HT6845CR [HEROIC]
HT6845 Brief Introduction;HT6845
HT6845产品简介
HT6845 Brief Introduction
中文版 (2-3页)
English Version (Page 4 - 6)
版权所有©2011, 嘉兴禾润电子科技有限公司
-1-
03/2011 – V1.0
HT6845
3.4W低EMI防削顶单声道免滤波D类音频功率放大器
特点
概述
HT6845是一款低EMI的,防削顶失真的,单声
・防削顶失真功能(Anti-Clipping Function, ACF)
・优异的全带宽EMI抑制性能
・免滤波器数字调制,直接驱动扬声器
道免滤波D类音频功率放大器,在5V电源,10%
THD+N,4ꢀ负载条件下,输出3.4W高功率,在手机
终端应用中(平均功率100mW左右)维持高效率并
提供AB类放大器的性能。
・高输出功率(WLCSP)
3.4 W×1ch (VDD=5.0V, RL=4Ω, THD+N=10%)
0.9 W×1ch (VDD=3.6V, RL=8Ω, THD+N=10%)
・高效率(WLCSP)
91% (VDD=5.0V, RL=8Ω, Po=1W)
88% (VDD=3.6V, RL=8Ω, Po=600mW)
78% (VDD=3.6V, RL=8Ω, Po=100mW)
・卓越的“咔嗒-噼噗”(Click-Pop)噪声抑制性能
・高信噪比SNR:95dB (VDD=3.6V, Av=18dB)
・低关断电流:0.01µA
・内置18dB恒定增益
・过流保护功能
HT6845的最大特点是防削顶失真(ACF)输出
控制功能,可检测并抑制由于输入音乐、语音信号幅
度过大所引起的输出信号削顶失真(破音),也能自
适应地防止在电池应用中由电源电压下降所造成的
输出削顶,显著提高音质,创造非常舒适的听音享受,
并保护扬声器免受过载损坏。针对不同音源应用,防
削顶具有ACF-1和ACF-2两种模式,以达到最佳音
效,同时芯片也提供了ACF-Off模式。
HT6845具有独有的电磁辐射(EMI)抑制技术
和优异的全带宽低辐射性能,辐射水平在不加任何辅
助设计时仍远在FCC Part15 Class B 标准之下,不
仅避免了干扰其他敏感电路还降低了系统设计难度。
・过热保护功能
・欠压异常保护功能
・无铅封装,1.45mmx1.6mm WLCSP-9
HT6845内部集成免滤波器数字调制技术,能够
直接驱动扬声器,并最大程度减小脉冲输出信号的失
真和噪音,在同类的移动产品应用中,其极低的失真
和噪声指标位列同类前列。输出无需滤波网络,极少
的外部元器件节省了系统空间和成本,是便携式应用
的理想选择。
应用
・手机,移动电话
・掌上电脑PDAs
・导航仪GPS
・PMP/MP4播放器
・便携式游戏机
・便携式音箱
・USB音箱
・iphone, MP3/4 docking
・数码相框
此外,HT6845内置的关断功能使待机电流最小
化,还集成了输出端过流保护、片内过温保护和电源
欠压异常保护等功能。
典型应用图
CS
1µF
VDD
CIN IN+
OUT+
OUT-
EMI抑制
+
数字
PWM
调制器
33nF
前置
放大
差分
输入
CIN IN-
33nF
输出驱动
RCTRL1
CTRL1
载波
OCP
CTRL
VREF
ACF
数字控制
CTRL2
RCTRL2
发生器
CCTRL
0.1µF
OTP
RCTRL3
关断
控制
HT6845
CR
1µF
UVLO
AGND
PGND
版权所有©2011, 嘉兴禾润电子科技有限公司
-2-
03/2011 – V1.0
HT6845
引脚分布图
IN+
VDD
OUT+
A
AGND
VREF
PGND
B
IN-
CTRL
OUT-
C
1
2
3
9焊球WLCSP 底视图
订购信息
H
T
6
8
4
5
X
X
包装和供货形式
封装形式
工作温度范围
(扩展工业级)
产品型号
HT6845CR
封装形式
顶面标记
包装和供货形式
卷带装
6845
XXXXXX *1
WLCSP-9
-40℃~85℃
3000颗/盘
*1:XXXXXX为内部生产跟踪随机编码
嘉兴禾润电子科技有限公司
地址: 浙江省嘉兴市亚太路 JRC 大厦 A 座三层
电话: 0573-82583866 82585565
传真: 0573-82585078
E-mail: sales@heroic.com.cn
网址: www.heroic.com.cn
版权所有©2011, 嘉兴禾润电子科技有限公司
-3-
03/2011 – V1.0
HT6845
3.4W Low-EMI Anti-Clipping
Mono Class D Audio Power Amplifier
FEATURES
GENERAL DESCRIPTION
HT6845 is a low-EMI, Anti-Clipping, filter-less,
monaural Class D power amplifier with an output
power of 3.4W. It has a high efficiency for mobile
applications with Class AB amplifier performance.
・Anti-Clipping Function(ACF)
・Excellent EMI Suppression Performance
・Optimized PWM Output Stage Eliminating LC
Output Filter
・Maximum Output
HT6845 features Anti-Clipping Function (ACF)
which detects and suppresses output signal
clippings due to the over level inputs of music or
voice signals. The ACF function also can adapt the
output clippings caused by power supply voltage
down in battery applications. It improves acoustical
quality considerably, gives great listening
enjoyment, and prevents speaker from overload
damaging. According to different audio sources,
two modes, ACF-1 and ACF-2, could be selected to
achieve a best audio performance.
3.2 W×1ch (VDD=5.0V, RL=4ꢀ, THD+N=10%)
0.9 W×1ch (VDD=3.6V, RL=8ꢀ, THD+N=10%)
・Efficiency
91% (VDD=5.0V, RL=8ꢀ, Po=1W)
88% (VDD=3.6V, RL=8ꢀ, Po=600mW)
78% (VDD=3.6V, RL=8ꢀ, Po=100mW)
・Excellent Click-Pop Noise Reduction Function
・High S/N Ratio, 95dB (VDD=3.6V, Av=18dB)
・Low Shutdown Current, 0.01µA
・Internal Fixed Gain of 8 V/V (18dB)
・Over-Current Protection Function
・Thermal Protection Function
・Low Voltage Malfunction Prevention Function
・ Pb-Free Packages, 1.45mmx1.6mm 9-ball
WLCSP
HT6845 has excellent EMI radiation suppression
characteristics, well below the FCC Part15 Class B
standards, simplifying system design and lowering
system cost.
HT6845 has a filter-less modulation circuit which
directly drives speakers, realizes highest standard
low distortion and low noise characteristics among
digital amplifier ICs for mobile use. Thanks to
filter-less, circuit design with fewer external parts
can be made in portable applications.
APPLICATIONS
・Mobile phones, iPhone, Mp3/Mp4 docking
・PDAs, GPS, Digital Photo Frame
・PMP/MP4 players, Portable Gamers
・Portable Speakers, USB Speakers
HT6845 has shutdown mode, over-current
protection, over-temperature protection and low
supply voltage malfunction preventing function.
HT6845 is available in WLCSP-9 package.
Copyright©2011, Jiaxing Heroic Technology Co., Ltd
-4-
Mar. 2011 V1.0
HT6845
TYPICAL APPLICATION
CS
1µF
VDD
CIN IN+
33nF
OUT+
OUT-
EMI
Suppression
&
Digital
PWM
Modulator
Pre-
Amplifer
Differential
Input
CIN IN-
33nF
Output
Driver
PGND
RCTRL1
CTRL1
ACF
Digital
Control
Carrier
Generator
OCP
CTRL
VREF
CTRL2
RCTRL2
CCTRL
0.1µF
OTP
RCTRL3
Shutdown
Control
HT6845
CR
1µF
UVLO
AGND
TERMINAL CONFIGURATION
IN+
VDD
OUT+
A
AGND
VREF
PGND
B
IN-
CTRL
OUT-
C
1
2
3
9-Pin WLCSP Bottom View
Copyright©2011, Jiaxing Heroic Technology Co., Ltd
-5-
Mar. 2011 V1.0
HT6845
ORDERING INFORMATION
H
T
6
8
4
5
C
R
Shipping Package
Package type
Operating
Temperature
Range
Package
Type
MOQ/Shipping
Package
Part Number
Marking
HT6845
Paper bags
3000 PCS/Plate
HT6845CR
WLCSP-9
-40℃~85℃
XXXXXX*1
Note *1:XXXXXX is the production track code.
Jiaxing Heroic Technology Corporation, Limited
Add:
Tel:
Fax:
A 3rd floor, JRC Building, Yatai Road, Jiaxing, Zhejiang Province
0573-82583866 82585565
0573-82585078
E-mail: sales@heroic.com.cn
Web: www.heroic.com.cn
Copyright©2011, Jiaxing Heroic Technology Co., Ltd
-6-
Mar. 2011 V1.0
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