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LX1721-01 EVAL KIT

P1-P3P4-P6P7-P9P10-P12P13-P14
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright © 2001
Rev. 1.2a,2004-06-10
WWW.Microsemi .COM
AudioMAX™ LX1721 / 1722
Class-D Stereo Power Amplifier Controller
P
RODUCTION
INTEGRATED PRODUCTS
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -20°C < T
A
< 70°C (NOTE 2).
Test conditions: RPWM = 34.8k, CPWM = 100pF, VDD = PVDD = 15V
LX1721 / 1722
Parameter Symbol Test Conditions
Min Typ Max
Units
Evaluation Module (See LXE1721)
Supply Voltage LX1721 7 15
LX1722
V
DD
7 25
V
Power Supply Rejection Ratio PSRR
V
IN
= 15V, V
RIPPLE
= 1V
RMS
, 20Hz
to 20kHz
-70 dB
V
IN
= 15V, R
L
=4, THD+N=1%,
10Hz to 22kHz
25
Output Power (Per Channel) P
O
V
IN
= 25V, R
L
=4, THD+N=1%,
10Hz to 22kHz
60
W
V
IN
= 15V, f
IN
= 1kHz, P
O
= 10W 82
Efficiency
V
IN
= 15V, f
IN
= 1kHz, P
O
= 20W 85
%
f
IN
= 1kHz, P
O
= 1W .06
Total Harmonic Distortion Plus Noise THD+N
f
IN
= 20Hz to 20kHz, P
O
= 1W .2
%
Signal-To-Noise Ratio SNR
R
L
= 4Ω, P
O
= 1W
81 dBr
Oscillator Section
Oscillator Frequency F
OSC
450 kHz
Charge Current I
CHG
(varies with V
DD
pin voltage) -225
µA
Discharge Current I
DIS
(varies with V
DD
pin voltage) 225
µA
Oscillator Peak Voltage V
PK
(varies with V
DD
pin voltage) 3.6 V
Oscillator Valley Voltage V
VAL
(varies with V
DD
pin voltage) 1.4 V
Voltage Stability V
DD
= 8V to 25V 0.6 2 %
Temperature Stability T
A
= 0
O
C to 70
O
C 1.0 2 %
Error Amplifier
Input Offset Voltage V
IO
5 ‘mV
DC Open Loop Gain A
OL
60 dB
Unity Gain Bandwidth UGBW 7 ‘MHz
High Output Voltage V
OH
I
OUT
= -100µA
3.5 V
Low Output Voltage V
OL
I
OUT
= +100µA
100 ‘mV
Input Bias Current I
IN
V
IN
= 1V to 4V 1
µA
Input Amplifier
Stage Gain Set by Internal Resistors 3.465 3.5 3.535 V/V
Output Voltage, High V
OH
I
OUT
= -100µA
3.85 V
Output Voltage, Low V
OL
I
OUT
= +100µA
1.3 V
Input Impedance 180
‘kΩ
Feedback Amplifier
Stage Gain LX1721 Set by Internal Resistors 89 91 93 ‘mV/V
LX1722 Set by Internal Resistors 56 57 58 ‘mV/V
Input Impedance LX1721 250
kΩ
LX1722 400
kΩ
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
Copyright © 2001
Rev. 1.2a,2004-06-10
WWW.Microsemi .COM
AudioMAX™ LX1721 / 1722
Class-D Stereo Power Amplifier Controller
P
RODUCTION
INTEGRATED PRODUCTS
ELECTRICAL CHARACTERISTICS (CONTINUED)
LX1721 / 1722
Parameter Symbol Test Conditions
Min Typ Max
Units
Current Limit Comparator
Voltage Sense Threshold 190 210 230 mV
Blanking Pulse Delay 500 ‘ns
Response Time Excluding blanking pulse 250 ‘ns
I
UM
Pulses required to Current Limit
Latch
4 4 4 ‘cycles
Consecutive Clear Pulses required to
reset I
UM
counter
2 2 2 ‘cycles
Reference Voltage Section
Initial Accuracy (VREF) 5.0
Voltage Stability (VREF) ± 50 ± 100 ‘mV
Initial Accuracy (V25) 2.5
Voltage Stability (V25) ± 25 ± 50 mV
Temperature Stability T
A
= 0
O
C to 70
O
C 2 5 ‘mV
Line Regulation V
DD
= 9V to 15V 0.5 ‘mV
Load Regulation I
OUT
= 0 to 10mA 5 ‘mV
Under Voltage Lockout Section
Start Threshold Voltage 6 V
UV Lockout Hysteresis 250 mV
UVLO Delay To Output Enable 62,500 clkcyc
Supply Current
Sleep Current
SLEEP Input = 0V, T
A
= 25
O
C
30
µA
Operating Current
SLEEP Input = 2V, V
IN
= 15V,
No MOSFETs connected
8 11 ‘mA
Sleep to Output Enable 62,500 clkcyc
Sleep Threshold 1.45 1.6 1.75 V
Mute Section
Mute Threshold 1.2 1.35 1.5 V
Output Drivers For N-Channel MOSFETs
I
SINK
= 3mA 30 100 ‘mV
NFET Drivers, Low Level Voltage V
OL
I
SINK
= 100mA 0.3 1.0 V
I
SOURCE
= 3mA, C
N
= 5.2V
applied externally
30 100 ‘mV
NFET Drivers, High Level Voltage V
OH
I
SOURCE
= 100mA, C
N
= 5.2V
applied externally
0.3 1.0 V
Output Drives For P-Channel MOSFETs
I
SINK
= 3mA 30 100 ‘mV
PFET Drivers, Low Level Voltage V
OL
I
SINK
= 100mA 0.5 1.0 V
I
SOURCE
= 3mA, C
P
= 5.2V
(applied externally)
30 100 ‘mV
PFET Drivers, High Level Voltage V
OH
I
SOURCE
= 100mA, C
P
= 5.2V
(applied externally)
0.5 1.0 V
Note 2: The LX1721 / 22CDB is guaranteed to meet performance specifications from 0° to 70°C. Specifications over the -20° to 0°C operation temperature
range are assured by design, characterization, and statistical process control.
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
Copyright © 2001
Rev. 1.2a,2004-06-10
WWW.Microsemi .COM
AudioMAX™ LX1721 / 1722
Class-D Stereo Power Amplifier Controller
P
RODUCTION
INTEGRATED PRODUCTS
BLOCK DIAGRAM
SLEEP
VREF
V25
CN
PVDD
CP
LP+
LN+
LP-
LN-
LFAOUT
LFBK-
LFBK+
VDD
LISN
CLOCK
RPWM
CPWM
LEAOUT
LEAIN
LAMPOUT
LIN-
LIN+
LMUTE
UVLO
&
REFERENCE
OUTPUT
DRIVERS
&
LOGIC
FAULT
TIMER
5V
Reference
28
10
7
17
CLK
OSC
SYNC
+
-
220mV
PVDD
MUX
MUTE
MUTE
11
5
6
13
4
12
2
3
8
42
41
1
44
FEEDBACK AMP
ERROR AMP
CURRENT SENSE
INPUT AMP
43
27,39
36
37
34
35
S
R
Q
Q
CLK
5V
Reference
40
2.5V
2.5V
FIGURE 1 – LX1721 / 22 SIMPLIFIED BLOCK DIAGRAM (LEFT CHANNEL CIRCUIT SHOWN)
B
B
L
L
O
O
C
C
K
K
D
D
I
I
A
A
G
G
R
R
A
A
M
M
P1-P3P4-P6P7-P9P10-P12P13-P14

LX1721-01 EVAL KIT

Mfr. #:
Buy LX1721-01 EVAL KIT
Manufacturer:
Microchip / Microsemi
Description:
KIT EVAL AMP STEREO CLASS D
Lifecycle:
New from this manufacturer.
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