MAXIM MAX9830 Technical data

General Description

The MAX9830 mono 2W Class D amplifier provides
Class AB audio performance with Class D efficiency.

Active emissions limiting edge rate and overshoot con­trol circuitry greatly reduces EMI. A filterless spread­spectrum modulation scheme eliminates the need for
output filtering found in traditional Class D devices.
These features reduce application component count.

The MAX9830’s industry-leading 1.6mA at 5V, 1.2mA at

3.6V, quiescent current extends battery life in portable
applications.

The MAX9830 is available in an 8-pin TDFN (2mm x
2mm x 0.8mm) and is specified over the extended

-40°C to +85°C temperature range.

Applications

Notebook and Netbook Computers

Cellular Phones

MP3 Players

Portable Audio Players

VoIP Phones

Features

o Industry-Leading Quiescent Current: 1.6mA at 5V,

1.2mA at 3.6V

o Spread Spectrum and Active Emissions Limiting

o Passes EMI Limit Unfiltered with Up to 24in

(61cm) of Speaker Cable

o Click-and-Pop Suppression

o Thermal and Overcurrent Protection

o Low 0.5µA Current Shutdown Mode

o Space-Saving, 2mm x 2mm x 0.8mm, 8-Pin TDFN

Package

MAX9830

Mono 2W Class D Amplifier

________________________________________________________________

Maxim Integrated Products

1

19-4806; Rev 1; 4/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Typical Operating Circuit

Ordering Information

+

Denotes a lead(Pb)-free/RoHS-compliant package.

*

EP = Exposed pad.

Pin Configuration

PART TEMP RANGE PIN-PACKAGE

MAX9830AETA+ -40°C to +85°C 8 TDFN-EP*

TOP VIEW

*EP = EXPOSED PAD. CONNECT THE EP TO
PGND TO ENHANCE THERMAL DISSIPATION.

PVDD

OUT+

865

7

MAX9830

+

1

2

IN+ SHDN N.C.IN-

2mm x 2mm x 0.8mm

TDFN

OUT- PGND

0.47µF

0.47µF

*EP

34

+2.6V TO +5.5V

IN+

IN-

SHDN

N.C.

MAX9830

PVDD

0.1µF

OUT+

OUT-

PGND

MAX9830

Mono 2W Class D Amplifier

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

PVDD

= V

SHDN

= 5V, V

PGND

= 0V, RL= ∞, unless otherwise specified. RLconnected between OUT+ and OUT-, AC measurement

bandwidth 20Hz to 22kHz, T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Notes 1, 2)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Voltage

PVDD, IN+, IN-, SHDN, to PGND .........................-0.3V to +6V

OUT+, OUT- to PGND...........................-0.3V to V

PVDD

+ 0.3V

Current

Continuous Current Into/Out of PVDD, PGND,

OUT+, OUT- ..............................................................±600mA

Continuous Input Current (all other pins) .....................±20mA

Duration of Short Circuit Between

OUT+, OUT-, and PVDD, PGND ............................Continuous

Continuous Power Dissipation for a Multilayer Board

(T

A

= +70°C)

8-Pin TDFN-EP (derate 11.9mW/°C) .........................953.5mW

Junction Temperature......................................................+150°C

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

Rate of Voltage Rise at PVDD .............................................1V/µs

SPEAKER AMPLIFIER

Voltage Range PVDD Inferred from PSRR test 2.6 5.5 V

Quiescent Supply Current I

Shutdown Supply Current I

Turn-On Time t

Bias Voltage V

Maximum AC Input Voltage V

Input Resistance in Shutdown R

Input Resistance R

Voltage Gain A

Common-Mode Rejection Ratio CMRR fIN = 1kHz, input referred 48 dB

Output Power P

Total Harmonic Distortion Plus
Noise

Output Offset Voltage V

Click-and-Pop Level K

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

= 5.0V 1.6 2.5

DD

SHDN

ON

BIAS

IN

INSD

IN

V

OUT

THD+N f

OS

PVDD

V

= 3.6V 1.2

PVDD

V

= 0V, TA = +25°C 0.5 10 µA

SHDN

Single ended 1

Differential 2

Between inputs 85.6

From inputs to PGND 43

V

= 2.6V to 5.5V, TA = +25°C 54 64.3

PVDD

PVDD

RIPPLE

200mV

(Note 3)

P-P

THD+N = 10%,
f

= 1kHz

IN

= 1kHz

IN

TA = +25°C ±3 ±30 mV

Peak voltage,

CP

A-weighted, 32
samples/sec
(Notes 3, 4)

1.9 4 ms

1.31 V

12 20 kΩ

12 dB

f

= 217Hz 72Power-Supply Rejection Ratio PSRR

=

RIPPLE

f

= 20kHz 64

RIPPLE

RL = 8Ω 1.5

R

= 4Ω 2.25

L

RL = 8Ω, P

0.5W

= 4Ω, P

R

L

=

OUT

= 1W 0.04

OUT

0.04

Into shutdown -56

Out of shutdown -56

mA

V

RMS

kΩ

dB

dBV

W

%

MAX9830

Mono 2W Class D Amplifier

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

PVDD

= V

SHDN

= 5V, V

PGND

= 0V, RL= ∞, unless otherwise specified. RLconnected between OUT+ and OUT-, AC measurement

bandwidth 20Hz to 22kHz, T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Notes 1, 2)

Note 1: All devices are 100% production tested at T

A

= +25°C. All temperature limits are guaranteed by design.

Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R

L

= 4Ω, L = 33µH.

For R

L

= 8Ω, L = 68µH.

Note 3: Amplifier inputs AC-coupled to PGND with C

IN

= 0.47µF.

Note 4: Specified at room temperature with an 8Ω resistive load in series with a 68µH inductive load connected across BTL outputs.

Mode transitions are controlled by SHDN.

Oscillator Frequency f

Spread-Spectrum Bandwidth ±10 kHz

Noise V

Signal-to-Noise Ratio SNR

Output Current Limit I

Thermal Shutdown Level +180 °C

Thermal Shutdown Hysterysis 30 °C

Efficiency η RL = 8Ω, P

DIGITAL INPUT (SHDN)

Input Voltage High V

Input Voltage Low V

Input Leakage Current TA = +25°C ±10 µA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OSC

A-weighted (Note 3) 39 µV

N

P

= P

at 1% THD+N, A-weighted

OUT

= 1.5W 85 %

OUT

1.4 V

LIM

IH

IL

OUT

R

= 8Ω

L

TA = +25°C 3 A

600 kHz

98 dB

0.4 V

RMS

MAX9830

Mono 2W Class D Amplifier

4 _______________________________________________________________________________________

Typical Operating Characteristics

(V

PVDD

= V

SHDN

= 5.0V, V

PGND

= 0V, RL= ∞, unless otherwise specified. RLconnected between OUT+ and OUT-, AC measure-

ment bandwidth 20Hz to 22kHz, T

A

= +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

10

V

= 5.0V

PVDD

I

R

= 4

LOAD

1

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

10

V

= 3.6V

PVDD

I

R

= 4

LOAD

1

P

OUT

MAX9830 toc01

= 400mW

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

10

V

= 5.0V

PVDD

I

R

= 8

LOAD

1

P

OUT

= 100mW

P

OUT

MAX9830 toc02

= 100mW

MAX9830 toc03

THD+N (%)

0.1

P

= 1.4W

OUT

0.01
10 100k

FREQUENCY (Hz)

10k1k100

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

10

V

= 3.6V

PVDD

I

R

= 8

LOAD

1

THD+N (%)

0.1

P

0.01
10 100k

FREQUENCY (Hz)

OUT

= 500mW

P

OUT

= 100mW

10k1k100

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

10

V

= 5.0V

PVDD

I

R

= 8

LOAD

1

f = 6kHz

THD+N (%)

f = 1kHz

0.1

f = 100Hz

0.01

01.8
OUTPUT POWER (W)

1.61.41.21.00.80.60.40.2

MAX9830 toc04

MAX9830 toc07

THD+N (%)

0.1

0.01
10 100k

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

10

V

= 5.0V

PVDD

R

= 4I

LOAD

1

f = 1kHz

THD+N (%)

0.1

f = 100Hz

0.01

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

10

V

= 3.6V

PVDD

R

= 8

LOAD

1

THD+N (%)

f = 1kHz

0.1

0.01
0 0.9

P

= 600mW

OUT

FREQUENCY (Hz)

f = 6kHz

OUTPUT POWER (W)

I

f = 6kHz

f = 100Hz

OUTPUT POWER (W)

THD+N (%)

0.1

0.01

10k1k100

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. OUTPUT POWER

10

V

= 3.6V

PVDD

I

R

= 4

0.01

LOAD

1

f = 1kHz

f = 6kHz

0.1

f = 100Hz

OUTPUT POWER (W)

MAX9830 toc05

THD+N (%)

2.52.01.51.00.503.0

OUTPUT POWER vs. LOAD RESISTANCE

2.5
V

= 5.0V

PVDD

MAX9830 toc08

2.0

1.5

1.0

OUTPUT POWER (W)

0.5

0.80.70.60.50.40.30.20.1

THD+N = 1%

0

1100

LOAD RESISTANCE (I)

P

OUT

10

= 1W

10k1k100

1.00.80.60.40.20 1.4

THD+N = 10%

MAX9830 toc06

1.2

MAX9830 toc09