BH3852FS Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BH3852FS

Sound control IC

ROHM Semiconductor 

Audio ICs

FOperation notes

(1) Operating power supply voltage range

As long as the operating power supply voltage range and

ambient temperature are kept within the specified range,

the basic circuits are guaranteed to function, but be sure

to check the constants as well as the element settings,

voltage settings, and temperature settings. Also, volume

curves sometimes depart from target values when there

is a combination of low temperature and reduced power.

(2) Primary amp

BH3852S / BH3852FS

S The input impedance is 47kΩ.

S A buffer if R and C1 are not present.

S The gain can be set by R and the 20kΩ.

GVC = (R + 20kΩ) / R

Note: Set C2 (input coupling) and C1 (used to set the

gain) depending on the frequency band used.

(3) Bass filter

S The BPF is composed of a multifeedback active filter.

fo can be varied according to the value of C.

(theoretical equation)

1

fO = 2π

R2

G = 5kΩ

1

1

2

R1R2C1C2

C1 *1

1) C2

Q

R1

1

2

R2C1C2

(C1)C2)

*1

Note: Filter gain is calculated using the equation on the left. Total output gain is the

sum of the gain for each of the internal circuits.

(When R1 = 11.5kΩ, R2 = 85kΩ, C1 = C2 = C)

5.1 10*6

fO =

C

Q = 1.36 G = 8.5

618

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