參數(shù)資料
型號(hào)： LM4651N
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： LM4651 & LM4652 Overture⑩ Audio Power Amplifier 170W Class D Audio Power Amplifier Solution
中文描述： 170 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP28
封裝： N28B
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 586K
代理商： LM4651N
LM4652 Pin Descriptions
Pin No.
1
2
3
Symbol
GND
LG
1
V
EE
Description
A ground reference for the thermal shut down circuitry.
LowGate
#
1 is the gate input to a bottom side MOSFET in the H-Bridge.
The negative voltage supply input for the power MOSFET H-Bridge.
The thermal shut down flag pin. This pin transitions to 6V when the die temperature
exceeds 150C.
No connection
LowGate
#
2 is the gate input to a bottom side MOSFET in the H-Bridge.
The switching output pin for one side of the H-Bridge.
No connection.
No connection.
HighGate
#
2 is the gate input to a top side MOSFET in the H-Bridge.
No connection.
No connection.
The positive voltage supply input for the power MOSFET H-Bridge.
HighGate
#
1 is the gate input to a top side MOSFET in the H-Bridge.
The switching output pin for one side of the H-Bridge.
Note:
NC
, no connect pins are floating pins. It is best to connect the pins to GND to minimize any noise from being coupled into
the pins.
4
TSD
5
6
7
8
9
10
11
12
13
14
15
NC
LG
2
VO
2
NC
NC
HG
2
NC
NC
+V
CC
HG
1
VO
2
External Components Description
(Refer to Figure 1)
Components
Functional Description
1.
R
1
Works with R
2
, R
fl1
and R
fl2
to set the gain of the system. Gain = [(R
2
/ R
1
) x ((R
fl1
+
R
fl2
)/ R
fl2
) (R
2
/ R
1
) + .5].
See description above for R
1
.
Sets the gain and bandwidth of the system by creating a low pass filter for the Error
Amplifier’s feedback with C
f
. 3dB pole is at f
C
= 1/(2
π
R
f
C
f
) (Hz).
See description above for R
f
.
Provides a reduction in the feedback with R
fI2
. R
fI1
should be 10 X R
fI2
minimum to
reduce effects on the pole created by R
fI2
and C
fI1
. See also note for R
1
, R
2
for effect on
System Gain.
R
fI2
and C
fI1
creates a low pass filter with a pole at f
C
= 1/(2
π
R
fI2
C
fI1
) (Hz). See also
note for R
1
, R
2
for effect on System Gain.
See description above for R
fI2
.
Establish the second pole for the low pass filter in the feedback path at f
C
=
1/(2
π
R
fI3
C
fI2
) (Hz).
See description above for R
fI3
.
Combined with C
BYP
creates a 2pole, low pass output filter that has a 3dB pole at f
C
= 1/[2
π
(L
1
2C
BYP
)
1
2
] (Hz).
Filters high frequency noise from the amplifier’s output to ground. Recommended value
is 0.1μF to 1μF.
See description for L
1
.
Bypass capacitors for V
CC
, V
EE
, analog and digital voltages (V
DD
, +6V, 6V). See
Supply Bypassing and High Frequency PCB Design
in the
Application Information
section for more information.
Provides the bootstrap capacitance for the boot strap pin.
Sets the dead time or break before make to T
DLY
= (1.7x10
12
) (500 + R
DLY
) (seconds).
Controls the startup time with T
START
= (8.5x10
4
) C
START
(seconds).
Sets the output short circuit current with I
SCKT
= (1x10
5
)/ (10k
\
R
SCKT
) (A).
Controls the switching frequency with f
SW
= 1 X 10
9
/ (4000 + R
OSC
) (Hz).
Schottky diode to protect the output MOSFETs from fly back voltages.
2.
R
2
3.
R
f
4.
C
f
5.
R
fI1
6.
R
fI2
7.
C
fI1
8.
R
fI3
9.
C
fI2
10.
L
1
11.
C
1
12.
C
byp
13.
C
B1
C
B4
14.
15.
16.
17.
18.
19.
B
BT
R
DLY
C
START
R
SCKT
R
OSC
D
1
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4651N 制造商:Texas Instruments 功能描述:IC AUDIO BOOMER CLASS D 170W 4651
LM4651N/NOPB 功能描述:IC AMP AUDIO PWR 170W MONO 28DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Overture™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4652 制造商:NSC 制造商全稱:National Semiconductor 功能描述:170W Class D Audio Power Amplifier Solution
LM4652TA 制造商:Texas Instruments 功能描述:IC QUAD PWRFET CLASS D 170W 4652
LM4652TA 制造商:Texas Instruments 功能描述:IC QUAD PWRFET CLASS D 170W 4652
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