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參數(shù)資料
| 型號： | LA4525 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Dual AF Power Amplifier for Radio Cassette Recorders |
| 中文描述： | 雙自動對焦功率放大器收錄音機(jī) |
| 文件頁數(shù)： | 8/8頁 |
| 文件大?。?/td> | 203K |
| 代理商： | LA4525 |
External Components
.
The starting time, t
s
, can be varied by changing the value of
the input capacitor. A value of 2.2 μF is recommended. A
smaller value will result in a lower starting time, and a larger
value, a higher starting time.
.
The output capacitor should have a value of 470 μF. A lower
value will cause the low-frequency roll-off and low-power
characteristics to deteriorate.
.
A value of 470 μF is recommended for the power supply
capacitor, although this can change according to the design
setup conditions.
.
In dual mode, BTL IN (the channel 2 negative feedback
connection) should be left floating.
BTL mode
.
The output capacitors should have a value of 470 μF. If these
are omitted, a ‘‘popping’’ noise occurs. Also, any output
offset will cause a current to flow which could damage the
load under quiescent DC conditions.
.
bipolar capacitor. A larger value can cause switching noise
when power is applied to the device.
.
The voltage gain is fixed internally to 40 dB in dual mode
and 46 dB in BTL mode. These values cannot be altered by
connecting external components.
.
Phase correction capacitance (600 pF/TOTAL) is
incorporated in the internal stages. Oscillation damping
components (R and C) are also incorporated in the output pin
circuits.
.
Power consumption
Note that the 8-pin DIP does not have a heat dissipating
surface and that the power dissipation ratings are critical.
The maximum power dissipation of the device is 1.25 W,
and 1.5 W when the device is mounted on the recommended
PCB. The actual power dissipated depends on the supply
voltage and the load conditions. Ensure that the device is
kept within its maximum rating. For AC supplies,
transformer tappings may need to be adjusted to keep the
device within maximum ratings.
V
CC
π
2
R
L
Note
For BTL mode operation, the value of R
L
used in the
calculation should be 1/2 the actual value.
.
If the speaker plug jacks short to ground when connected, a
protection resistor should be inserted in the output line.
.
If the device is operated at or near its rated values, these
values can be exceeded by small changes in operating
conditions, leading to device breakdown. Accordingly, ensure
that a safety margin is maintained so as not to exceed the
maximum ratings.
.
Check the PCB surface after soldering to ensure that no pins
have been accidentally shorted. Any short between pins could
cause poor operating characteristics or permanently damage
the device when power is applied.
.
If making the PCB, check the printed wiring to ensure that
no feedback loops occur between input and output.
Pd max =
2
+ I
CCO
×
V
CC
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:
1
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:
2
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 March, 1996. Specifications and information herein are subject to change without notice.
R
L
LA4525
No.4022-8/8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4525_08 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Radio Cassette Recorders Dual AF Power Amplifier |
| LA4525-E | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LA4525-V-E | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LA4530M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA4530S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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