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參數(shù)資料
| 型號： | NCP9004 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 2.65 W Filterless Class−D Audio Power Amplifier |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 323K |
| 代理商： | NCP9004 |
NCP9004
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
(Limits apply for T
A
= +25
°
C unless otherwise noted)
Symbol
Characteristic
Unit
Max
Typ
Min
Conditions
Efficiency
R
L
= 8.0 , f = 1.0 kHz
V
p
= 5.0 V, P
out
= 1.2 W
V
p
= 3.6 V, P
out
= 0.6 W
91
90
%
R
L
= 4.0 , f = 1.0 kHz
V
p
= 5.0 V, P
out
= 2.0 W
V
p
= 3.6 V, P
out
= 1.0 W
82
81
%
THD+N
Total Harmonic Distortion + Noise
V
p
= 5.0 V, R
L
= 8.0 ,
f = 1.0 kHz, P
out
= 0.25 W
V
p
= 3.6 V, R
L
= 8.0 ,
f = 1.0 kHz, P
out
= 0.25 W
0.05
0.09
%
CMRR
Common Mode Rejection Ratio
V
p
from 2.5 V to 5.5 V
V
ic
= 0.5 V to V
p
0.8 V
V
p
= 3.6 V, V
ic
= 1.0 V
pp
f = 217 Hz
f = 1.0 kHz
62
56
57
dB
PSRR
Power Supply Rejection Ratio
V
p_ripple_pk
pk
= 200 mV, R
L
= 8.0 ,
Inputs AC Grounded
V
p
= 3.6 V
f = 217 kHz
f = 1.0 kHz
62
65
dB
Figure 2. Test Setup for Graphs
OUTM
OUTP
GND
R
i
INP
INM
VP
R
i
C
i
C
i
+
+
4.7 F
+
Audio Input
Signal
Load
30 kHz
Low Pass
Filter
Measurement
Input
Power
Supply
NCP9004
NOTES:
1. Unless otherwise noted, C
i
= 100 nF and R
i
= 150 k . Thus, the gain setting is 2 V/V and the cutoff frequency of the
input high pass filter is set to 10 Hz. Input capacitors are shorted for CMRR measurements.
2. To closely reproduce a real application case, all measurements are performed using the following loads:
R
L
= 8 means Load = 15 H + 8
+ 15 H
R
L
= 4 means Load = 15 H + 4 + 15 H
Very low DCR 15 H inductors (50 m ) have been used for the following graphs. Thus, the electrical load
measurements are performed on the resistor (8 or 4 ) in differential mode.
3. For Efficiency measurements, the optional 30 kHz filter is used. An RC low
pass filter is selected with
(100
, 47 nF) on each PWM output.
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