LX1721 データシートの表示（PDF） - Microsemi Corporation

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LX1721

Class-D Stereo Power Amplifier Controller

Microsemi Corporation 

INTEGRATED PRODUCTS

AudioMAX™

LX1721 / 1722

Class-D Stereo Power Amplifier Controller

PRODUCTION

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature -20°C < TA < 70°C (NOTE 2).

Test conditions: RPWM = 34.8k, CPWM = 100pF, VDD = PVDD = 15V

Parameter

Evaluation Module (See LXE1721)

Supply Voltage

LX1721

LX1722

Power Supply Rejection Ratio

Output Power (Per Channel)

Efficiency

Total Harmonic Distortion Plus Noise

Signal-To-Noise Ratio

Oscillator Section

Oscillator Frequency

Charge Current

Discharge Current

Oscillator Peak Voltage

Oscillator Valley Voltage

Voltage Stability

Temperature Stability

Error Amplifier

Input Offset Voltage

DC Open Loop Gain

Unity Gain Bandwidth

High Output Voltage

Low Output Voltage

Input Bias Current

Input Amplifier

Stage Gain

Output Voltage, High

Output Voltage, Low

Input Impedance

Feedback Amplifier

Stage Gain

LX1721

LX1722

Input Impedance

LX1721

LX1722

Symbol

Test Conditions

LX1721 / 1722

Min

Typ

Max

Units

VDD

PSRR

PO

THD+N

SNR

FOSC

ICHG

IDIS

VPK

VVAL

VIO

AOL

UGBW

VOH

VOL

IIN

VOH

VOL

7

7

VIN = 15V, VRIPPLE = 1VRMS, 20Hz

to 20kHz

VIN = 15V, RL=4Ω, THD+N=1%,

10Hz to 22kHz

VIN = 25V, RL=4Ω, THD+N=1%,

10Hz to 22kHz

VIN = 15V, fIN = 1kHz, PO = 10W

VIN = 15V, fIN = 1kHz, PO = 20W

fIN = 1kHz, PO = 1W

fIN = 20Hz to 20kHz, PO = 1W

RL = 4Ω, PO = 1W

(varies with VDD pin voltage)

(varies with VDD pin voltage)

(varies with VDD pin voltage)

(varies with VDD pin voltage)

VDD = 8V to 25V

TA = 0OC to 70OC

IOUT = -100µA

IOUT = +100µA

VIN = 1V to 4V

Set by Internal Resistors

IOUT = -100µA

IOUT = +100µA

3.5

3.465

3.85

-70

25

60

82

85

.06

81

450

-225

225

3.6

1.4

0.6

1.0

5

60

7

1

3.5

180

15

V

25

dB

W

%

%

.2

dBr

kHz

µA

µA

V

V

2

%

2

%

‘mV

dB

‘MHz

V

100

‘mV

µA

3.535

V/V

V

1.3

V

‘kΩ

Set by Internal Resistors

Set by Internal Resistors

89

91

56

57

250

400

93

‘mV/V

58

‘mV/V

kΩ

kΩ

Copyright © 2001

Rev. 1.2a,2004-06-10

Microsemi

Linfinity Microelectronics Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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