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HT4832
33mW CAP FREE STEREO HEADPHONE AMPLIFIER

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.


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Features

  • No Need for DC-Blocking Capacitors

    - Outputs Biased at 0V
    - Excellent Low Frequency Fidelity

  • 3.6mA Typical Supply Current

  • Low Standby Current: 0.1μA

  • Differential or Single-Ended Inputs

    - Built-In Resistors Reduces Component Count

  • - Improves System Noise Performance

  • Low THD+N: 0.014% (3.6V, 32ohm, 20mW)

  • Output Power: 33mW (PVDD=3.6V, RL=32Ω, THD+N=1%)

  • Power Supply: 2.5V-5.5V

  • Gain Setting: -6/0/3/6 dB

  • Thermal-Overload and Low Voltage Malfunction Prevention Function

  • Pb-Free, Small Package available
    -QFN163m*3m


Application

  • Bluetooth headset          

  • Smart phone

  • Portable speaker    

  • Tablet/Notebook

  • CD/MP3             

  • Portable Gaming


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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