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Sanyo Electric Components Datasheet

LA4743B Datasheet

45 W Four-Channel (Bridge Circuit) Power Amplifier

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Ordering number : ENN6630
Monolithic Linear IC
LA4743B
45 W Four-Channel (Bridge Circuit) Power Amplifier
Overview
The LA4743B is a 45 W 4-channel power amplifier IC for
car stereo systems. It features a built-in bridge circuit and
the ability to radically reduce the number of external
components required. It is also pin compatible with the
LA4743A, which differs in the amount of gain provided.
Features
• Maximum output power: 45 W × 4 channels
(VCC = 14.4 V, 4 load, 1 kHz)
• 40 W × 4 channels (VCC = 13.7 V, 4 load, 1 kHz)
• Requires only seven external components and does not
require an oscillation prevention RC circuit, a noise
filter, or a BS capacitor.
Functions
• Muting function
• Built-in standby switch
• Full complement of built-in protection circuits,
including protection from shorting to VCC, shorting to
ground, load shorting, overvoltages, and overheating.
Package Dimensions
unit: mm
3236-HZIP25
[LA4743B]
29.2
25.6
R1.7
4.5
2.60 (1.0)
2.0 2.0
0.53
0.4
4.0 4.0
SANYO: HZIP25
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Package thermal resistance
Symbol
VCC max1
VCC max2
IOpeak
Pd max
Topr
Tstg
θjc
Conditions
Signal present
No signal (for 1 minute)
With an arbitrarily large heat sink
Ratings
18
26
4.5/ch
50
–40 to +85
–40 to +150
1
Unit
V
V
A
W
°C
°C
°C/W
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3100RM (OT) No. 6630-1/9


Sanyo Electric Components Datasheet

LA4743B Datasheet

45 W Four-Channel (Bridge Circuit) Power Amplifier

No Preview Available !

Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Recommended load resistance
Operating supply voltage range
Symbol
VCC
RL
VCC op
LA4743B
Conditions
Ratings
14.4
4
9 to 18
Unit
V
V
Operating Characteristics at Ta = 25°C, VCC = 14.4 V, f = 1 kHz, RL = 4 , Rg = 600
Parameter
Quiescent current
Standby current
Output offset voltage
Voltage gain
Voltage gain difference
Output power
Total harmonic distortion
Channel separation
Ripple rejection ratio
Output noise voltage
Muting attenuation
Symbol
Conditions
ICCO RL = , Rg = 0
Ist Vst = 0 V
VNoffset
VG
VG
Rg = 0
VO = 0 dBm
PO1 THD = 10 %
PO max1 VCC = 13.7 V, VIN = 5 Vrms
PO max2
THD
CHsep
SVRR
VNO
Mute(att)
VIN = 5 Vrms
PO = 4 W
VO = 0 dBm, Rg = 10 k
fr = 100 Hz, VR = 0 dBm, Rg = 0
Rg = 0, B.P.F. = 20 Hz to 20 kHz
VO = 20 dBm
min
100
Ratings
typ
200
–150
31
–1
23
50
43
70
32
28
40
45
0.1
60
50
250
80
max
350
10
+150
33
+1
0.4
450
Unit
mA
µA
mV
dB
dB
W
W
W
%
dB
dB
µVrms
dB
No. 6630-2/9


Part Number LA4743B
Description 45 W Four-Channel (Bridge Circuit) Power Amplifier
Maker Sanyo
Total Page 9 Pages
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