The HT4832 is a stereo headphone amplifier that does not require an output DC-blocking capacitor. The HT4832 supports differential and single-ended analog signal inputs and has four gain settings.
The PAM8908 is a 25MW stereo headphone driver designed for portable devices where board space is expensive. The PAM8908 uses a unique, patent-pending architecture that generates a ground-referenced output from a single power supply, eliminating the need for large DC blocking capacitors, saving cost, board space, and component height.
PAM8908 package.
YSM HT4832 package.
The PAM8908 delivers up to 25mW of power per channel in 16 loads with a THD+N low of 003%。A high power supply rejection ratio allows the device to operate on a noisy digital supply without the need for an additional linear regulator.
And the YSM HT4832 is in 3THD+N = 1% at 6V supply, 33MW output at 32ohm load. It has as low as 0014% THD+N.
PAM8908 from 25v to 55V single-supply operation with short-circuit and over-temperature protection. The shutdown mode reduces the supply current to less than 1UA.
YSM HT4832 can also be used in 25v-5.It operates from a 5V power supply, and also has functions such as overtemperature protection and undervoltage protection, and the HT4832 has a shutdown current as low as 01μa。
Typical application diagram of PAM8908 in the United States and Taiwan.
YSM HT4832 Typical Application Diagram.
HT4832 not only replaces PAM8908 in terms of performance and cost, but also is more cost-effective as a domestic chip - YSM HT4832.
Features of YSM HT4832::
There is no need for a large output DC-blocking capacitor.
0V potential as reference output;
Excellent low-end performance;
Quiescent current: 36ma (pvdd=3.6v, output=floating)
Shutdown Current: 01ua
Single-ended or differential inputs.
Built-in input resistors reduce the number of external components.
The system has excellent noise performance.
thd+n only: 0014% (3.6v, 32ohm, 20mw)
Power output: 33mW (PVDD=3.)6v, rl=32ω,thd+n=1%)
Single power supply: 25v-5.5v
Gain selectable: -6 0 3 6 dB
Protection function: overheating, undervoltage abnormal protection function.
Lead-free package, QFN16
YSM HT4832 Pin Definition.
YSM HT4832 Applications:
Bluetooth headphones. Smart n phone.
Audio. Tablet laptop.
cd/***
Portable game consoles.
HT4832 PAM8908 Diodes Diodes.