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HT6819
3.3W Ultra Low-EMI Anti-Clipping Stereo Class D Audio Power Amplifier with Digital Volume Control

HT6819 is an internal integrated 32-step digital volume control, ultra Low-EMI, Anti-Clipping stereo Class D audio power amplifier IC with maximum output power of 3.3W, providing high quality performance which compare favorably with AB class Amplifiers while the efficiency is much higher.

HT6819 has excellent EMI radiation suppression characteristics with AROC technology integrated, and is well below the FCC Part15 Class B standards without any filters (with a 20cm wire connecting to the speakers).

HT6819 features Anti-Clipping Function (ACF) which detects output signal clip caused by the over input signal or the voltage drops from battery, and suppresses the output signal clip automatically. It can significantly improves the sound quality, creating a very comfortable musical enjoyment, and to protect the speakers from overload damage. In addition the sound quality and output power can be freely set by external resistance or capacitance of ACRC.HT6819 also supply ACF OFF mode.

HT6819 has a “Pure Pulse Direct Speaker Drive Circuit” which directly drives speakers while reducing distortion of pulse output signal and reducing noise on the signal, and realizes the highest standard low distortion rate characteristics and low noise characteristics among digital amplifier ICs for portable use.

HT6819 has the independent Shutdown function which can minimize the power consumption at standby and MUTE function. As for protection function, over current protection function for speaker output terminals, over temperature protection function, and low supply voltage malfunction preventing function are also prepared.

HT6819 is available in Pb-Free TSSOP-20 package.


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FEATURES

  • Patented technology (EDMA) to reduce the internal Rdson and heat loss, increase the output power
    Po=3.3 W (VDD=5.0V, RL=4Ω, THD+N=10%)
    Po=1.7 W (VDD=3.6V, RL=4Ω, THD+N=10%)

  • Excellent EMI Suppression Performance
    a)   Using Patented technology (AROC, Active edge Ringing and Overshoot Control circuitry)
    b)   The emission level is highly lower than FCC Part15 Class B standard;
    c)   Without interference to FM radio, CMMB, GSM, CDMA, Bluetooth and any other sensitive modules with different bands;

  • 32 Step Digital Volume Control (DVC)

  • THD+N=0.15% (RL=4Ω, PO=1W, f=1kHz)

  • Low noise, High SNR

  • Anti-Clipping Function (ACF)

  • Excellent Click-Pop Noise reduction function

  • Low Shutdown Current, 0.01µA

  • Filter-less Modulation, Eliminating Output Filter

  • Independent Channel Power Down Function

  • Over Current Protection, Thermal Protection, Low voltage malfunction prevention function included

  • Pb-Free Package, TSSOP-20


APPLICATION


  • Small Size LCD TV/Monitors


  • Portable Speakers, USB Speakers, FM Speakers

  • MP3/MP4

  • Portable Gamers, Digital Photo Frame

  • Mobile Phone, Notebook PC

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TERMINAL FUNCTION*1 

Terminal No.

Name

I/O

Function

1

AGND

GND

GND for analog circuits

2

INL-

A

Negative input terminal (differential -) Lch

3

INL+

A

Positive input terminal (differential +) Lch

4

ACRC

I/O

Anti-clipping control terminal

5

OUTL+

O

Positive output terminal (differential +) Lch

6

PVDD

Power

Power supply for output

7

PGND

GND

GND for output

8

OUTL-

O

Negative output terminal (differential -) Lch

9

MUTE

I

Mute control terminal

10

/SDL

I

Shut-down terminal for Lch

11

/SDR

I

Shut-down terminal for Rch

12

AVDD

Power

Power supply for analog circuits

13

OUTR-

O

Negative output terminal (differential -) Rch

14

PGND

GND

GND for output

15

PVDD

Power

Power supply for output

16

OUTR+

O

Positive output terminal (differential +) Rch

17

DN

I

Volume down

18

INR+

A

Positive input terminal (differential +) Rch

19

INR-

A

Positive input terminal (differential +) Rch

20

UP

I

Volume up

*1     I: Input terminal   O: Output terminal   A: Analog terminal