HT4832 / HT4831 is a stereo headphone amplifier that eliminates the need for external dc-blocking output capacitors.
HT4832 / HT4831 features stereo inputs that can be set in either differential or single-ended input. 4 different gain with different built-in resistors reducing external component is selectable.
HT4832 / HT4831 drives 33mW into 32ohm speakers/headphone from a 3.6V supply. THD+N is 0.014% low.
HT4832 / HT4831 operates from a single 2.5V to 5.5V supply with 3.6mA of typical supply current. Shutdown mode reduces supply current to less than 1μA.
Thermal-overload protection, low voltage malfunction prevention function is integrated in HT4832 / HT4831.
Features
| Application
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TERMINAL CONFIGURATION
Pin No. | Pin Name | I/O | Pin Description | |
HT4832 | HT4831 | |||
1 | 1 | INL- | I | Inverting left input for differential signals; left input for single-ended signals |
2 | 2 | INL+ | I | Non-inverting left input for differential signals. Connect to ground for single-ended input applications |
3 | 3 | INR+ | I | Non-inverting right input for differential signals. Connect to ground for single-ended input applications |
4 | 4 | INR- | I | Inverting right input for differential signals; right input for single-ended signals |
5 | 7 | OUTR | O | Right headphone amplifier output. Connect to right terminal of headphone jack |
6 | 5 | G0 | I | Gain select |
7 | 6 | G1 | I | Gain select |
8 | 8 | HPVSS | P | Charge pump output and negative power supply for output amplifiers; connect 2.2μF capacitor to GND |
9 | 10 | CAP- | P | Charge pump negative flying cap. Connect to negative side of 2.2μF capacitor between CP+ and CP- |
10 | 9 | PGND | P | Ground |
11 | 11 | CAP+ | P | Charge pump positive flying cap. Connect to positive side of 2.2μF capacitor between CP+ and CP- |
12 | 13 | HPVDD | P | Positive power supply for headphone amplifiers. Connect to a 2.2μF capacitor. Do not connect to PVDD |
13 | 16 | EN | I | Amplifier enable. Connect to logic low to shutdown; connect to logic high to activate |
14 | 12 | PVDD | P | Positive power supply |
15 | 15 | SGND | I | Amplifier reference voltage. Connect to ground terminal of headphone jack |
16 | 14 | OUTL | O | Left headphone amplifier output. Connect to left terminal of headphone jack |
I: Input Terminal O: Output Terminal P: Power/Ground