LA4728 [SANYO]
2-Channel BTL Power Amplifier 35 W+35 W with Standby Switch for Car Stereos; 2通道BTL功率放大器35 W + 35 W和待机开关，用于汽车音响
| 型号： | LA4728 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | 2-Channel BTL Power Amplifier 35 W+35 W with Standby Switch for Car Stereos |
| 文件： | 总3页 (文件大小：48K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : EN 5716
*
Monolithic Linear IC
LA4728
2-Channel BTL Power Amplifier (35 W+35 W)
with Standby Switch for Car Stereos
Preliminary
Overview
Package Dimensions
The LA4728 is a BTL two-channel power IC for car
audios developed in pursuit of excellent sound quality.
unit: mm
3113A-SIP14HZ
Low-region frequency characteristics have been improved
through the use of a new NF capacitorless circuit, and
crosstalk which causes “muddy” sound has been reduced
by improving both circuit and pattern layout. As a result
the LA4728 provides powerful bass and clear treble.
[LA4728]
Features
High power: supports total output of 35 W+35 W. [EIAJ
power] (V =14.4 V, THD=30 %, R =4 Ω)
CC
L
Less pop noise.
Designed for excellent sound quality.
(f <10 Hz, f =130 kHz)
L
H
Any rise time settable by an external capacitor.
Standby switch circuit on chip. (microcontroller support-
ed)
SANYO: SIP14HZ
Various protectors on chip.
(output-to-ground short/ output-to-V short/ load
CC
short/ overvoltage/ thermal shutdown circuit)
The LA4728 is pin-compatible with the LA4725.
Specifications
Maximum Ratings at Ta = 25 ˚C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
V
V
max
18
50
CC
Surge supply voltage
V
surge f ≤ 0.2 s, single giant pulse
V
CC
Maximum output current
Allowable power disspation
Operating temperature
Storage temperature
I
peak Per channel
3.5
A
O
Pd max
Topr
With arbitrarily large heat sink
32
W
˚C
˚C
–35 to +85
–40 to +150
Tstg
Recommended Conditions at Ta = 25 ˚C
Parameter
Recommended supply voltage
Operating voltage range
Symbol
Conditions
Ratings
13.2
Unit
V
V
CC
V
op
Range where Pd max is not exceeded
9 to 16
4
V
CC
Recommended load resistance
R
op
Ω
L
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
32497RM(KOTO) No.5716-1/3
LA4728
Operating Characteristics Ta = 25 ˚C, V
= 13.2 V, R = 4 kΩ, f = 1 kHz, Rg = 600 Ω
L
CC
Ratings
Parameter
Quiescent current
Symbol
Conditions
Unit
min
70
typ
125
10
max
250
60
I
Rg=0
mA
µA
dB
CCO
Standby current
I
ST
Voltage gain
VG
38
16
40
42
Total harmonic distortion
THD
P =1 W
0.06
20
0.2
%
O
P
R =4 Ω, THD=10 %, V =13.2 V
W
O1
L
CC
Output power
P
R =4 Ω, THD=10 %, V =14.4 V
25
W
O2
L
CC
P
R =4 Ω, THD=30 %, V =14.4 V
35
W
O3
L
CC
Output offset voltage
Output noise voltage
Ripple rejection ratio
Channel separation
Input resistance
V
Rg=0
–300
+300
0.5
mV
mVrms
dB
N offset
V
Rg=0, B.P.F.=20 Hz to 20 kHz
Rg=0, f =100 Hz, V =0 dBm
0.1
50
60
30
NO
SVRR
Chsep
Ri
40
50
R
R
Rg=10 kΩ, V =0 dBm
dB
O
21
39
kΩ
V
Standby pin applied voltage
Vst
Amp on, applied through 10 kΩ
2.5
V
CC
Pd max — Ta
35
Arbitrarily large heat sink
32
30
θjc=2.0˚C/W
θ =3˚C/W
f
25
θ =4˚C/W
f
20.8
20
15 θ =7˚C/W
f
13.9
θ =10˚C/W
f
10.4
10
5
3.1
No fin
0
–20
0
20
40
60
80
100
120 140
160
Ambient temperature, Ta
— ˚C
No.5716-2/3
LA4728
Block Diagram and Sample Application Circuit
100 µF/16V
V
CC
+
C5
2200 µF
2
14
Output pin-to-V
short protector
CC
Ripple
filter
OUT1
–
13
12
11
Predriver
Predriver
Power
Power
R
4Ω
L
C6 0.1 µF
C1
**
**
R2
+
–
1
Load short
protector
2.2Ω
IN
R3
2.2 µF/6V
2.2Ω
C7 0.1 µF
+
OUT1
Output pin-to-GND
short protector
BIAS
circuit
Overvoltage/
surge protector
3
V
CC
**
(Polyester film
capacitor)
R1
10kΩ
OFF ON
+
Standby
SW
Thermal
shutdown
Output pin-to-GND
short protector
4
5V
OUT2
–
9
10
8
Predriver
Predriver
Power
Power
R
4Ω
L
C4
IN2
C8 0.1 µF
**
**
R4
+
6
Power
GND2
Load short
protector
2.2Ω
IN
–
R5
2.2 µF/6V
2.2Ω
C9 0.1 µF
+
OUT2
Output pin-to-V
short protector
CC
Pop noise
prevention
circuit
5
+
7
+
33 µF/6V
C3
0.47 µF/6V
C10
A07431
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and
the like, the failure of which may directly or indirectly cause injury, death or property lose.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates,
subsidiaries and distributors and all their officers and employees, jointly and severally, against any
and all claims and litigation and all damages, cost and expenses associated with such use:
Not impose any responsibilty for any fault or negligence which may be cited in any such claim or
litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of
their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant-
eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees
are made or implied regarding its use or any infringements of intellectual property rights or other rights of
third parties.
This catalog provides information as of March, 1997. Specifications and information herein are subject to
change without notice.
No.5716-3/3
相关型号：
©2020 ICPDF网 联系我们和版权申明