參數(shù)資料
型號(hào): TPA4411YZHT
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 0.1 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA16
封裝: 2.18 X 2.18 MM, GREEN, DSBGA-16
文件頁(yè)數(shù): 9/32頁(yè)
文件大小: 1252K
代理商: TPA4411YZHT
www.ti.com
Charge Pump Flying Capacitor and PVSS Capacitor
0.001
0.01
0.1
1
10
100
1 k
10 k
100 k
f Frequency Hz
THD+N
T
otal
Harmonic
Distortion
+
Noise
%
VDD = 3.6 V,
RL = 32 ,
PO = 35 mW,
C = 1
F
C = 2.2
F
0.1
1
10
100
0.0001
0.001
0.01
0.1
1
THD+N
T
otal
Harmonic
Distortion
+
Noise
%
VDD = 3.6 V,
RL = 16 ,
fIN = 20 HZ
C = 1
F
PO Output Power mW
In Phase
180
° Out of Phase
Single Channel
0.001
0.01
0.1
1
10
100
0.001
0.01
0.1
In Phase
180
° Out of Phase
Single Channel
PO Output Power mW
THD+N
T
otal
Harmonic
Distortion
+
Noise
%
VDD = 3.6 V,
RL = 16 ,
fIN = 20 Hz
C = 2.2
F
SLOS430E – AUGUST 2004 – REVISED MARCH 2008
The charge pump flying capacitor serves to transfer charge during the generation of the negative supply voltage.
The PVSS capacitor must be at least equal to the charge pump capacitor in order to allow maximum charge
transfer. Low ESR capacitors are an ideal selection, and a value of 2.2 F is typical. Capacitor values that are
smaller than 2.2 F can be used, but the maximum output power is reduced and the device may not operate to
specifications. Figure 65 through Figure 75 compare the performance of the TPA4411 and TPA4411M with the
recommended 2.2-F capacitors and 1-F capacitors.
TOTAL HARMONIC DISTORTION
+ NOISE
vs
FREQUENCY
Figure 65.
TOTAL HARMONIC DISTORTION
+ NOISE
vs
OUTPUT POWER
Figure 66.
Figure 67.
Copyright 2004–2008, Texas Instruments Incorporated
17
Product Folder Link(s): TPA4411 TPA4411M
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