Datasheet > SSM2377ACBZ-RL

SSM2377ACBZ-RL

更新时间： 2024-11-29 09:04:55

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
16页	474K
描述
Filterless, High Efficiency, Mono 2.5 W Class-D Audio Amplifier Pop-and-click suppression

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SSM2377ACBZ-RL 数据手册

Filterless, High Efficiency,

Mono 2.5 W Class-D Audio Amplifier

SSM2377

The SSM2377 operates with 92% efficiency at 1.4 W into 8 Ω

from a 5.0 V supply and has an SNR of >100 dB.

FEATURES

Filterless, Class-D amplifier with spread-spectrum

Σ-Δ modulation

Spread-spectrum pulse density modulation (PDM) is used to

provide lower EMI-radiated emissions compared with other

Class-D architectures. The inherent randomized nature of

spread-spectrum PDM eliminates the clock intermodulation

(beating effect) of several amplifiers in close proximity.

2.5 W into 4 Ω load and 1.4 W into 8 Ω load at 5.0 V supply

with <1% total harmonic distortion plus noise (THD + N)

92% efficiency at 5.0 V, 1.4 W into 8 Ω speaker

>100 dB signal-to-noise ratio (SNR)

High PSRR at 217 Hz: 80 dB

The SSM2377 produces ultralow EMI emissions that signifi-

cantly reduce the radiated emissions at the Class-D outputs,

particularly above 100 MHz. The SSM2377 passes FCC Class B

radiated emission testing with 50 cm, unshielded speaker cable

without any external filtering. The ultralow EMI emissions of the

SSM2377 are also helpful for antenna and RF sensitivity problems.

Ultralow EMI emissions

Single-supply operation from 2.5 V to 5.5 V

Gain select function: 6 dB or 12 dB

Fixed input impedance of 80 kΩ

100 nA shutdown current

Short-circuit and thermal protection with autorecovery

Available in a 9-ball, 1.2 mm × 1.2 mm WLCSP

Pop-and-click suppression

The device is configured for either a 6 dB or a 12 dB gain setting

by connecting the GAIN pin to the VDD pin or the GND pin,

respectively. Input impedance is a fixed value of 80 kΩ, indepen-

dent of the gain select operation.

APPLICATIONS

Mobile phones

MP3 players

Portable electronics

The SSM2377 has a micropower shutdown mode with a typical

shutdown current of 100 nA. Shutdown is enabled by applying

a logic low to the

pin.

GENERAL DESCRIPTION

The device also includes pop-and-click suppression circuitry,

which minimizes voltage glitches at the output during turn-on

and turn-off, reducing audible noise on activation and deactivation.

Built-in input low-pass filtering is also included to suppress out-

of-band noise interference to the PDM modulator.

The SSM2377 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 2.5 W of continuous output power

with <1% THD + N driving a 4 Ω load from a 5.0 V supply.

The SSM2377 is specified over the industrial temperature range

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

short-circuit protection. It is available in a halide-free, 9-ball, 0.4 mm

pitch, 1.2 mm × 1.2 mm wafer level chip scale package (WLCSP).

The SSM2377 features a high efficiency, low noise modulation

scheme that requires no external LC output filters. The modu-

lation operates with high efficiency even at low output power.

FUNCTIONAL BLOCK DIAGRAM

POWER SUPPLY

2.5V TO 5.5V

10µF

0.1µF

VDD

SSM2377

22nF

80kΩ

OUT+

AUDIO IN–

FET

DRIVER

MODULATOR

IN+

80kΩ

OUT–

GND

(Σ-Δ)

AUDIO IN+

IN–

22nF

INTERNAL

OSCILLATOR

POP/CLICK

AND EMI

SUPPRESSION

BIAS

SHUTDOWN

GAIN

GAIN SELECT

GAIN = 6dB OR 12dB

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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SSM2377ACBZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
SSM2335CBZ-R2	ADI	完全替代	Filterless, High Efficiency, Mono 3 W Class-D Audio Amplifier
SSM2377ACBZ-R7	ADI	类似代替	Filterless, High Efficiency, Mono 2.5 W Class-D Audio Amplifier Pop-and-click suppression
SSM2317CBZ-REEL7	ADI	类似代替	Filterless High Efficiency Mono 3 W Class-D Audio Amplifier

与SSM2377ACBZ-RL相关器件

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SSM2380CBZ-REEL7	ADI	获取价格	2 x 2 W, Filterless, Stereo, Class-D Audio Amplifier with ALC + I2C
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SSM2402	ADI	获取价格	Dual Audio Analog Switches
SSM-2402	ADI	获取价格	Dual Audio Analog Switches
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