MPS EV7741DQ-00A User manual

EV7741DQ-00A
2x10W Stereo Single Ended Class D
Audio Amplifier Evaluation Board
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 1
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© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The EV7741DQ-00A is the evaluation board for
the MP7741, a 10W mono Class D Audio
Amplifier. It is one of MPS’ products of fully
integrated audio amplifiers which dramatically
reduce solution size by integrating the following:
•250mpower MOSFETs
•Startup / Shutdown pop elimination
•Short circuit protection circuits
The MP7741 utilizes a single ended output
structure capable of delivering 10W into 8
speakers. MPS Class D Audio Amplifiers exhibit
the high fidelity of a Class A/B amplifier at high
efficiency. The circuit is based on the MPS’
AAMTM proprietary variable frequency topology
that delivers excellent linearity, fast response
time and operates on a single power supply.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Supply Voltage VDD 9.5~36 V
FEATURES
•2 x 10W Output at VDD = 24V into a 8load
•THD+N = 0.02% at 1W, 8, 1kHz
•94% Efficiency at 10W and VDD=24V with
8load
•Low Noise (103µV Typical)
•9.5V to 36V Operation from a Single Supply
APPLICATIONS
•Flat Panel TV
•Portable Docking Stations
•Surround Sound DVD Systems
•Televisions
•Multimedia Computers
•Home Stereo Systems
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
A
AM (Analog Adaptive Modulation) is a Trademark of Monolithic Power
Systems, Inc.
EV7741DQ-00A EVALUATION BOARD
(L x W x H) 3.5” x 2.5” x 1.2”
9.0cm x 6.3cm x 3.0cm
Board Number MPS IC Number
EV7741DQ-00A MP7741DQ
THD + N (%)
P
OUT
(W)
50m 20100m 1 10
0.01
20
0.02
0.05
0.1
0.2
0.5
1
2
5
10

EV7741DQ-00A –2X10W STEREO SINGLE ENDED CLASS D AUDIO AMPLIFIER EVALUATION BOARD
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 2
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© 2011 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
NIN
2
Timer
3
AGND
4
SW 9
BS 8
VDD 7
PIN
1
EN
5
PGND 10
UVP 6
M P7741
U1
1
2, 3, 4
CN2
NS
R1
12
C2
10k
R3 5.6nF
C6
12
C4
10k
R19
C24
C12
VCC
34.8k
R7
10k
R8
1N4148WS
12
D3
VCC1
C14
BZT52C6V2S
12
D1
10
R14
390pF
C16
13RHBP-A7502HY-100M
L1
C18
1 2
C20
VCC1
10k
R21
9.53k
R25
C22
OUT1
Left-Speaker
82.5k
R5
22pF
C10
NIN
2
Timer
3
AGND
4
SW 9
BS 8
VDD 7
PIN
1
EN
5
PGND 10
UVP 6
MP7741
U2
1
2, 3, 4
CN3
NS
R2
12
2. 2 F
C3
10 k
R4
12
10 F
C5
10 k
R20
0. 1
C25
C13
VCC
34.8k
R11
10 k
R12
1N4148WS
12
D4
VCC2
C15
BZT52C6V2S
12
D2
10
R15
390pF
C17
13RHBP-A7502HY-100M
L2
C19
1 2
C21
VCC2
10 k
R22
9.53k
R26
C23
OUT2
Right-Speaker
82.5k
R6
22pF
C11
CN1
VCC
1
2
C1
VCC
100k
R9
R10
25.5k 25.5k
R18
2 5
3 4
1 6
SW1
200k
R13
EN
EN
EN
EXT.ENABLE
GND
DISABLE/EXT.ENABLE
ENABLE SWITCH
ENABLE
NS
C9
NS
C8
20k
R24
20k
R23
VCC2
VCC1
4. 7 n F
C7
C27
C26
10
R16
10
R17
FB1
FB2

EV7741DQ-00A –2X10W STEREO SINGLE ENDED CLASS D AUDIO AMPLIFIER EVALUATION BOARD
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 3
1/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
EV7741DQ-00A BILL OF MATERIALS
Qty Ref Value Description Package Manufacturer Manufacturer P/N
1 C1 2200µF
Electrolytic Capacitor;
50V DIP Rubycon
2 C2, C3 2.2µF
Electrolytic Capacitor;
50V DIP Rubycon
2 C4, C5 10µF
Electrolytic Capacitor;
50V DIP Rubycon
1 C6 5.6nF
Ceramic Capacitor;
50V; X7R; 0603 0603 muRata GRM188R71H562KA01
1 C7 4.7nF
Ceramic Capacitor;
50V; X7R; 0603 0603 muRata GRM188R71H472KA01D
2 C8, C9 NS 0603
2 C10, C11 22pF
Ceramic Capacitor;
50V; C0G; 0603 0603 TDK C1608C0G1H220J
2 C12, C13 1µF
Ceramic Capacitor;
16V; X7R; 0805 0805 muRata GRM21BR71C105KA01
2 C14, C15 2.2µF
Ceramic Capacitor;
50V; X7R; 1206 1206 muRata GRM31CR71H225KA88L
2 C16, C17 390pF
Ceramic Capacitor;
50V; C0G; 0603 0603 muRata GRM1885C1H391JA01D
2 C18, C19 0.47µF CBB Capacitor; 50V DIP Panasonic
2 C20, C21 1000µF
Electrolytic Capacitor;
50V DIP Rubycon
2 C22, C23 0.1µF
Ceramic Capacitor;
50V; X7R; 0603 0603 muRata GRM188R71H104KA93D
2 C24, C25 0.1µF
Ceramic Capacitor;
16V; X7R; 0603 0603 muRata GRM188R71C104KA01D
2 C26, C27 2.2µF
Ceramic Capacitor;
10V; X7R; 0603 0603 muRata GRM188R71A225KE15
2 D1, D2
BZT52
C6V2S
Zener Diode; 6.2V;
5mA/200mW SOD-323 Diodes BZT52C6V2S-7-F
2 D3, D4
1N414
8WS Diode; 75V; 0.15A SOD-323 Diodes 1N4148WS-7-F
2 FB1, FB2 Magnetic Bead 1206 LION PB321611-320
2 L1, L2 10µH
Inductor; 10µH;
18m; 3.61A DIP TOKO 13RHBP-A7502HY-100M
2 R1, R2 NS 0603
8
R3, R4,
R8, R12,
R19, R20,
R21,R22
10kFilm Resistor; 1% 0603 Royalohm 0603F1002T5E
2 R5, R6 82.5kFilm Resistor; 1% 0603 Yageo RC0603FR-0782K5L
2 R7, R11 34.8kFilm Resistor; 1% 0603 Yageo RC0603FR-0734K8L
1 R9 100kFilm Resistor; 1% 0603 Royalohm 0603F1003T5E
2 R10, R18 25.5kFilm Resistor; 1% 0603 Yageo RC0603FR-0725K5L
1 R13 200kFilm Resistor; 5% 0603 Yageo RC0603JR-07200KL
2 R14, R15 10Film Resistor; 1% 0603 Yageo RC0603FR-0710RL
2 R16, R17 10Film Resistor; 1% 1206 Yageo RC1206FR-0710RL

EV7741DQ-00A –2X10W STEREO SINGLE ENDED CLASS D AUDIO AMPLIFIER EVALUATION BOARD
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 4
1/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
EV7741DQ-00A BILL OF MATERIALS (continued)
Qty Ref Value Description Package Manufacturer Manufacturer P/N
2 R23, R24 20kFilm Resistor; 1% 0603 Yageo RC0603FR-0720KL
2 R25, R26 9.53kFilm Resistor; 1% 0603 Yageo RC0603FR-079K53L
1 SW1 DPDT Slide Switch DIP Any
1 CN1
Connector; Red and
Black Any
2 CN2, CN3 RCA Connector DIP Any
2 OUT1,
OUT2 Connector DIP Any
2 U1, U2 Class D Audio Amplifier QFN10 MPS MP7741DQ

EV7741DQ-00A –2X10W STEREO SINGLE ENDED CLASS D AUDIO AMPLIFIER EVALUATION BOARD
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 5
1/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer Figure 2—Top Layer
Figure 3—Bottom Silk Layer (Mirror) Figure 4—Bottom Layer (Mirror)

EV7741DQ-00A –2X10W STEREO SINGLE ENDED CLASS D 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.
EV7741DQ-00A Rev. 1.0 www.MonolithicPower.com 6
1/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
QUICK START GUIDE
This board is set up from the factory for 24V operation. To use with 36V (12V) power supply, adjust the
components as specified in the 36V (12V) Operation Modifications section below. For more information,
consult the MP7741 datasheet.
Figure 5—EV7741DQ-00A Connection Diagram
1. Power Requirements
a. Power supply: 9.5V to 36V, 3A maximum.
b. 0V to 1.5VRMS (max) audio signal source.
c. Speaker: typically 8;
2. Setup Condition for 24V Operation
a. Adjust the power supply to 24V (do not turn on).
b. Connect the outputs to the external speakers.
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 (CN2, CN3).
f. Turn on the power supply.
3. 36V Operation Modifications
a. Change C6 to 8.2nF and C7 to 6.8nF.
b. Change R7 & R11 to 64.9k to set 30V VDD shutdown voltage.
c. Adjust the power supply to 36V (do not turn on).
d. Do as step b~f specified in Section 2.
4. 12V Operation Modifications
a. Change C6 to 3.3nF and C7 to 2.2nF.
b. Change R7 & R11 to 15kto set 10V VDD shutdown voltage.
c. Remove R18 to make sure EN signal is high enough @ 12V VDD.
d. Adjust the power supply to 12V (do not turn on).
e. Do as step b~f specified in Section 2.
5. Music Turn-On Sequence
Set the enable switch to the ENABLE position.
6. Music Turn-Off Sequence
a. Set the enable switch to the DISABLE position.
b. Turn off the power supply.