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參數(shù)資料
| 型號(hào)： | BH3541F |
| 廠商： | Rohm CO.,LTD. |
| 元件分類： | 音頻放大器 |
| 英文描述： | Headphone amplifier for CD-ROMs |
| 中文描述： | 耳機(jī)放大器的CD - ROM |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 122K |
| 代理商： | BH3541F |
BH3541F / BH3544F
Optical disc ICs
!
Application example
Fig.2
5
6
7
8
3
4
V
CC
OUT2
BIAS
IN2
47
μ
1
μ
V
IN
2
180k
180k
0dB
(6dB)
0dB
(6dB)
BIAS
MUTE
TSD
2
1
OUT1
MUTE
IN1
GND
1
μ
V
IN
1
1
μ
100k
330
μ
VMUTE
H : Active
L : Mute
330
μ
V
CC
+
+
+
+
+
+
( ) The values in parenthesis are for the BH3544F.
!
Explanation of external components
(1) Input coupling capacitor (C3 and C5)
Determined by the low-band cut-off frequency. Since the input impedance for this IC is 180k
, it can be determined by
the formula below, but take into consideration the fluctuations, ambient temperature, etc. (a multi-layered ceramic
capacitor is recommended).
C3 (C5) = 1 / ( 2
π
×
180k
×
f )
(2) BIAS capacitor (C6)
47
μ
F when V
CC
= 5V, and 33
μ
F when V
CC
= 3V. If the capacitance is lowered too much, the electrical characteristics
will be adversely affected and popping noise may occur. Therefore, take the sufficient considerations before changing
these values.
(3) MUTE pin for anti-pop measures (R2 and C2)
Possesses an impedance of 190k
with respect to GND, so if R2 is increased too much, the MUTE mode may
become unable to be released.
(4) Output coupling capacitor (C1 and C7)
Determined by the low-band cutoff frequency. As the output load resistance value R
L
(assuming that for output
protection or current limiting, a resistor R
X
will be inserted), it can be determined by the formula below.
C1 (C7) = 1 / ( 2
π
×
( R
L
+
R
X
)
×
f )
(5) Input gain adjustment resistor (R3 and R4) (for BH3544F only)
Input gain adjustment can by performed by external resistors R3 and R4. The desired gain can be set by the formula
given below.
G
VC
= 6
+
20log ( 90k
/ ( 90k
+
R3 ) ) [dB]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BH3544F | Headphone amplifier for CD-ROMs |
| BH3561AF | Post amplifier applicable with 1-bit D / A converter |
| BH3562F | Post amplifier applicable with 1-bit D / A converter |
| BH3563FV | Post amplifier applicable with 1- bit D / A converter |
| BH3864F | Audio sound controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BH3541F_09 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Stereo Headphone Amplifiers |
| BH3541F_10 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Standard Headphone Amplifiers |
| BH3541F-E2 | 功能描述:音頻放大器 STEREO HEADPHONE AMPLIFIER 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 |
| BH3543F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual Audio Amplifier |
| BH3544F | 制造商:ROHM 制造商全稱:Rohm 功能描述:Standard Headphone Amplifiers |
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