SSM2315CBZ-REEL7 Analog Devices Inc, SSM2315CBZ-REEL7 Datasheet

IC,Audio Amplifier,SINGLE,BGA,9PIN,PLASTIC

SSM2315CBZ-REEL7

Manufacturer Part Number

SSM2315CBZ-REEL7

Description

IC,Audio Amplifier,SINGLE,BGA,9PIN,PLASTIC

Manufacturer

Analog Devices Inc

Type

Class Dr

Datasheet

1.SSM2315CBZ-REEL7.pdf (16 pages)

Specifications of SSM2315CBZ-REEL7

Output Type

1-Channel (Mono)

Max Output Power X Channels @ Load

4.28W x 1 @ 3 Ohm

Voltage - Supply

2.5 V ~ 5.5 V

Features

Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown

Mounting Type

Surface Mount

Package / Case

9-WLCSP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

SSM2315-EVALZ - BOARD EVAL SSM2315

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

SSM2315CBZ-REEL7TR

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Manufacturer

Quantity

Price

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Part Number:

SSM2315CBZ-REEL7

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ADI

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26 955

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Meier Automation Equipment Co., Limited

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SSM2315CBZ-REEL7

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FEATURES

Filterless Class-D amplifier with Σ-Δ modulation

No sync necessary when using multiple Class-D amplifiers

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

93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker

>103 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 6 dB or user adjustable gain setting

APPLICATIONS

Mobile phones

MP3 players

Portable gaming

Portable electronics

Educational toys

GENERAL DESCRIPTION

The SSM2315 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 <1% THD + N driving a 3 Ω load from a 5.0 V supply.

Rev. A

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 registered trademarks are the property of their respective owners.

from Analog Devices, Inc.

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

SHUTDOWN

*INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE

VOLTAGE IS APPROXIMATELY V

AUDIO IN+

AUDIO IN–

47nF*

FUNCTIONAL BLOCK DIAGRAM

IN+

IN–

SSM2315

80kΩ

/2.

BIAS

MODULATOR

Mono 3 W Class-D Audio Amplifier

10µF

Figure 1.

160kΩ

(Σ-Δ)

OSCILLATOR

INTERNAL

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

Tel: 781.329.4700

Fax: 781.461.3113

The SSM2315 features a high efficiency, low noise modulation

scheme that requires no external LC output filters. The modulation

continues to provide high efficiency even at low output power.

It operates with 93% 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 of >103 dB.

Spread-spectrum pulse density modulation is used to provide

lower EMI-radiated emissions compared with other Class-D

architectures.

The SSM2315 has a micropower shutdown mode with a typical

shutdown current of 20 nA. Shutdown is enabled by applying

a logic low to the SD pin.

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

This suppression circuitry minimizes voltage glitches at the

output during turn-on and turn-off, reducing audible noise

on activation and deactivation.

The fully differential input of the SSM2315 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

The default gain of the SSM2315 is 6 dB, but users can reduce the

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

The SSM2315 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 9-ball, 1.5 mm × 1.5 mm

wafer level chip scale package (WLCSP).

0.1µF

DRIVER

FET

GND

Filterless, High Efficiency,

SUPPRESSION

POP/CLICK

VDD

OUT+

OUT–

VBATT

2.5V TO 5.5V

/2.

SSM2315

www.analog.com

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SSM2315CBZ-REEL7 Summary of contents

Page 1

FEATURES Filterless Class-D amplifier with Σ-Δ modulation No sync necessary when using multiple Class-D amplifiers from Analog Devices, Inc into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <1% total harmonic ...

Page 2

SSM2315 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution .................................................................................. 4 Pin ...

Page 3

SPECIFICATIONS 5 Ω μH, unless otherwise noted Table 1. Parameter Symbol DEVICE CHARACTERISTICS Output Power P Efficiency η Total Harmonic Distortion + Noise THD ...

Page 4

SSM2315 ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings apply at 25°C, unless otherwise noted. Table 2. Parameter Supply Voltage Input Voltage Common-Mode Input Voltage Continuous Output Power Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic GND 1A IN+ 1C IN− 3C OUT+ 1B VDD 3B GND 3A OUT− 2B PVDD BALL A1 CORNER ...

Page 6

SSM2315 TYPICAL PERFORMANCE CHARACTERISTICS 100 R = 8Ω + 33µH L GAIN = 6dB 0.1 0.01 0.001 0.0001 0.001 0.01 0.1 OUTPUT POWER (W) Figure 3. THD + N vs. Output Power ...

Page 7

V = 3.6V DD GAIN = 6dB R = 8Ω + 33µ 0.1 0.01 0.5W 0.001 10 100 1k FREQUENCY (Hz) Figure 9. THD + N vs. Frequency 3 100 ...

Page 8

SSM2315 4.1 3.9 3 3Ω + 33µ 4Ω + 33µH L 3.3 NO LOAD 3.1 2.9 2.7 2.5 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) Figure 15. Supply Current vs. Supply Voltage 2.0 ...

Page 9

8Ω + 33µH L 0.14 0.12 0.10 0.08 0.06 0.04 0. 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT POWER (W) Figure 21. Power Dissipation vs. Output Power Ω ...

Page 10

SSM2315 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 10 100 1k FREQUENCY (Hz) Figure 27. Power Supply Rejection Ratio (PSRR) vs. Frequency 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 10 100 1k ...

Page 11

TYPICAL APPLICATION CIRCUITS EXTERNAL GAIN SETTINGS = 160kΩ/(80kΩ AUDIO IN+ AUDIO IN– SHUTDOWN *INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE VOLTAGE IS APPROXIMATELY V EXTERNAL GAIN SETTINGS = 160kΩ/(80kΩ AUDIO IN+ SHUTDOWN ) EXT 0.1µF ...

Page 12

SSM2315 THEORY OF OPERATION OVERVIEW The SSM2315 mono Class-D audio amplifier features a filterless modulation scheme that greatly reduces the external component count, conserving board space and, thus, reducing systems cost. The SSM2315 does not require an output filter but, ...

Page 13

LAYOUT As output power continues to increase, care must be taken to lay out PCB traces and wires properly among the amplifier, load, and power supply. A good practice is to use short, wide PCB tracks to decrease voltage drops ...

Page 14

... A1 BALL 1.430 CORNER TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 SSM2315CBZ-R2 −40°C to +85°C SSM2315CBZ-REEL 1 −40°C to +85°C 1 SSM2315CBZ-REEL7 −40°C to +85°C 1 SSM2315-EVALZ RoHS Compliant Part. 0.655 0.600 0.545 SEATING PLANE 0.350 0.320 0.290 0.50 BALL PITCH 0 ...

Page 15

NOTES Rev Page SSM2315 ...

Page 16

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