The expected ICEPOWER 1200AS2 module finally arrives on the OEM market based on the new ICEedge technology (thanks to which the temperature, voltage and current of the amplifier is continuously monitored with the activation of a multi-layer alarm and protection system if the operating conditions are close at the protection limit). It is a module that combines a PFC type SMPS power supply with two high power and quality class D amplifiers. It does not require the addition of external interfaces since the buffer on board ensures an adequate input impedance. The aluminum base on which the PCB is mounted allows good heat dissipation without the need for the addition of heavy passive heat sinks.
Output power one channel driven: 1200W (4Ω), 600W (8Ω)
Output power two channel driven: 700W (4Ω), 600W (8Ω)
Distorsion THD + N (1W/1kHz) = 0.005 %
Minimum load impedance = 2.7 Ω
Dynamic range = 129db
SNR = 135db
Frequency Response 3hz-50Khz
Voltage Gain 25,8db
Input Impedance 38Kohm
Output idle noise (A) = 25mV
Maximum output current 38A
A Class D amplifier includes several secondary functions, such as analog comparators and high-precision operational amplifiers, high-voltage gate drivers and high-current MOSFETs, each with different requirements. Putting everything on one die is an important compromise because a semiconductor process simply can not be optimized for so many conflicting requirements. Instead, ICEpower used a highly sophisticated low noise and high precision process for the controller that contains all the sensitive analog parts in the signal chain, such as operational amplifiers, comparators, etc.
The ICEedge chipset consists of a dual-channel IC controller and two driver gate integrated circuits used in conjunction with external MOSFETs. This allows the scalability of power, which means that it is the only chipset on the market that can drive power amplifiers from 50 to 7000 watts (4Ω). ICEedge is perhaps the most advanced class-D chipset in the world. All relevant protection, diagnostics and maintenance functions are integrated into ICEedge for fast and easy amplifier development.
Dual mono design
In the audiophile community, it has long been regarded as best practice to completely separate independent channels in order to minimize interference and crosstalk between channels. In ICEedge, ICEpower has therefore done exactly this. The two channels are completely separated and with the physical layout being fully identical, hereby the dual mono design.
ICEpower has designed one of the most advanced protection systems ever in a class D amplifier. The protection system has been designed from a “music at all times” paradigm. Essentially this means that it is designed to keep the music playing as long as possible, even under extreme conditions, before it eventually has to shut down to avoid damage if the current or temperature is not reduced. The protection scheme in ICEedge includes early warning before shutdown, accurate and fast MOSFET temperature measurement and temperature-compensated cycle-by-cycle current limit. All features are unique and invented by ICEpower for ICEedge.
Continuous Dead-time compensation
The ICEedge driver provides an ICEpower proprietary Continuous Dead-time Compensation mechanism (CDC) that adds small continuous compensating adjustments to the gate driver output timing derived from the previously measured PWM switch timing. In other words, based on the actual timing of the power stage MOSFETs, the ICEedge driver will maintain the optimal timing of the full power stage and thus provide optimum low distortion properties.
By monitoring the amplifier’s conditions continuously, the risk of shutdown or damage is decreased dramatically as the system or user of the system has a chance to react before reaching critical levels. Therefore, ICEpower has integrated a simple interface allowing the possibility to read status and diagnostics information. This can be read either through logic levels on the pins of the chip or through the I2C interface.
APPLICAZIONI - APPLICATIONS
• High-end stereo and multi-channel amplifiers
• Active 2 and 3 way speakers
• Bass amplifiers
• PA speakers and line arrays