MP7722 – 2 x 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER
OPERATING SPECIFICATIONS
Circuit of Figure 1, V
DD
= 24V, V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters
Power Output
Symbol Condition
f = 1KHz, THD+N = 10%,
4Ω Load
f = 1KHz, THD+N = 10%,
8Ω Load
P
OUT
= 1W, f = 1KHz, 4Ω
Load
P
OUT
= 1W, f = 1KHz, 8Ω
Load
f = 1KHz, P
OUT
= 1W, 4Ω
Load
f = 1KHz, P
OUT
= 1W, 8Ω
Load
Min
Typ
20
10
0.16
0.06
90
95
20
93
190
60
Max
Units
W
W
%
%
%
%
KHz
dB
µV
dB
THD+ Noise
Efficiency
Maximum Power Bandwidth
Dynamic Range
Noise Floor
Power Supply Rejection
A-Weighted
f = 1KHz
PIN FUNCTIONS
Pin #
1, 5, 11,
16
2
3
4
6
7
8
9
10
12
13
14
15
Name
NC
REF1
IN1
EN1
IN2
REF2
Description
No Connect. Not internally connected
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.
Amplifier 1 Input. IN1 is the inverting input for amplifier 1.
Enable Input 1. EN1 must be connected to EN2. Drive EN1 high to enable MP7722; low to
disable it.
Amplifier 2 Input. IN2 is the inverting input for amplifier 2.
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.
Enable Input 2. EN2 must be connected to EN1. Drive high to enable MP7722, drive low to
disable.
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.
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.
Switched Power Output. SW2 is the output of Amplifier 2. Connect the LC filter to this pin.
AGND1 Analog Ground 1. Connect AGND1 to AGND2.
AGND2 Analog Ground 2. Connect AGND2 to AGND1.
EN2
BS2
VDD2
SW2
PGND2 Power Ground for Amplifier 2. Connect PGND2 to PGND1.
MP7722 Rev. 1.3
9/25/2006
www.MonolithicPower.com
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© 2006 MPS. All Rights Reserved.
3
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