LX1720 Просмотр технического описания (PDF) - Microsemi Corporation
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LX1720 Datasheet PDF : 6 Pages
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AudioMAXTM
PRODUCT DATABOOK 1996/1997
SWITCHING CLASS-D, STEREO POWER AMPLIFIER CONTROLLER IC
PRODUCTION DATA SHEET
LX1720
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C.
Test conditions: RT = 30k, CT = 100pF, VDD = PVDD = 15V.)
Parameter
Symbol
Test Conditions
Oscillator Section
Oscillator Frequency
Oscillator Peak Voltage
Oscillator Valley Voltage
Oscillator Max. Frequency
Voltage Stability
Temperature Stability
Error Amplifiers
Input Offset Voltage
DC Open Loop Gain
Unity Gain Bandwidth
High Output Voltage
Low Output Voltage
Input Common Mode Range
Input Bias Current
Input Amplifiers
Stage Gain
Input Impedance
Feedback Amplifiers
High Output Voltage
Low Output Voltage
Common Mode Rejection
Input Common Mode Range
Input Impedance
Stage Gain
LX1720-01
Current Limit Comparators
Voltage Sense Threshold
Comparator Response Time
PWM Comparators
CPWM Delay To Output
PWM Current Generator
CPWM Charge Current
Impedance of Internal Discharge FET
IOUT = -100µA
IOUT = +100µA
Set by Internal Resistors
IOUT = -250µA
IOUT = +250µA
Set by Internal Resistors
RPWM = 75k
LX1720
Min. Typ. Max.
280 330 380
2.5
200
1
1
2
2
5
60
7
4
50
1
5
1
3.465 3.5 3.535
42
4
50
70
0
V
DD
388
89
91
93
200 220 240
500
250
75
20
Units
kHz
V
mV
MHz
%
%
mV
dB
MHz
V
mV
V
µA
V/V
kΩ
V
mV
dB
V
kΩ
mV/V
mV
nsec
nsec
µA
Ω
Output Drivers For The N-Channel MOSFETs
Ext. NFET Drivers, Low Level Voltage
VOL
ISINK = 3mA
ISINK = 75mA
Ext. NFET Drivers, High Level Voltage
VOH
ISOURCE = 3mA
ISOURCE = 75mA, CN = 5.2V (applied externally)
Output Drivers For The P-Channel MOSFETs
Ext. PFET Drivers, Low Level Voltage
Ext. PFET Drivers, High Level Voltage
VOL
ISINK = 3mA
ISINK = 75mA
VOH
ISOURCE = 3mA
ISOURCE = 75mA, CP = 5.2V (applied externally)
30 100
mV
1
1.5
V
30 100
mV
1
1.5
V
30 100
mV
1
1.5
V
30 100
mV
1
1.5
V
Copyright © 1999
Rev. 1.0 9/99
3
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