AudioMAX™
LX1721 / 1722
Class-D Stereo Power Amplifier Controller
P
RELIMINARY
L I N F I N I T Y D I V I S I O N
F U N C T I O N A L P I N
F U N C T I O N A L P I N
F U N C T I O N A L P I N
F U N C T I O N A L P I N D E S C R I P T I O N
D E S C R I P T I O N
D E S C R I P T I O N
D E S C R I P T I O N
P
IN
N
AME
D
ESCRIPTION
P
IN
N
AME
D
ESCRIPTION
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
A B S O L U T E M A X I M U M R A T
A B S O L U T E M A X I M U M R A T
A B S O L U T E M A X I M U M R A T
A B S O L U T E M A X I M U M R A T I N G S
I N G S
I N G S
I N G S
Supply Voltage (PVDD, VDD)..............................................................................................................................-0.3V to 30V
SLEEP
,
STATUS, R/LFBK+, R/LFBK-................................................................................................. -0.3V to VDD +0.3V
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.
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