參數(shù)資料
型號(hào)： LA4485
廠商： Sanyo Electric Co.,Ltd.
英文描述： 5 W, Two-channel Power Amplifier with Very Few External Parts
中文描述： 5瓦，雙通道與極少的外部零件功率放大器
文件頁(yè)數(shù)： 17/20頁(yè)
文件大?。?/td> 497K
代理商： LA4485
BTL-mode Operation Notes
Use the input capacitor C
IN
in the range 0.22 μF to 2.2 μF.
.
Use the standby supply capacitor in the range 0.22 μF to 1.0 μF.
When the capacitor is 2.2 μF or more, the V
N
trace for standby-off changes, and the switching noise increases significantly.
.
The recommended DC (filter) capacitor is 100 μF or greater.
.
The BTL-mode coupling capacitor should be 2.2 μF.
When this capacitor is decreased, the output power is decreased. However, when this capacitor is increased, speaker
turn-ON transient noise is increased significantly.
.
In BTL mode, the ripple rejection ratio (SVRR) is approximately 40 dB.
This is because the output ripple portion of the noninverted side penetrates the BTL coupling end, so that ripple on the
inverted side is large. The following method is described as one external measure:
In BTL mode, channel 1 should be non-inverted and channel 2 should be inverted.
This measure yields an SVRR of approximately 50 dB. Note that the Rx loss voltage is approximately 1 V, and the P
O
loss is
about 1.0 to 1.5 W (to the 15 W level).
.
Example of minimum parts for BTL operation
SS VCC
LS VCC
Inverting
Non-
No standby function
SVRR
6
40 dB
C
IN
= 2.2 μF
C
BTL
= 2.2 μF
(Three point method)
1
Load short-circuit (to ground)
2
Output-to-supply short-circuit
3
Output-to-ground short-ciruit
Dual-mode short-circuit
test circuit
LA4485
No.3680-17/20
相關(guān)PDF資料
PDF描述
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參數(shù)描述
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LA4498 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Car Stereo-Use BTL-OCL 20W AF Power Amp
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