LA4450 [SANYO]
Two Channel Power IC for Bus or Track Use in TV and Home Audio Applications; 双通道电源IC公交或轨道使用的电视和家庭音响应用
| 型号： | LA4450 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Two Channel Power IC for Bus or Track Use in TV and Home Audio Applications |
| 文件： | 总7页 (文件大小：472K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : EN4090C
Monolithic Linear IC
LA4450
Two Channel Power IC for Bus or Track
Use in TV and Home Audio Applications
Overview
Package Dimensions
The LA4450 is a single package two channel power IC
that supports an operating voltage of 26 V. It is partic-
ularly well suited for use as the bus or track power IC in
car stereo applications. Additionally, since the LA4450
can drive 4 Ω loads, it can be used effectively in high-
power high-end products. Furthermore, since it supports a
high operating voltage and has low distortion, it is also
optimal for use in TV and home audio products.
unit: mm
3023A-SIP14H
[LA4450]
Functions
• Standby switch (active on high (+5 V) input)
• On-chip impulse noise protection circuit
• On-chip thermal protection circuit
• On-chip overvoltage and surge protection circuits
SANYO: SIP-14H
Features
• Two channels in a single package
• P = 12 W × 2 (V = 26.4 V, R = 8 Ω, THD = 10%)
O
CC
L
• P = 20 W × 2 (V = 26.4 V, R = 4 Ω, THD = 10%)
O
CC
L
• Can drive 4 Ω speakers
• Built-in standby switch
• Minimizes impulse noises
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
max Rg = 0 (no signal)
Conditions
Ratings
Unit
V
V
37
4
CC
I
peak
A
O
Pd max* Infinite heat sink
25
W
Topr
Tstg
–35 to +80
–40 to +150
°C
°C
Note: * Set V
and R within ranges that do not cause Pd max to exceed 25 W.
L
CC
(When V
is 37 V, R should be 6 Ω or larger and when V
is 35 V, R should be 4 Ω or larger.)
CC
L
CC
L
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Recommended load resistance
Operating supply voltage range
Symbol
Conditions
Ratings
26.4
Unit
V
V
CC
R
8
Ω
L
V
op
10 to 30
V
CC
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
43098HA (OT)/10794TS B8-0618/1102 No. 4090-1/7
LA4450
Operating Characteristics at Ta = 25°C, V = 26.4 V, R = 8 Ω, f = 1 kHz, Rg = 600 Ω
CC
L
Ratings
typ
1
Parameter
Standby current
Symbol
Ist
Conditions
Unit
min
max
30
Standby switch off
Rg = 0
µA
mA
W
Quiescent current
I
50
10
80
140
CCO
P
THD = 10%
12
O1
Output power
P
THD = 10%, R = 4 Ω
20
W
O2
L
Voltage gain
VG
V
P
= 0 dBm
= 1 W
49
51
53
0.4
1.0
dB
%
O
O
Total harmonic distortion
Output noise voltage
Ripple exclusion ratio
Channel separation
Standby control voltage
THD
0.07
0.4
55
V
Rg = 0, BPF-BW = 20 Hz to 20 kHz
Rg = 0, f = 100 Hz, V = 0 dBm
mV
dB
dB
V
NO
SVRR
CHsep
Vst
45
45
R
R
V
= 0 dBm, Rg = 10 kΩ
55
O
With a 10 kΩ resistor connected at pin 12
2.5
V
CC
Pd max – Ta
θf – Sf
Heat sink surface area, S – cm2
Ambient temperature, Ta – °C
f
No. 4090-2/7
LA4450
Test Circuit
Unit (resistance : Ω, capacitance : F)
1. Features and Usage Notes
• Pin 12 is the standby pin. The IC operates when a voltage of 2 V or higher is applied through the external resistor
R1. Note that the maximum influx current to pin 12 is 500 µA.
• Changing the voltage gain
The voltage gain VG can be lowered by connecting an external resistor in series between the NF pin (pins 8 and
14) and C
.
NF
30 kΩ
75 + R
VG = 20 log
Nf’
However, since the IC may oscillate if VG is 30 dB or lower, use a VG of 36 dB or higher.
• The LA4450 includes a thermal protection circuit to prevent damage to or destruction of the IC due to abnormal
overheating. As a result, the output may be attenuated or cut off if the application heat sinking is inadequate.
• The LA4450 includes an overvoltage protection circuit to protect the IC against power supply surges and abnormal
voltages. This circuit has hysteresis characteristics: it operates at between 39 and 40 V, and recovers at around 34 V.
• Although the LA4450 includes a current limiter circuit to prevent damage due to abnormal currents, care must still
be exercised to prevent load shorts and other excessive current conditions.
No. 4090-3/7
LA4450
Sample Application Circuit
Unit (resistance : Ω, capacitance : F)
No. 4090-4/7
LA4450
Printed Circuit Board Pattern Example
C opper foiled side
90 × 100 mm2
PO – VCC
PO – VCC
Supply voltage, V – V
CC
Supply voltage, V – V
CC
THD – PO
THD – PO
Output power, P – W
O
Output power, P – W
O
No. 4090-5/7
LA4450
No. 4090-6/7
LA4450
■ 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 loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ 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:
➁ Not impose any responsibility 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 guaranteed 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 April, 1998. Specifications and information herein are subject to change
without notice.
No. 4090-7/7
相关型号：
©2020 ICPDF网 联系我们和版权申明