Microsemi

Linfinity Microelectronics Division

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

Page 3

Copyright

 2001

Rev. 1.1,2003-06-10

AudioMAX™

LX1721 / 1722

Class-D Stereo Power Amplifier Controller

I N T E GRA T ED

PR ODUC T S

FUNCTIONAL PIN DESCRIPTION

LFAOUT

Left Feedback Amplifier Output

LFBK-

Left Feedback Amplifier Inverting Input

CPWM

PWM Capacitor Connection

LFBK+

Left Feedback Amplifier Non-Inverting

Input

RPWM

PWM Resistor Connection

LISN

Left Current Limit Sense Input

LMUTE

Left Mute Input (Active High)

VDD

Analog Supply Voltage

LEAOUT

Left Error Amplifier Output

CN

Supply Decoupling for NFET Drivers

LEAIN

Left Inverting Input of Error Amplifier

PVDD

Output Driver Supply Voltage

VREF

5V Reference

PGND

Output Driver High Current Ground

CLOCK

Input / Output Clock for Synch Operation

LN+

Left Drive for NFET on Positive Half of

Bridge

GND

Low Current Ground

LP+

Left Drive for PFET on Positive Half of

Bridge

V25

2.5V Reference

LP-

Left Drive for PFET on Negative Half of

Bridge

LIN+

Left Positive Audio Input

LN-

Left Drive for NFET on Negative Half of

Bridge

LIN-

Left Negative Audio Input

RN-

Right Drive for NFET on Negative Half of

Bridge

LAMPOUT

Left Input Amplifier Output

RP-

Right Drive for PFET on Negative Half of

Bridge

RIN+

Right Positive Audio Input

RP+

Right Drive for PFET on Positive Half of

Bridge

RIN-

Right Negative Audio Input

RN+

Right Drive for NFET on Positive Half of

Bridge

RAMPOUT

Right Input Amplifier Output

PGND

Output Driver High Current Ground

SLEEP

Sleep Input (active low)

CP

Supply Decoupling for PFET Drivers

STATUS

UVLO Indicator (Open Collector Output)

PVDD

Output Driver Supply Voltage

RMUTE

Right Mute Input (Active High)

NC

No Connect

REAIN

Right Inverting Input of Error Amplifier

RISN

Right Current Limit Sense Input

REAOUT

Right Error Amplifier Output

RFBK+

Left Feedback Amplifier Non-Inverting

Input

RFAOUT

Right Feedback Amplifier Output

RFBK-

Right Feedback Amplifier Inverting Input

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (PVDD, VDD) ............................................................................................................................. -0.3V to 30V

R/LISN .........................................................................................................................................PVDD –2 to PVDD to +0.3V

RPWM, CPWM, R/LMUTE ................................................................................................................... -0.3V to VREF +0.3V

R/LIN+, R/LIN-, R/LAMPOUT.............................................................................................................. -0.3V to VREF +0.3V

R/LEAIN, R/LEAOUT, R/LFAOUT ..................................................................................................... -0.3V to VREF + 0.3V

CLOCK ........................................................................................................................................................-0.3V to CN +0.3V

Operating Junction Temperature Plastic........................................................................................................................... 125°C

Storage Temperature Range ...............................................................................................................................-65°C to 150°C

Lead Temperature (Soldering, 10 seconds)...................................................................................................................... 300°C

Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into negative out of the

specified terminal.