MP1720DQ-3-LF-P Datasheet MP1720DQ-3-LF-P, MP1720DQ-3-LF-Z, MP1720DH-216-LF-P | P4-P6

MP1720 – 2.7W LOW EMI HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY

MP1720 Rev. 1.02 www.MonolithicPower.com 4

7/5/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

OPERATION CHARACTERISTICS

TEST SET-UP GRAPH, VIN = PVIN = SHDN=3.3V, DGND = PGND = 0V, CLK = DGND

(f

CLK

=1.0MHz), R

Load

= 4Ω, Gain=12dB, T

A

= +25C, unless otherwise noted

(6)

.

Parameter Symbol Conditions Min Typ Max Unit

Output Power P

OUT

THD+N=1%,

R

Load

=4

V

IN

=5.0V 2.14

W

V

IN

=3.3V 0.87

V

IN

=2.5V 0.48

THD+N=10%,

R

Load

=4

V

IN

=5.0V 2.78

V

IN

=3.3V 1.18

V

IN

=2.5V 0.64

THD+N=1%,

R

Load

=8

V

IN

=5.0V 1.19

W

V

IN

=3.3V 0.55

V

IN

=2.5V 0.31

THD+N=10%,

R

Load

=8

V

IN

=5.0V 1.56

V

IN

=3.3V 0.71

V

IN

=2.5V 0.40

Total Distortion Pulse

Noise

THD+N

P

OUT

=2W, V

IN

=5.0V 0.15%

P

OUT

=0.8W V

IN

=3.3V 0.13%

P

OUT

=0.4W V

IN

=2.5V 0.13%

Supply Ripple

Rejection Ratio

(7)

K

SVR

f

S

=217Hz,

V

Ripple

=300mV

PP

,

input AC-ground

V

IN

=3.3V -60 dB

Signal to Noise Ratio SNR

V

OUT

=2 V

RMS

A-weighted

V

IN

=3.3V 91.3 dB

Output Noise V

n

V

IN

=3.3V, f

s

=20Hz

to 20kHz, input AC-

grounded

No weighting 72

V

RMS

A weighting 53

Common Mode

Rejection Ratio

(8)

CMRR

Vic

RIPPLE

=300mV

PP

,

f

s

=1kHz

V

IN

=3.3V -62 dB

MP1720 – 2.7W LOW EMI HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY

MP1720 Rev. 1.02 www.MonolithicPower.com 5

7/5/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

PIN FUNCTIONS

Pin # Name Description

1 VIN Analog Power Supply

2 INP Positive differential input

3 INN Negative differential input

4 DGND Analog Ground

5

SHDN

Shutdown input (drive high to enable the MP1720)

6 CLK

Frequency select and external clock input;

CLK=GND: Operate frequency f

CLK

=1.0MHz

CLK=FLOAT: Operate frequency f

CLK

=1.3MHz

CLK=Clocked: Operate frequenc

y

f

CLK

=external clock frequenc

y

7 PGND Power Ground

8 OUTP Positive BTL output

9 OUTN Negative BTL output

10 PVIN Power Supply

Thermal Pad Must be soldered to a ground on PCB

MP1720 – 2.7W LOW EMI HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY

MP1720 Rev. 1.02 www.MonolithicPower.com 6

7/5/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

FUNCTIONAL BLOCK DIAGRAM

Control Logic

UVLO

SHDN

5

Power Supply

VIN

PVIN

1

10

INP

INN

OSC

PLL

FREQUENCY

SELECT

6

CLK

LOGIC

PVIN

PGND

OUTP

OUTN

8

9

U2

--

+

U3

--

+

U1

--

+

--

+

R3

R4

R1

R2

2

3

START UP OTP OCP

PGND DGND

74

MP1720

Figure 1—MP1720 Functional Block Diagram

TYPICAL PERFORMANCE CHARACTERISTICS

TEST SET-UP GRAPH

MP1720

VIN

INP

INN

DGND

SHDN

PVIN

PGND

OUTP

OUTN

CLK

+

-

Measurement

Output

+

-

Measurement

Input

load

1uF

0.1uF

10uF

15uH

33nF

0.15uF

22ohm

68nF

Notes:

6) The 70kHz low-pass filter is required even if the analyzer has a low-pass filter.

7) For PSRR test, Please remove the 10uF decoupling capacitor and just keep the small decoupling capacitors for recovery switching

currents.

8) CIN was shorted for any Common-Mode input voltage measurement.

MP1720DQ-3-LF-P

MP1720DQ-3-LF-P

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