MPS EV0030 Manuale utente

EV0030 (MP7720DS)

20W Stereo Class D

Single Ended Audio Amplifier

EVALUATION BOARD

EV0030 Rev. 1.6 www.MonolithicPower.com 1

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

The Future of Analog IC Technology

GENERAL DESCRIPTION

The EV0030 is the evaluation board for the

MP7720, a mono 20W Class D Audio Amplifier.

It is one of MPS’ second generation of fully

integrated audio amplifiers which dramatically

reduces solution size by integrating the

following:

180mpower MOSFETs

Startup / Shutdown pop elimination

Short circuit protection circuits

Mute / Standby

The MP7720 utilizes a single ended output

structure capable of delivering 20W into 4

speakers. MPS Class D Audio Amplifiers exhibit

the high fidelity of a Class A/B amplifier at

efficiencies greater than 90%. The circuit is

based on the MPS’ AAMTM proprietary variable

frequency topology that delivers excellent

PSRR, fast response time and operates on a

single power supply.

ELECTRICAL SPECIFICATIONS

Parameter Symbol Value Units

Supply Voltage VDD 24 V

FEATURES

•20W Output at VDD = 24V into a 4load

•THD+N = 0.04% at 1W, 8

•93% Efficiency at 20W

•Low Noise (190µV Typical)

•Switching Frequency Up to 1MHz

•9.5V to 24V Operation from a Single Supply

•Integrated Startup and Shutdown Pop

Elimination Circuit

•Thermal Protection

•Integrated 180mSwitches

•Mute/Standby Modes (Sleep)

•Available in Tiny 8-Pin SOIC and PDIP Packages

APPLICATIONS

•Surround Sound DVD Systems

•Televisions

•Flat Panel Monitors

•Multimedia Computers

•Home Stereo Systems

“MPS” and “The Future of Analog IC Technology”, are Registered Trademarks

of Monolithic Power Systems, Inc.

AAM (Analog Adaptive Modulation) is a Trademark of Monolithic Power

Systems, Inc.

EV0030 EVALUATION BOARD

Dimensions (2.4”X x 3.5”Y x 1.2”Z)

Board Number MPS IC Number

EV0030 MP7720DS

0.1

0.01

THD+N (%)

0.1 1 10 30

POWER (W)

MP7720-TPC01

THD+N vs

Power (24V, 1KHz)

EV0030 – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

EV0030 Rev. 1.6 www.MonolithicPower.com 2

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

EVALUATION BOARD SCHEMATIC

TP1

LED1206

LED100

VDD

EXT_ENABLE

SW100

CN101

RCA

IN2

VDD

MP7720

NIN

AGND

PGND

VDD

SP1:A

OUT2

RIGHT-CHANNEL SPEAKER

EV0030_S01

FB2

C12

3.3nF

C19

390pF

ZENER

6.2V

MBRS130LTR

C16

22pF

CN100

RCA

IN1

VDD

MP7720

NIN

AGND

PGND

VDD

SP1:B

OUT1

LEFT-CHANNEL SPEAKER

FB1

C11

3.3nF

390pF

ZENER

6.2V

MBRS130LTR

C15

22pF

VDD

CN102

GND

EV0030 – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

EV0030 Rev. 1.6 www.MonolithicPower.com 3

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

EV0030 BILL OF MATERIALS

Qty Ref Value Description Package Manufacturer Manufacturer P/N

3 C1, C3,

C124 1µF Ceramic Capacitor, X5R, 16V SM0805 Panasonic ECJ-2FB1C105K

4 C2, C4,

C5, C6 NS Not Stuffed

2 C9, C19 390pF Ceramic Capacitor, X7R, 50V SM0805 Panasonic ECU-V1H391KBN

2 C11, C12 3.3nF Ceramic Capacitor, X7R, 50V SM0805 Panasonic ECJ-2VB1H472K

2 C13, C14 100µF Electrolytic Capacitor, 35V Radial Panasonic EEU-FC1V101

2 C15, C16 22pF Ceramic Capacitor, NPO, 50V SM0805 Panasonic ECJ-2VC1H220J

2 C17, C18 1µF Ceramic Capacitor, X7R, 25V SM1206 Panasonic ECJ-3YB1E105K

2 C21, C22 0.1µF Ceramic Capacitor, X7R, 50V SM0805 Panasonic ECJ-2YB1H104K

2 C23, C24 0.47µF Metallized Film Capacitor,

50V Radial Panasonic ECQ-V1H474JL

2 C25, C26 1000µF Electrolytic Capacitor, 25V Radial Panasonic ECA-1EHG102

1 C27 2200µF Electrolytic Capacitor, 25V Radial Panasonic EEU-FC1E222

2 C102,

C114 4.7µF Ceramic Capacitor, X5R, 16V SM1206 Panasonic ECJ-3YB1C475M

2 D1, D3 Zener Diode, 6.2V MINIMELF Diodes Inc ZMM5234B-7

2 D6, D8 Schottky Diode, 30V, 1A SMB IRF MBRS130LTR

2 FB1, FB2 Ferrite Bead SM1210 FAIR-RITE 2512067007Y3

2 L1, L2 10µH Inductor, 3.5A Radial/10RYTL Toko A7024LYF-100K

2 R1, R2 NS Not Stuffed

R3, R4,

R5, R6,

R13, R14,

R113

10kCeramic Resistor, 1% SM0805 Panasonic ERJ-6ENF1002V

2 R7, R11 10Ceramic Resistor, 5% SM0805 Panasonic ERJ-6GEYJ100V

2 R8, R12 10Ceramic Resistor, 5% SM1206 Panasonic ERJ-8GEYJ100V

2 R17, R18 120kCeramic Resistor, 5% SM0805 Panasonic ERJ-6GEYJ124V

1 R112 3kCeramic Resistor, 5% SM0805 Panasonic ERJ-6GEYJ302V

R201,

R202,

R203,

R204

100kCeramic Resistor, 1% SM0805 Panasonic ERJ-6ENF1003V

2 U1, U2 Amplifier SOIC8 MPS MP7720

EV0030 – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

EV0030 Rev. 1.6 www.MonolithicPower.com 4

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PRINTED CIRCUIT BOARD LAYOUT

Figure 1—Top Silk Layer Figure 2—Top Layer

Figure 3—Bottom Silk Layer Figure 4—Bottom Layer

MPS MP7720

EV0030

OUT SP1

4ΩMin

IN 1

IN 2

GND

24V

OUT SP2

4ΩMin

Figure 5—EV0030 Connection Diagram

EV0030 – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

EV0030 Rev. 1.6 www.MonolithicPower.com 5

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

TYPICAL PERFORMANCE CHARACTERISTICS

POUT (W)

5 101520253035

VDD (V)

MP7720-TPC10

OUT

100

EFFICIENCY (%)

0 5 10 15 20 25 30

OUTPUT POWER (W)

MP7720-TPC09

Efficiency vs

OUT

-2

-4

-6

-8

-10

AMPLITUDE (dBr)

20 10K 40K1K100

FREQUENCY (Hz)

MP7720-TPC08

Frequency Response

(Ref=2Vrms, A

=8.2)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

AMPLITUDE (dBr)

100 1K 10K

FREQUENCY (Hz)

MP7720-TPC07

-20

-40

-60

-80

-100

-120

-140

AMPLITUDE (dBV)

20 100 1K 10K

FREQUENCY (Hz)

MP7720-TPC06

THD+N (%)

FREQUENCY (Hz)

MP7720-TPC05

100

0.1

0.01

THD+N (%)

20 100 1K 10K

FREQUENCY (Hz)

MP7720-TPC04

THD+N (%)

POUT (W)

MP7720-TPC03

0.1

0.01

0.1

0.01

THD+N (%)

0.1 1 10 30 0.1 1 10 30

POUT (W)

MP7720-TPC02

f=1KHz

f=10KHz f=10KHz

f=100Hz f=100Hz

f=1KHz

100

0.1

0.01

20 100 1K 10K

EV0030 – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.

Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS

products into any application. MPS will not assume any legal responsibility for any said applications.

EV0030 Rev. 1.6 www.MonolithicPower.com 6

6/13/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

QUICK START GUIDE

This board is set up from the factory for 24V operation. To use with a 12V power supply adjust the

components as specified in the 12V operation Section 3 below. For more information, consult the

MP7720 datasheet.

1. Power Requirements

a. Power supply: 24V, 6A maximum.

b. 0V to 1VRMS (max) audio signal source.

c. Speaker: 4or 8.

2. Setup Condition for 24V Operation

a. Connect the outputs to the external speakers.

b. Adjust the power supply to 24V (do not turn on).

c. Connect the power supply to the VDD terminals.

d. Set the enable switch to the DISABLE position.

e. Connect the audio input signal source to the amplifier inputs (IN1, IN2).

f. Turn on the power supply to apply power to the board.

3. 12V Operation Modifications

a. Change C11 and C12 to 2.2nF components. Change R13 and R14 to 2k(consult the

MP7720 datasheet for more details).

b. Adjust the power supply to 12V (do not turn on).

c. Use same procedure for turn on as specified in Section 2.

4. Music Turn-On Sequence

a. Set the enable switch to the ENABLE position.

b. Audio should be heard from the speaker(s).

5. Music Turn-Off Sequence

a. Set the enable switch to the DISABLE position.

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