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MP7722DF-LF-Z

P1-P3P4-P6P7-P9P10-P12
MP7722
2 x 20W Class D Stereo
Single Ended Audio Amplifer
MP7722 Rev. 1.5 www.MonolithicPower.com 1
1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP7722 is a stereo 2 x 20W Class D Audio
Amplifier. It is one of MPS’ second generation
fully integrated audio amplifiers which
dramatically reduces solution size by integrating
the following:
180m power MOSFETs
Startup / Shutdown pop elimination
Short circuit protection
Mute / Standby
The MP7722 utilizes a single ended output
structure capable of delivering 2 x 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’ proprietary variable
frequency topology that delivers low distortion,
fast response time and operates on a single
power supply.
FEATURES
• 2 x 20W Output at V
DD
= 24V into a 4 load
• THD+N = 0.06% 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 and Short Circuit Protection
• Integrated 180m Switches
• Mute/Standby Modes (Sleep)
• Thermally Enhanced 20-Pin TSSOP
Package with Exposed Pad
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.
TYPICAL APPLICATION
MP7722
BS1
SW1
BS2
SW2
REF1
2
V
DD
3
8
CH1
INPUT
7
6
10
4
9
CH1
OUTPUT
CH2
OUTPUT
14
18
20
13
15
12
19
17
IN1
REF2
IN2
EN2
EN1
AGND2
AGND1
PGND2
VDD2
V
DD
CH2
INPUT
EN
PGND1
VDD1
10
1
0.1
0.01
THD+N (%)
0.1 1 10
OUTPUT POWER (W)
THD+N vs Output Power
24V, f = 1KHz
MP7722 – 2 x 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER
MP7722 Rev. 1.5 www.MonolithicPower.com 2
1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
PACKAGE REFERENCE
Part Number* Package Temperature
MP7722DF TSSOP20F
–40°C to +85°C
*
For Tape & Reel, add suffix –Z (eg. MP7722DF–Z)
For Lead Free, add suffix –LF (eg. MP7722DF–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
DD
...................................... 26V
BS Voltage.................. V
SW
– 0.3V to V
SW
+ 6.5V
Enable Voltage V
EN
........................ –0.3V to +6V
V
SW
, V
PIN
, V
NIN
........................... –1V to V
DD
+ 1V
AGND to PGND.......................... –0.3V to +0.3V
Junction Temperature............................... 150
°C
Lead Temperature ....................................260°C
Storage Temperature ..............–65°C to +150°C
Recommended Operating Conditions
(2)
Supply Voltage V
DD
.......................... 9.5V to 24V
Operating Temperature T
A
.........–40°C to +85°C
Thermal Resistance
(3)
θ
JA
θ
JC
TSSOP20F ............................. 40....... 6.... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
V
DD
= 24V, V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Supply Current
Standby Current V
EN
= 0V 2 10 µA
Quiescent Current 3 6 mA
Output Drivers
SW On Resistance Sourcing and Sinking 0.18
Short Circuit Current Sourcing and Sinking 5.0 A
Inputs
REF1/2, IN1/2 Input Common
Mode Voltage Range
0
V
DD
2
V
DD
– 1.5 V
REF1/2, IN1/2 Input Current V
PIN
= V
NIN
= 12V 1 5 µA
V
EN
Rising 1.4 2.0 V
EN Enable Threshold Voltage
V
EN
Falling 0.4 1.2 V
EN Enable Input Current V
EN
= 5V 1 µA
Thermal Shutdown
Thermal Shutdown Trip Point T
J
Rising 150
°C
Thermal Shutdown Hysteresis 30
°C
Standby Current V
EN
= 0V 260 µA
Quiescent Current 23 mA
NC
REF1
IN1
AGND1
NC
EN1
IN2
REF2
AGND2
EN2
TOP VIEW
EXPOSED PAD
(CONNECT TO PGND)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
PGND1
SW1
VDD1
BS1
NC
PGND2
SW2
VDD2
BS2
NC
MP7722 – 2 x 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER
MP7722 Rev. 1.5 www.MonolithicPower.com 3
1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
OPERATING SPECIFICATIONS
Circuit of Figure 1, V
DD
= 24V, V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
f = 1KHz, THD+N = 10%,
4 Load
20 W
Power Output
f = 1KHz, THD+N = 10%,
8 Load
10 W
P
OUT
= 1W, f = 1KHz, 4
Load
0.16 %
THD+ Noise
P
OUT
= 1W, f = 1KHz, 8
Load
0.06 %
f = 1KHz, P
OUT
= 1W, 4
Load
90 %
Efficiency
f = 1KHz, P
OUT
= 1W, 8
Load
95 %
Maximum Power Bandwidth 20 KHz
Dynamic Range 93 dB
Noise Floor A-Weighted 190 µV
Power Supply Rejection f = 1KHz 60 dB
PIN FUNCTIONS
Pin # Name Description
1, 5, 11,
16
NC No Connect. Not internally connected
2 REF1
Amplifier 1 Reference. REF1 is the reference point for amplifier 1. Use a resistive voltage
divider to set the voltage at REF1 to V
DD
/2.
3 IN1 Amplifier 1 Input. IN1 is the inverting input for amplifier 1.
4 AGND1 Analog Ground 1. Connect AGND1 to AGND2.
6 EN1
Enable Input 1. EN1 must be connected to EN2. Drive EN1 high to enable MP7722; low to
disable it.
7 IN2 Amplifier 2 Input. IN2 is the inverting input for amplifier 2.
8 REF2
Amplifier 2 Reference. REF2 is the reference point for amplifier 2. Use a resistive voltage
divider to set the voltage at REF1 to V
DD
/2.
9 AGND2 Analog Ground 2. Connect AGND2 to AGND1.
10 EN2
Enable Input 2. EN2 must be connected to EN1. Drive high to enable MP7722, drive low to
disable.
12 BS2
High-Side MOSFET Bootstrap Input for Amplifier 2. A capacitor from BS2 to SW2 supplies
the gate drive current to the internal high-side MOSFET. Connect a 1µF capacitor from
SW2 to BS2.
13 VDD2
Power Supply Input. Bypass VDD2 to PGND2 with a 1µF X7R capacitor (in addition to the
main bulk capacitor), placed close to the IC PIN13 and PIN15.
14 SW2 Switched Power Output. SW2 is the output of Amplifier 2. Connect the LC filter to this pin.
15 PGND2 Power Ground for Amplifier 2. Connect PGND2 to PGND1.
P1-P3P4-P6P7-P9P10-P12

MP7722DF-LF-Z

Mfr. #:
Buy MP7722DF-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Audio Amplifiers 2x20W Class-D Single Ended Stereo Amp
Lifecycle:
New from this manufacturer.
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