BA7786FP-YE2 Rohm Semiconductor, BA7786FP-YE2 Datasheet - Page 9

• Manufacturer Part Number: BA7786FP-YE2
• Description: IC AMP AUDIO STER AB 25HSOP
• Manufacturer: Rohm Semiconductor
• Type: Class ABr

Specifications of BA7786FP-YE2

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Voltage - Supply: 4.5 V ~ 5.5 V
• Features: Depop, Mute
• Mounting Type: Surface Mount
• Package / Case: 25-HSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -

•
(1) Gain between LINE IN L / LINE IN R and HP OUT L /
HP OUT R
G
V
Set so that 12k
ing to the pin 1 DC voltage (V
input can be accommodated by attaching multiple resis-
tors.
(2) Output level between SYSTEM BEEP IN and HP
OUT L / HP OUT R
Inputting a pulse wave to SYSTEM BEEP IN causes HP
OUT L and HP OUT R to output a pulse wave. The out-
put level of this pulse wave depends on the resistance
between pin 7 and GND. The level when EVR is at its
maximum (V
Set so that R
tween LINE IN L / LINE IN R and HP OUT L / HP OUT
R, this level attenuates according to the pin 1 DC volt-
age.
(3) Gain between SP IN L / SP IN R and SP OUT L / SP
OUT R (BA7786FP-Y)
This is calculated as follows.
Multimedia ICs
CC
HP
Circuit operation
), is calculated as follows:
, the gain when EVR is at its maximum (V
G
V
G
(BA7786FP-Y only, BA7787FS: pin 15)
HB
HP
SP
E
= HP V
0.5
20 LOG
20 LOG
100k (V
R
R
R
V
13k + R
CC
CC
56k. This gain attenuates accord-
) is calculated as follows.
– 0.7
HB
1k + R
1k + R
R
60k
32k
1.1V). As with the path be-
60k (V
E
7
2
4
(dB)
(dB)
) (see Fig. 8). Mixing
P-P
)
E
= HP
Gain between SP IN and SP OUT 1 / SP OUT 2
(BA7787FS)
This is calculated as follows.
(4) Gain between PM BEEP IN and SP OUT 1 / SP OUT 2
This is calculated as follows.
This path is output regardless of whether LIN MIX ON /
OFF is at the high or low level.
(5) Gain between LINE IN L and LCH OUT
This gain (G
This path is not controlled by EVR or the mute function.
G
G
G
(BA7786FP-Y only, BA7787FS: pin 8)
SP
SB
HL
HL
) is calculated as follows.
20 LOG
20 LOG
20 LOG
R2
BA7786FP-Y / BA7787FS
R
R
R
R
R8
1k + R
1k + R
2 R2
32k
20k
R8
20
21
9
2
8
7
(dB)
(dB)
(dB)
(BA7786FP-Y)
9