SSM2317CBZ-REEL7 Analog Devices Inc, SSM2317CBZ-REEL7 Datasheet

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

SSM2317CBZ-REEL7

Manufacturer Part Number
SSM2317CBZ-REEL7
Description
IC,Audio Amplifier,SINGLE,BGA,9PIN,PLASTIC
Manufacturer
Analog Devices Inc
Type
Class Dr
Datasheet
1.SSM2317CBZ-REEL7.pdf (20 pages)

Specifications of SSM2317CBZ-REEL7

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
3.89W 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
SSM2317-MINI-EVALZ - BOARD EVAL MINI SSM2317SSM2317-EVALZ - BOARD EVAL SSM2317
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SSM2317CBZ-REEL7TR
FEATURES
Filterless Class-D amplifier with Σ-Δ modulation
Automatic level control (ALC) improves dynamic range and
3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply
700 mW into 8 Ω load at 4.2 V supply (ALC 80%)
93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
>93 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
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
GENERAL DESCRIPTION
The SSM2317 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
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.
prevents clipping
with <10% total harmonic distortion (ALC off)
SHUTDOWN
AUDIO IN+
AUDIO IN–
1
INPUT CAPACITORS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY V
0.1µF
0.1µF
1
1
IN+
IN–
SD
10kΩ
10kΩ
BIAS
FUNCTIONAL BLOCK DIAGRAM
ALC_EN
ALC ENABLE
80kΩ
80kΩ
DD
/2.
ALC
Mono 3 W Class-D Audio Amplifier
Figure 1.
VTH
R
TH
SSM2317
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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.
The SSM2317 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 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
>93 dB. Spread-spectrum pulse density modulation is used to
provide lower EMI radiated emissions compared with other
Class-D architectures.
Automatic level control (ALC) can be activated to suppress
clipping and improve dynamic range. This feature only requires
one external resistor tied to GND via the VTH pin and an
activation voltage on the ALC_EN pin.
The SSM2317 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
minimizes voltage glitches at the output during turn-on and turn-
off, reducing audible noise on activation and deactivation.
The default gain of the SSM2317 is 18 dB, but users can reduce the
gain by using a pair of external resistors (see the Gain section).
The SSM2317 is specified over the commercial 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).
10µF
MODULATOR
OSCILLATOR
INTERNAL
(Σ-Δ)
Filterless High Efficiency
0.1µF
POP-AND-CLICK
SUPPRESSION
DRIVER
VDD
FET
GND
©2008 Analog Devices, Inc. All rights reserved.
VBATT
2.5V TO 5.5V
OUT+
OUT–
SSM2317
www.analog.com

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SSM2317CBZ-REEL7 Summary of contents

Page 1

FEATURES Filterless Class-D amplifier with Σ-Δ modulation Automatic level control (ALC) improves dynamic range and prevents clipping 3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <10% total harmonic distortion (ALC ...

Page 2

SSM2317 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin ...

Page 3

SPECIFICATIONS 25° Ω μH, ALC = off, unless otherwise noted Table 1. Parameter DEVICE CHARACTERISTICS Output Power Efficiency Total Harmonic Distortion + Noise Input Common-Mode Voltage ...

Page 4

SSM2317 Parameter NOISE PERFORMANCE Output Voltage Noise Signal-to-Noise Ratio 1 Although the SSM2317 has good audio quality above 3 W, continuous output power beyond 3 W must be avoided due to device packaging limitations. Symbol Conditions 3.6 ...

Page 5

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings apply wise 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) ESD ...

Page 6

SSM2317 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic 1A IN− 1B IN+ 1C GND ALC_EN 2C VDD 3A VTH 3B OUT− 3C OUT+ BALL A1 CORNER ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 100 R = 8Ω + 33µH L GAIN = 18dB 2. 0.1 0.01 0.001 0.0001 0.001 0.01 0.1 OUTPUT POWER (W) Figure 3. THD + N vs. Output Power into ...

Page 8

SSM2317 100 V = 3.6V DD GAIN = 18dB R = 8Ω + 33µ 0.1 0.5W 0.125W 0.01 0.25W 0.001 10 100 1k FREQUENCY (Hz) Figure 9. THD + N vs. Frequency 3 ...

Page 9

R = 8Ω + 33µ 4Ω + 33µH L 3.6 3.4 NO LOAD 3.2 3.0 2.8 2.6 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) Figure 15. Supply Current vs. Supply Voltage ...

Page 10

SSM2317 100 3. 2. 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 OUTPUT POWER (W) ...

Page 11

R = 3Ω + 33µH L 900 800 700 V = 3.6V DD 600 500 V = 2.5V DD 400 300 200 100 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 ...

Page 12

SSM2317 3. 8Ω + 33µH L ALC = ON 1 0.1 0.01 0.001 0.01 0.1 INPUT (V rms) Figure 33. Input/Output Characteristic, V 1V/DIV INPUT OUTPUT ALC = ON V ...

Page 13

TYPICAL APPLICATION CIRCUITS EXTERNAL GAIN SETTINGS = 80kΩ/(10kΩ 0.1µF R EXT AUDIO IN+ 1 0.1µF R EXT AUDIO IN– SHUTDOWN EXTERNAL GAIN SETTINGS = 80kΩ/(10kΩ 0.1µF R EXT AUDIO IN+ 0.1µF R EXT SHUTDOWN ) ...

Page 14

SSM2317 THEORY OF OPERATION OVERVIEW The SSM2317 mono Class-D audio amplifier features a filterless modulation scheme that greatly reduces the external components count, conserving board space and, thus, reducing systems cost. The SSM2317 does not require an output filter but ...

Page 15

A multilayer board allows a complete layer to be used for the ground plane, whereas the ground plane side of a double-sided board is often disrupted with signal crossover. If the system has separate analog and ...

Page 16

SSM2317 OUTPUT THRESHOLD The maximum output amplitude threshold (V limiting mode can be changed from 90 having an external resistor between the VTH pin and GND. TH Shorting the VTH pin to GND sets ...

Page 17

... OUTLINE DIMENSIONS 1.490 1.460 SQ A1 BALL 1.430 CORNER TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Model Temperature Range 1 SSM2317CBZ-REEL −40°C to +85°C SSM2317CBZ-REEL7 1 −40°C to +85°C 1 SSM2317-EVALZ SSM2317-MINI-EVALZ RoHS Compliant Part. 0.655 0.600 0.545 SEATING PLANE 0.350 0.320 0.290 ...

Page 18

SSM2317 NOTES Rev Page ...

Page 19

NOTES Rev Page SSM2317 ...

Page 20

SSM2317 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07242-0-6/08(A) Rev Page ...

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