1 Introduction to HT4832
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With the advent of more and more portable audio devices such as smart phones, Bluetooth headsets, wireless microphones, etc., the design space of their boards is becoming less and less; the transmission of audio signals to headphones has always used huge DC blocking capacitors, not only It poses a big challenge to the board space and also has damage to the low-frequency part of the sound quality.
Shenzhen Yongkang Technology Co., Ltd. is based on Jiaxing Herun Electronics HT4832 Capacitor-free Class G Headphone Amplification Solution, does not require DC blocking capacitors, has an extremely compact BOM, and is available in a slim QFN16 lead-free and halogen-free package. Ideal for use in miniature portable audio equipment.
As a headphone driver chip, the HT4832 supports differential and single-ended analog signal inputs with four different gain settings (-6dB, 0dB, 3dB, 6dB), high signal-to-noise ratio and low distortion, and good Overheating, overvoltage, overcurrent protection, widely used in various audio equipment terminals.
The HT4832 can also be used as an audio operational amplifier for differential-to-single-ended, gain-compensated functions such as audio amplifiers.
The HT4832 is pin-to-pin compatible with the TPA6132, PAM8908, and is more prominent in terms of price, output power, distortion, and channel isolation.
2 HT4832 main indicators
No need to output a DC blocking capacitor with a bias of 0V
Excellent low frequency fidelity
Pop sound suppression
Fully differential or single-ended input
Wide supply voltage range: 2.3-5.5V
Output Power
Po = 46mW (THD+N = 1%, PVDD = 3.6V, RL = 16ohm, f = 1kHz);
Po = 99mW (THD+N = 1%, PVDD = 5.0V, RL = 16ohm, f = 1kHz);
Po = 33mW (THD+N = 1%, PVDD = 3.6V, RL = 32ohm, f = 1kHz);
Po = 68mW (THD+N = 1%, PVDD = 5.0V, RL = 32ohm, f = 1kHz).
Total harmonic distortion + noise
THD+N = 0.014% (Po = 20mW, PVDD = 3.6V, RL = 16ohm, f = 1kHz).
Quiescent Current
IDD = 3.6mA (PVDD = 3.6V).
Shutdown current
ISD = 0.1uA.
Signal to noise ratio
SNR = 96dB.
3 HT4832 Demo Board
Fig. 1 Schematic Diagram of HT4832 Demo Board
Table.1 HT4832 with Reduced Component Count (without input and output socket)
Fig.2 View of HT4832 Demo Board
Fig.3 Top View of HT4832 Demo Board PCB Layout
Fig.4 Bottom View of HT4832 Demo Board PCB Layout
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