SSM2302

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	457K
描述
Filterless High Efficiency Class-D Stereo Audio Amplifier

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SSM2302 数据手册

Filterless High Efficiency

Class-D Stereo Audio Amplifier

SSM2302

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

than 98 dB. PDM 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

The SSM2302 has a micropower shutdown mode with a typical

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

logic low to the

pin.

Short-circuit and thermal protection

Available in 16-lead, 3 mm × 3 mm LFCSP

Pop-and-click suppression

Built-in resistors reduce board component count

Fixed and user-adjustable gain configurations

The architecture of the device allows it to achieve a very low level

of pop and click. 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 SSM2302 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 SSM2302 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.

GENERAL DESCRIPTION

The SSM2302 is a fully integrated, high efficiency, Class-D stereo

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 con-

tinuous 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 SSM2302 is specified over the commercial temperature range

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

short-circuit protection. It is available in a 16-lead, 3 mm × 3 mm

lead-frame chip scale package (LFCSP).

The SSM2302 features a high efficiency, low noise modulation

scheme. It operates with 85% efficiency at 1.4 W into 8 Ω from a

FUNCTIONAL BLOCK DIAGRAM

0.1µF

10µF

VBATT

2.5V TO 5.0V

VDD

SSM2302

0.01µF

INR+

OUTR+

RIGHT IN+

GAIN

CONTROL

FET

DRIVER

MODULATOR

INR–

OUTR–

RIGHT IN–

0.01µF

SHUTDOWN

GAIN

INTERNAL

OSCILLATOR

BIAS

0.01µF

INL+

INL–

OUTL+

OUTL–

LEFT IN+

LEFT IN–

GAIN

CONTROL

FET

MODULATOR

GND

DRIVER

GND

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SSM2302相关器件

型号	品牌	获取价格	描述	数据表
SSM2302CPZ-R2	ADI	获取价格	Filterless High Efficiency Class-D Stereo Audio Amplifier
SSM2302CPZ-REEL	ADI	获取价格	Filterless High Efficiency Class-D Stereo Audio Amplifier
SSM2302CPZ-REEL7	ADI	获取价格	Filterless High Efficiency Class-D Stereo Audio Amplifier
SSM2302N	SSC	获取价格	N-CHANNEL ENHANCEMENT-MODE POWER MOSFET
SSM2303N	SSC	获取价格	P-CHANNEL ENHANCEMENT-MODE POWER MOSFET
SSM2304	ADI	获取价格	2 W Filterless Class-D Stereo Audio Amplifier
SSM2304AGN	SSC	获取价格	N-CHANNEL ENHANCEMENT-MODE POWER MOSFET
SSM2304CPZ-REEL	ADI	获取价格	2 W Filterless Class-D Stereo Audio Amplifier
SSM2304CPZ-REEL7	ADI	获取价格	2 W Filterless Class-D Stereo Audio Amplifier
SSM2304N	SSC	获取价格	N-CHANNEL ENHANCEMENT-MODE POWER MOSFET

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