HT2144 datasheet(4/5 Pages) HEROIC

4 / 5 page

HT2144

-4-

Mar. 2011 V1.0

2.1W Non-Clip Stereo Class D Audio Power Amplifier

FEATURES

・

Maximum output

2.1 W×2ch (VDDP=VDDA=5.0V, RL=4Ω)

0.75 W×2ch (VDDP=VDDA=3.6V, RL=8Ω)

・

Distortion Rate (THD+N)

0.03%(VDDP=VDDA=3.6V, RL=8Ω, Po=0.4W,1kHz)

・

Residual Noise

40μVrms (VDDP=VDDA=3.6V, Av=12dB)

・

Efficiency

84 % (VDDP=VDDA=3.6V, RL=8Ω, Po=600mW)

78 % (VDDP=VDDA=3.6V, RL=8Ω, Po=100mW)

・

S/N Ratio

95dB (VDDP=VDDA=3.6V, Av=12dB)

・

Channel separation

95dB (VDDP=VDDA=3.6V, RL=8Ω, Av=18dB, 1kHz)

・

Over-current Protection function

・

Thermal Protection function

・

Low voltage Malfunction Prevention function

・

2ch independent power-down control function

・

Power-down High speed Recovery function

・

Package

Lead-free 20-pin QFN

Lead-free 20-pin TSSOP

・

Pb-Free Package, TSSOP-20, QFN-20

APPLICATIONS

・

Portable Speakers, USB Speakers, FM Speakers

・

MP3/MP4

・

Portable Gamers, Digital Photo Frame

・

Mobile Phone, Notebook PC

・

Small Size LCD TV/Monitors

GENERAL DESCRIPTION

HT2144 is a digital audio power amplifier IC with

maximum output of 2.1W (RL=4Ω)×2ch.

HT2144 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 mobile use.

In addition, circuit design with fewer external parts

can be made depend on the condition of use

because corresponds to filter less.

The HT2144 features Heroic original non-clip

output control function which detects output signal

clip due to the over level input signal and suppress

the output signal clip automatically. Also the

non-clip output control function can adapt the

output clip caused by power supply voltage down

with battery. This is the difference from the

traditional AGC (Auto Gain Control) or ALC (Auto

Level Control) circuit. Attack time and release time

can be freely set by external resistances or

capacitances.

The independent power-down function for L

channel and R channel minimizes consumption

current at standby. As for protection function, over

current protection function for speaker output

terminal, over temperature protection function for

inside of the device, and low supply voltage

malfunction preventing function are prepared.

HT2144 Fiches technique(PDF) 4 Page - Jiaxing Heroic Technology Co.,Ltd.

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