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AD1991 bảng dữ liệu(PDF) 2 Page - Analog Devices

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Giải thích chi tiết về linh kiện  Class D/1-Bit Audio Power Output Stage
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AD1991 bảng dữ liệu(HTML) 2 Page - Analog Devices

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AD1991–SPECIFICATIONS1
Parameter
Min
Typ
Max
Unit
Test Conditions
OUTPUT POWER PO (f = 1 kHz SINE WAVE)
2
20
W
RL = 4
Ω, PV
DDX = 14 V
20
W
RL = 8
Ω, PV
DDX = 20 V
EFFICIENCY
87
%
f = 1 kHz, PO = 20 W, RL = 8
RON
Per High-Side Transistor
260
320
m
@ 1 A
Per Low-Side Transistor
190
235
m
@ 1 A
Temperature Coefficient
0.7
m
Ω/°C
THERMAL WARNING ACTIVE
135
°CDie temperature
THERMAL SHUTDOWN ACTIVE
150
°CDie temperature
OVERCURRENT SHUTDOWN ACTIVE
3.8
5
6.75
A
POWER SUPPLIES
Supply Voltage AVDD
4.5
5.0
5.5
V
Supply Voltage DVDD
4.5
5.0
5.5
V
Supply Voltage PVDDX
6.5
8 to 20
22.5
V
Power-Down Current
AVDD
614
µA
RST/PDN held low
DVDD
113
µA
RST/PDN held low
PVDDX
17
µA
RST/PDN held low
Operating Current
AVDD
1.8
2.75
mA
DVDD
4
5.2
mA
PVDDX
40
mA
50:50 384 kHz square wave on
INA and INC
DIGITAL I/O
Input Voltage High
2.0
DVDD
V
Input Voltage Low
1.2
V
Output Voltage High
DVDD – 0.8
V
@ 2 mA
Output Voltage Low
0.4
V
@ 2 mA
Leakage Current on Digital Inputs
10
µA
NOTES
1Performance of both channels is identical.
2Measurement requires PWM modulator.
Specifications subject to change without notice.
DIGITAL TIMING CHARACTERISTICS
Symbol
Parameter
Min
Typ
Max
Unit
tPDL
Input transition to output initial response
30
ns
tPST
Power transistor switching time
3.5
ns
tNOL
Nonoverlap time
25 to 40
ns
tPDRP
RST/PDN minimum low pulsewidth
20
ns
tMSU
Mode pin setup time before
RST/PDN going high
5
ns
tMH
Mode pin hold time after
RST/PDN going high
5
ns
tMPDL
MUTE asserted to output initial response
3
s
Specifications subject to change without notice.
(Guaranteed over –40 C to +85 C, AVDD = DVDD = 5 V
10%, PVDDX = 20 V
10%,
Edge Speed = Slowest, Nonoverlap Time = Shortest.)
(AVDD = 5 V, DVDD = 5 V, PVDDX = 20 V, Ambient Temperature = 25 C,
Load Impedance = 8
, unless otherwise noted.)


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