BA7786FP-Y Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BA7786FP-Y

Headphone / speaker amplifier for notebook computers

ROHM Semiconductor 

Multimedia ICs

BA7786FP-Y / BA7787FS

BA7787FS

No.

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

R12

R13

R14

R15

C1

C2

C3

C4

C5

C6

C7

C8

C9

C10

C11

C12

VR1

Use

Used to set the gain from LINE IN L / LINE IN R (pins 2 and 4) to HP OUT

L / HP OUT R (pins 19 and 18) (See section 1, on circuit operation for the formula.)

A wide range of mixing ratios can be set by changing the values of R1, R2 and

R3 (or R4, R5 and R6).

Resistors for mixing SYSTEM BEEP IN (pin 6). Because the threshold voltage

between the high and low levels is fixed inside the IC, these resistors should be set

to 33kΩ.

• Used to set the gain from SP IN (pin 7) to SP OUT 1 / SP OUT 2

(pins 14 and 13). (See section 3, on circuit operation for the formula.)

• Used to set the gain from PM BEEP IN (pin 8) to SP OUT 1 / SP OUT 2

(pins 14 and 13). (See section 4, on circuit operation for the formula.)

• Used to set the output level from SYSTEM BEEP IN (pin 6) to HP OUT

L / HP OUT R (pins 19 and 18). (See section 2, on circuit operation for the formula.)

• The load resistor for HP OUT R.

• The load resistor for HP OUT L.

• The coupling capacitor for LINE IN L

• The coupling capacitor for LINE IN R

• The ripple rejection capacitor for the bias pin

• The coupling capacitor for SYSTEM BEEP IN

• The coupling capacitor for SP IN

• The coupling capacitor for PM BEEP IN

• The bypass capacitor for SP VCC (used for low-frequency ripple rejection)

• The bypass capacitor for SP VCC (used for high-frequency ripple rejection)

• The coupling capacitor for HP OUT R

• The coupling capacitor for HP OUT L

• The bypass capacitor for HP VCC (used for low-frequency ripple rejection)

• The bypass capacitor for HP VCC (used for high-frequency ripple rejection)

• Used to change the pin 1 DC voltage

Standard value

27kΩ

27kΩ

27kΩ

27kΩ

27kΩ

27kΩ

33kΩ

33kΩ

33kΩ

15kΩ

15kΩ

18kΩ

390kΩ

100Ω

100Ω

0.1µF

0.1µF

47µF

0.1µF

0.1µF

0.1µF

100µF

0.1µF

47µF

47µF

100µF

0.1µF

20kΩ

18

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