FT2923 G类2*4.5W双声道功放IC
更新：2015-12-01 10:36 编号：4097498 IP：183.12.167.159 浏览：349次
- 供应商
- 深圳市联盈首锐科技有限公司 商铺
- 认证
- 资质核验：已通过营业执照认证入驻顺企：第11年主体名称：深圳市联盈首锐科技有限公司组织机构代码：440301103161056
- 报价
- 人民币￥.01元每PCS
- 品牌
- 方泰
- 型号
- FT2923
- 所在地
- 深圳市宝安区西乡街道宝安互联网产业基地海滨新村18栋二楼2012
- 联系电话
- 0755-89814686
- 联系人
- 冯小姐 请说明来自顺企网，优惠更多
- 让卖家联系我
产品详细介绍
GENERAL DESCRIPTION
The ft2923 is a highly
efficient 4.5W boosted Class-G
stereo audio power amplifier
with automatic level
control (ALC) and battery
tracking AGC. It integrates
dual filterless Class-D audio amplifiers with an
adaptive
Class-G synchronous boost regulator and operates
with a wide range of supply voltages from 3V to 5.25V.
When operating with 3.6V supply voltage, it can deliver
into a pair of 4Ω speakers at a maximum output power
of 4.5W per channel with 10% THD+N, or at an ALC
output power of 3.4W per channel.
In ft2923, the power supply rail of the audio
amplifier’s
output stages is internally boosted by a synchronous
PWM switching regulator with two integrated power
switches. The boost regulator employs current mode
PWM control with proprietary Class-G operation to
regulate the boosted voltage in response to the level of
audio outputs.
The ft2923 features ALC function to constantly monitor
audio outputs against the supply voltage applied to the
audio amplifier’s output stage, thus safeguarding
against output clipping distortion, excessive power
dissipation, and speaker over-load. Once an over-level
condition is detected in either channel, the ALC lowers
the voltage gain of both audio amplifiers proportionally
to eliminate output clipping.
In conjunction with ALC, the battery tracking AGC
lowers the voltage gain of the audio amplifiers to limit
the maximum audio outputs as the battery supply
voltage drops lower than a prescribed value, preventing
the collapse of battery voltage.
FEATURES
Wide supply voltage range from 3V to 5.25V
Filterless Class-D audio amplifier integrated with an
adaptive Class-G synchronous boost regulator
Automatic level control
Battery tracking AGC
Soft drive mode for EMI suppression
Maximum output power in Non-ALC mode
(VBAT=3.6V, ALC=High, 10% THD+N)
4.5W/Ch (4Ω load)
2.6W/Ch (8Ω load)
ALC output power in ALC Mode
(VBAT=3.6V, ALC=Low, 0.3% THD+N)
3.4W/Ch (4Ω load)
2.0W/Ch (8Ω load)
Wide ALC dynamic range: 12dB
Maximum voltage gain: 30dB
High efficiency up to 78%
Volume fade-in and fade-out
Under-voltage lockout protection
Auto-recovering over-current & short-circuit
protection
Thermal over-load protection
Available in TSSOP-28L package
APPLICATIONS
Blue Tooth Speakers
Portable Audio Speakers
Consumer Electronics
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