IML6602 —— The 60W Stereo Class-D Audio Power Amplifier Integrated Circuit

The domestic simulation amplifier chip IML660 is an efficient stereo -type audio power amplifier.Under the high -efficiency mode (HEM), it has extremely low idle power loss and helps extend the life of the battery.Its high -efficiency characteristics enable it to support 2 × 30W power output without an external radiator on the double -layer PCB.The device can also provide parallel BTL applications, which can provide 60W power for 4Ω load under 24V power supply voltage.The high efficiency and reliability of IML6602 can effectively improve the performance and stability of the entire audio system. It is outstanding in the fields of home theater, professional audio, and car audio.

IML6602 uses the switching frequency option 300-kHz and 350K+-15% SSM to reduce the electromagnetic interference (EMI), and achieve the function of multiple devices synchronized by the main and slave options.It supports two modes of BTL and PBTL, with a power supply voltage range of 4.5V to 26V.Under the dual -channel BTL mode, the power of 2 × 30W can be output (8Ω, 24V, THD+N = 0.1%); in a single channel PBTL mode, it can output 60W power (4Ω, 24V, THD+N = 0.1%), And no heat sink, PIN-TO-PIN is compatible with Ti TPA3110 to adapt to various audio application scenarios.

This chip has a built -in protective function, including over -temperature protection, over current protection and short -circuit protection to ensure the stability and safety of the system.At the same time, it also supports DC bias and AC coupling input methods to meet different audio input requirements.IML6602 uses HTSSOP-32 packaging, has a new high-efficiency modulation mode (HEM) and EMI suppression technology. It has MUTE+ spread+ 2.1 channel synchronization+ frequency jump.The signal -to -noise ratio of up to 109, more accurate, and smaller frequency, only 1.5 disorders, small opening/ shutdown noise, static current of 224, and very small turnover current and drive resistance.

The characteristics of IML6602 include: input power supply voltage range is 4.5V to 26V; supports large output power, such as 2 × 30W into 8Ω BTL load (24V), 1 × 60W enters 4Ω PBTL load (24V);High -efficiency mode, recommended LC filter); high power efficiency, up to 94%; the idle power loss in the high -efficiency mode is extremely low and does not affect THD performance; low output offset voltage is 1.5mV;Low THD, 0.01%@1W@8OHM@24V; with 300-kHz and 350K+-15% SSM switching frequency; support the mainstay synchronization and programmable power limit;, Short -circuit and error reporting, overvoltage and overvoltage protection (UVLO and OVP), and thermal closing (OTP).

The working principle of class D amplifier is: the triangular wave signal of the sine -string Boeing input signal and frequency is much higher than its triangle wave signal to modulate it through the comparator, and the PWM modulation signal that is proportional to the input signal amplitude is obtained.The PWM modulation signal promotes the output power tube work in the switch state, and obtains the output signal with unchanged duty cycle on the output end of the power tube. The signal amplitude is the power supply voltage and has a strong current driving capacity.After the signal modulation, the output signal contains both the base wave component of the input signal and the modulation triangular wave, and also their high -level harmonic waves affect their combination.After the LC low -pass filtering, the high -frequency component in the output signal is filtered out, and the load obtains a low -frequency signal with the same frequency as the original audio signal and amplification.