SSM2311

更新时间： 2024-11-03 04:02:47

品牌	Logo	应用领域
亚德诺 - ADI		音频放大器
页数	文件大小	规格书
20页	525K
描述
Filterless High Efficiency Mono 3 W Class-D Audio Amplifier

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SSM2311 数据手册

Filterless High Efficiency

Mono 3 W Class-D Audio Amplifier

SSM2311

The SSM2311 features a high efficiency, low noise modulation

scheme that does not require any external LC output filters. The

modulation continues to provide high efficiency even at low output

power. It operates with 90% efficiency at 1.4 W into 8 Ω or 85%

efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR that

is better than 98 dB. Spread-spectrum pulse density modulation

is used to provide lower EMI-radiated emissions compared with

other Class-D architectures.

FEATURES

Filterless Class-D amplifier with Σ-Δ modulation

No sync necessary when using multiple Analog Devices, Inc.,

Class-D amplifiers

3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with

less than 10% total harmonic distortion (THD)

90% efficiency at 5.0 V, 1.4 W into 8 Ω speaker

Better than 98 dB signal-to-noise ratio (SNR)

Single-supply operation from 2.5 V to 5.5 V

20 nA ultralow shutdown current

Short-circuit and thermal protection

Available in 9-ball, 1.5 mm × 1.5 mm WLCSP

Pop-and-click suppression

Built-in resistors reduce board component count

Default fixed 18 dB or user-adjustable gain setting

The SSM2311 has a micropower shutdown mode with a typical

shutdown current of 20 nA. Shutdown is enabled by applying a

logic low to the

pin.

The device also includes pop-and-click suppression circuitry. This

minimizes voltage glitches at the output during turn-on and turn-

off, thus reducing audible noise on activation and deactivation.

APPLICATIONS

Mobile phones

MP3 players

Portable gaming

Portable electronics

Educational toys

The fully differential input of the SSM2311 provides excellent

rejection of common-mode noise on the input. Input coupling

capacitors can be omitted if the dc input common-mode voltage

is approximately V_DD/2.

The default gain of SSM2311 is 18 dB, but users can reduce the gain

by using a pair of external resistors (see the Gain section).

GENERAL DESCRIPTION

The SSM2311 is a fully integrated, high efficiency, Class-D audio

amplifier. It is designed to maximize performance for mobile

phone applications. The application circuit requires a minimum

of external components and operates from a single 2.5 V to 5.5 V

supply. It is capable of delivering 3 W of continuous output power

with less than 1% THD + N driving a 3 Ω load from a 5.0 V supply.

The SSM2311 is specified over the industrial temperature range

(−40°C to +85°C). It has built-in thermal shutdown and output

short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm

wafer level chip scale package (WLCSP).

FUNCTIONAL BLOCK DIAGRAM

VBATT

2.5V TO 5.0V

10µF

0.1µF

300kΩ

VDD

SSM2311

22nF

37.5kΩ

EXT

IN+

OUT+

OUT–

AUDIO IN+

AUDIO IN–

FET

DRIVER

MODULATOR

IN–

37.5kΩ

EXT

300kΩ

POP-AND-CLICK

SUPPRESSION

BIAS

OSCILLATOR

SHUTDOWN

GND

300kΩ

(37.5kΩ + R

GAIN =

)

EXT

INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE

VOLTAGE IS APPROXIMATELY V /2.

Figure 1.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与SSM2311相关器件

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SSM2311CBZ-R2	ADI	获取价格	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier
SSM2311CBZ-REEL	ADI	获取价格	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier
SSM2311CBZ-REEL7	ADI	获取价格	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier
SSM2311-EVALZ	ADI	获取价格	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier
SSM2311-MINI-EVALZ	ADI	获取价格	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier
SSM2312GN	SSC	获取价格	N-channel Enhancement-mode Power MOSFET
SSM2313GN	SSC	获取价格	P-channel Enhancement-mode Power MOSFET
SSM2314GN	SSC	获取价格	N-channel Enhancement-mode Power MOSFET
SSM2315	ADI	获取价格	Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier
SSM2315CBZ-R21	ADI	获取价格	Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier

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