranging from thousand yuan to tens of thousands. The pricing of imported products is generally higher than that of domestic brands. Except for the core technology of many brands, the promotion of purification effects is similar, and consumers need to choose according to demand.
The air quality standard of 74 key cities is only 4.1%
According to the data of the press conference held by the State Council Information Office on June 4, according to the new "Ambient Air Quality Standards", the six pollutants SO2, NO2, PM10, PM2.5, CO and O3 were evaluated, 74 new standards In the first phase of monitoring and implementation, the proportion of cities that met the ambient air quality standards was only 4.1%, and the other 256 cities implemented the old air quality standards, and the proportion of cities that met the standards was 69.5%.
Air purifier sales increased by 90.5% compared with last year
According to a report recently released by the China Electronics and Information Industry Development Institute, due to the haze weather, air purifiers have become the most concerned home appliance products, with sales of nearly 2.4 million units nationwide last year, a year-on-year increase of 90.5%; retail The amount reached 5.6 billion yuan, a year-on-year increase of 105.9%.
HEPA filter needs to be replaced in March
The filter of the air purifier is the same as the filter of the water purifier, and it is not effective for a long time. After long-term use, the accumulation of dust on the surface of the filter will also cause the filter to gradually fail. Therefore, when the haze is more serious, the non-washable HEPA filter needs to be replaced every three months.
Merchants claim that the purification rate is more than 99% for the concept of stealing
99% or even 99.99% seems to have become a slogan for many air purifiers on the market. Many brands of products promote their high removal rate of PM2.5 and formaldehyde. In fact, this kind of publicity is more of a kind. The slogan of stealing the concept, the removal rate of 99% is the effect of the material itself on PM2.5 and formaldehyde, not the effect of actually running in space.
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