MPS EV0030 User manual

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.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
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
20
10
1
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.
© 2005 MPS. All Rights Reserved.
TM
EVALUATION BOARD SCHEMATIC
TP1
LED1206
LED100
VDD
VDD
EN
EXT_ENABLE
SW100
CN101
RCA
IN2
+
+
EN
VDD
VDD
MP7720
U2
PIN
NIN
AGND
EN
8
7
6
5
1
2
3
4
8
7
6
5
1
2
3
4
PGND
SW
VDD
BS
SP1:A
OUT2
RIGHT-CHANNEL SPEAKER
R1
NS
EV0030_S01
FB2
C12
3.3nF
C5
NS
C19
390pF
D3
ZENER
6.2V
D8
MBRS130LTR
C4
NS
C16
22pF
CN100
RCA
IN1
+
+
EN
VDD
VDD
MP7720
U1
PIN
NIN
AGND
EN
PGND
SW
VDD
BS
SP1:B
OUT1
LEFT-CHANNEL SPEAKER
R2
NS
FB1
C11
3.3nF
C6
NS
C9
390pF
D1
ZENER
6.2V
D6
MBRS130LTR
C2
NS
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.
© 2005 MPS. All Rights Reserved.
TM
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
7
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
4
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.
© 2005 MPS. All Rights Reserved.
TM
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
V
DD
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.
© 2005 MPS. All Rights Reserved.
TM
TYPICAL PERFORMANCE CHARACTERISTICS
25
20
15
10
5
0
POUT (W)
5 101520253035
VDD (V)
MP7720-TPC10
P
OUT
vs
V
DD
100
90
80
70
60
50
40
30
20
10
0
EFFICIENCY (%)
0 5 10 15 20 25 30
OUTPUT POWER (W)
MP7720-TPC09
Efficiency vs
P
OUT
+4
+2
0
-2
-4
-6
-8
-10
AMPLITUDE (dBr)
20 10K 40K1K100
FREQUENCY (Hz)
MP7720-TPC08
Frequency Response
(Ref=2Vrms, A
V
=8.2)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
AMPLITUDE (dBr)
100 1K 10K
FREQUENCY (Hz)
MP7720-TPC07
0
-20
-40
-60
-80
-100
-120
-140
AMPLITUDE (dBV)
20 100 1K 10K
FREQUENCY (Hz)
MP7720-TPC06
THD+N (%)
FREQUENCY (Hz)
MP7720-TPC05
100
10
1
0.1
0.01
THD+N (%)
20 100 1K 10K
FREQUENCY (Hz)
MP7720-TPC04
THD+N (%)
POUT (W)
MP7720-TPC03
20
10
1
0.1
0.01
20
10
1
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
10
1
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.
© 2005 MPS. All Rights Reserved.
TM
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.