LX1725ILQ Microsemi Analog Mixed Signal Group, LX1725ILQ Datasheet - Page 2

• Manufacturer Part Number: LX1725ILQ
• Description: IC AMP AUDIO 32W STER D 32MLPQ
• Manufacturer: Microsemi Analog Mixed Signal Group
• Series: AudioMAX™r
• Type: Class Dr

Specifications of LX1725ILQ

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 32W x 1 @ 8 Ohm; 16W x 2 @ 4 Ohm
• Voltage - Supply: 12 V ~ 35 V, ±6 V ~ 17.5 V
• Features: Depop, Differential Inputs, Mute, PWM, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 32-MLPQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 2004
Rev. 1.2, 2005-12-06
VCOMA
VPOSA
COSC
Supply Voltage (VPOS/VNEG, VPOSA/VNEGA)......................... -0.3V to ±15V or 30V
Common Supply Voltage (VCOM, VCOMA)................................. -0.3V to ±15V or 30V
Analog Supply Voltage (V5V)..........................................................................-0.3 to 7.0V
Input Voltage (IN1P, IN1M, IN2P, IN2M).......................................................-0.3 to 7.0V
Standby and Mute Voltage (STBY, MUTE).....................................................-0.3 to 7.0V
Synchronization Input Voltage (MASTER, SYNC) .........................................-0.3 to 7.0V
Operating Temperature ...............................................................................-40°C to +85°C
Maximum Operating Junction Temperature ............................................................. 150°C
Storage Temperature................................................................................... -65°C to 150°C
Peak Package Solder Reflow Temp.(40 second maximum exposure) ......... 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with
SYNC
Junction Temperature Calculation: T
The θ
above assume no ambient airflow.
FLAG
RILIM
VREF
Name
LQ
THERMAL RESISTANCE
THERMAL RESISTANCE
JA
TM
respect to Ground. Currents are positive into, negative out of specified terminal.
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
Plastic MLPQ 32-Pin
Analog voltage sense for VPOS voltage. Needs to be protected from noise at VPOS1 and VPOS2. Connect to
VPOS bus with appropriate filtering. For VPOSA – VNEGA less than 10V, the under voltage lockout circuit will
keep the part in sleep mode. Typically 250µA is drawn at this pin.
Analog voltage sense for VCOM voltage. Typically 150µA is drawn at this pin.
Bi-directional clock signal pin. In Master mode, this pin outputs the clock to other slave units. In Slave mode,
this pin is a clock input. CMOS logic levels.
Monitor point that indicates a fault has been detected. This pin goes high during the power on reset period, when
current limiting is in effect, when the voltage at VPOS – VNEG is less than 10V or greater than 33V, when the
V5V voltage is less than 4V, and when an over-temperature condition is detected. CMOS logic levels.
A current limit-programming resistor should be connected between this pin and ground. A 50KΩ resistor will give
a 3.75A current limit threshold. This pin may be connected to V5V in which case both current limiting protection
and over-voltage protection will be disabled.
2.25V reference voltage, used as a local “gnd” reference. Place a decoupling capacitor greater than 1µF
between this pin and VGND. This pin will be prone to instability for capacitor values less than this. In
applications where more several LX1725s are synchronized together, the VREF pins should all be tied together
so that all units use a common VREF voltage.
Place a capacitor between this pin and VGND to generate the PWM triangle wave. A 125pF capacitor will give
an oscillation frequency of about 373KHz. In Master mode, this pin serves as the output for the triangle wave. In
Slave mode, this pin is an input. The total capacitance on this pin will determine the frequency of oscillation.
A B S O L U T E M A X I M U M R A T I N G S
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
-
-
JUNCTION TO
JUNCTION TO
T H E R M A L D A T A
J
= T
A
+ (P
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
x θ
C
A
JA
ASE
MBIENT
).
, θ
Integrated Products Division
JC
, θ
®
Microsemi
JA
Description
15W+15W Stereo Class-D Amplifier
1.12°C/W
15.5°C/W
Filterless 30W Mono in BTL
P
RODUCTION
VCOMA
VPOSA
VNEGA
RoHS / Pb-free 100% Matte Tin Lead Finish
COSC
SYNC
FLAG
RILIM
VREF
P A C K A G E P I N O U T
D
N.C. – No Internal Connection
ATA
1
2
3
4
5
6
7
8
32
9
Center Pad is VNEG
31
10
S
LQ P
HEET
30
11
(Top View)
29
12
ACKAGE
28
13
14
27
15
26
LX1725
16
25
24
23
22
21
20
19
18
17
STBY
VPOS1
OUT1
VNEG1
VNEG2
OUT2
VPOS2
MASTER
Page
2