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PDF LA4440 Data sheet ( Hoja de datos )
| Número de pieza | LA4440 | |
| Descripción | 2-Channel, Power Amplifier | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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 1. Bridge 19W typ Power Amplifier  Hay una vista previa y un enlace de descarga de LA4440 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Ordering number : EN750F
LA4440
Monolithic Linear IC
6W 2-Channel, Bridge 19W(typ)
Power Amplifier
http://onsemi.com
Features
Built-in 2 channels (dual) enabling use in stereo and bridge
amplifier applications.
Dual : 6W2 (typ)
Bridge : 19W (typ)
Minimum number of external parts required.
Small pop noise at the time of power supply ON/OFF and
good starting balance.
Good ripple rejection : 46dB (typ)
Good channel separation.
Small residual noise (Rg=0).
Low distortion over a wide range from low frequencies to
high frequencies.
Easy to design radiator fin.
Built-in audio muting function.
Built-in protectors.
a. Thermal protector
b. Overvoltage, surge voltage protector
c. Pin-to-pin short protector
Package Dimensions
unit : mm
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter
Maximum supply voltage
Surge supply voltage
Allowable power dissipation
Thermal resistance
Operating temperature
Storage temperature
Symbol
VCC max1
VCC max2
VCC (surge)
Pd max
j-c
Topr
Tstg
Conditions
Quiescent (t=30s)
Operating
t ≤ 0.2s
Tc=75°C, See Pd max – Ta characteristic
Junction-to-case
Ratings
25
18
50
15
3
–20 to +75
–40 to +150
unit
V
V
V
W
°C/W
C
C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
Recommended Operating Conditions at Ta = 25C
Parameter
Supply voltage
Load resistance
Symbol
VCC
RL
Stereo
Bridge
Conditions
Ratings
13.2
2 to8
4 to 8
unit
V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended
Operating Ranges limits may affect device reliability.
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013
21500TH(KT)/90196RM/33194HO/8064KI/3233KI/O070KI,TS No.750-1/13
1 page  
Voltage Gain Adjust at Stereo Mode
LA4440
RNF=50Ω (typ), Rf=20kΩ (typ)
At RNF’=0 (recommended VG)
VG=20log
VG
RNF
(dB)
In case of using RNF’
Rf
VG=20log RNF+RNF’ (dB)
Voltage Gain Adjust at Bridge Amplifier Mode (No. 1)
Voltage Gain Adjust at Bridge Amplifier Mode (No. 2)
· The bridge amplifier configuration is as shown left, in
which ch1 and ch2 operate as noninverting amplifier
and inverting amplifier respectively.
The output of the noninverting amplifier divided by
resistors R3, R4 is applied, as input, to the inverting
amplifier.
Since attenuation (R4/R3) of the non-inverting amplifier
output and amplification factor (Rf/R4+RNF) of the
inverting amplifier are fixed to be the same, signals of
the same level and 180° out of phase with each other
can be obtained at output pins (12) and (10). The total
voltage gain is apparently higher than that of the
noninverting amplifier by 6dB and is approximately
calculated by the following formula.
VG=20log
Rf
RNF
+ 6dB
In case of reducing the voltage gain, RNF’ is connected
to the noninverting amplifier side only and the following
formula is used.
VG=20log
Rf
RNF+RNF’
+ 6dB
VG=20log
Rf
RNF+RNF’
(dB)
2
where (RNF+RNF’) << R5
From this formula, it is seen that connecting RNF’
causes the voltage gain to be reduced at the modes of
both stereo amplifier and bridge amplifier.
No.750–5/13
5 Page 
Characteristics at bridge amplifier mode No. 2
LA4440
No.750–11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LA4440.PDF ] | |
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