Datasheet > SSM2301

SSM2301

更新时间： 2024-11-03 04:02:47

品牌	Logo	应用领域
德州仪器 - TI		音频放大器
页数	文件大小	规格书
19页	367K
描述
Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier

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SSM2301 数据手册

Filterless High Efficiency Mono 1.4 W

Class-D Audio Amplifier

SSM2301

Preliminary Technical Data

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

from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is

better than 93 dB. Spread-spectrum modulation is used to

provide lower EMI-radiated emissions compared with other

Class-D architectures.

FEATURES

Filterless Class-D amplifier with built-in output stage

1.4 W into 8 Ω at 5.0 V supply with less than 1% THD

85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker

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

Single-supply operation from 2.5 V to 5.0 V

20 nA ultralow shutdown current

Short-circuit and thermal protection

Available in 8-lead, 3 mm × 3 mm LFCSP

Pop-and-click suppression

The SSM2301 has a micropower shutdown mode with a

maximum shutdown current of 30 nA. Shutdown is enabled by

applying a logic low to the

pin.

Built-in resistors reduce board component count

Fixed and user-adjustable gain configurations

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 SSM2301 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.

GENERAL DESCRIPTION

The SSM2301 also has excellent rejection of power supply noise,

including noise caused by GSM transmission bursts and RF

rectification. PSRR is typically 63 dB at 217 Hz.

The SSM2301 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 5.0 V

supply. It is capable of delivering 1.4 W of continuous output

power with less than 1% THD + N driving an 8 Ω load from a

5.0 V supply.

The gain can be set to 6 dB or 12 dB utilizing the gain control

select pin connected respectively to ground or V_DD. Gain can

also be adjusted externally by using an external resistor.

The SSM2301 is specified over the comercial temperature range

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

short-circuit protection. It is available in an 8-lead, 3 mm × 3 mm

lead-frame chip scale package (LFCSP).

The SSM2301 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

FUNCTIONAL BLOCK DIAGRAM

0.1µF

10µF

VBATT

2.5V TO 5.0V

VDD

SSM2301

0.01µF

IN+

OUT+

OUT–

AUDIO IN+

GAIN

CONTROL

FET

DRIVER

MODULATOR

IN–

AUDIO IN–

0.01µF

GAIN

POP/CLICK

SUPRESSION

BIAS

OSCILLATOR

SHUTDOWN

GND

INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE

VOLTAGE IS APPROXIMATELY V /2.

Figure 1.

Rev. PrH

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SSM2301相关器件

型号	品牌	获取价格	描述	数据表
SSM2301_01	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301CPZ	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301CPZ-R2	TI	获取价格	Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier
SSM2301CPZ-R2	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301CPZ-REEL	TI	获取价格	Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier
SSM2301CPZ-REEL	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301CPZ-REEL7	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301CPZ-REEL7	TI	获取价格	Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier
SSM2301-EVALZ	ADI	获取价格	Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier
SSM2301N	SSC	获取价格	P-CHANNEL ENHANCEMENT-MODE POWER MOSFET

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