HT6808
3W Ultra Low-EMI Anti-Clipping
Stereo Class D Audio Power Amplifier
FEATURES
GENERAL DESCRIPTION
HT6808 is a Ultra Low-EMI Anti-Clipping stereo
Class D audio power amplifier IC with maximum
output power of 3W,efficiency up to 90%.
・Anti-Clipping Function(ACF)
・Excellent EMI Suppression Performance
・Optimized PWM Output Stage Eliminating LC
Output Filter
HT6808 features Anti-Clipping Function (ACF)
which detects output signal clip due to the over
input signal and suppresses the output signal clip
automatically. Also the ACF function can adapt the
output clip caused by power supply voltage down
with battery . It can significantly improves the
sound quality, creating a very comfortable musical
enjoyment, and to protect the speakers from
overload damage. In addition Sound quality and
output power can be freely set by external
resistance or capacitance of ACRC.HT6808 also
supply ACF OFF mode.
・Maximum Output
3.0 W×2ch (VDD=5.0V, RL=4ꢀ, THD+N=10%)
1.9 W×2ch (VDD=5.0V, RL=8ꢀ, THD+N=10%)
・Efficiency
85%@VDD=5.0V, RL=4ꢀ, Po=1W
・Low THD+N
0.1%@ VDD=5.0V, RL=4ꢀ, Po=1W
・Channel separation
80dB@fIN=1kHz, Av=18dB
・High S/N Ratio
90dB@ VDD=5.0V, Av=18dB
・Excellent Click-Pop Noise Reduction Function
・MUTE Function
・Independent Channel Power Down Function
・Over-Current Protection Function, Thermal
Protection Function
・Low Voltage Malfunction Prevention Function
・Pb-Free Package, TSSOP-20, QFN-20
HT6808 has excellent EMI radiation suppression
characteristics, well below the FCC Part15 Class B
standards, simplifying system design and lowering
system cost.
HT6808 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.
APPLICATIONS
・Portable Speakers, USB Speakers, FM Speakers
・MP3/MP4
・Portable Gamers, Digital Photo Frame
・Mobile Phone, Notebook PC
・Small Size LCD TV/Monitors
HT6808 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.
HT6808 is available in Pb-Free TSSOP-20 and
QFN-20 package.
Copyright©2011, Jiaxing Heroic Technology Co., Ltd
-4-
Mar. 2011 V1.0