BA5415A Rohm Semiconductor, BA5415A Datasheet - Page 5

• Manufacturer Part Number: BA5415A
• Description: IC AMP AUDIO PWR 5.4W STER 12SIP
• Manufacturer: Rohm Semiconductor
• Type: Class ABr

Specifications of BA5415A

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 5.4W x 2 @ 3 Ohm
• Voltage - Supply: 5 V ~ 18 V
• Features: Depop, Mute, Standby, Thermal Protection
• Mounting Type: Through Hole
• Package / Case: 12-SIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Audio ICs
! ! ! ! Operation notes
(1) Input circuit
(2) Gain adjustment
(3) Oscillation countermeasures
The structure of the input circuit is shown in Fig.4. The IC can be used without coupling capacitors, but a maximum of
0.5µA of bias current (I
capacitor C
the IC. Connect an input bias resistor (R
The gain is given by the following formula.
It is possible to reduce the gain by increasing R
more likely to occur. We recommend that you set the gain to 30dB or higher.
We recommend that the capacitor (C1) connected between the B. S pin and the V
a metal-film component with good temperature and high-frequency characteristics. Ceramic capacitors have poor
temperature characteristics, so if used, allow sufficient oscillation margin. It is also possible to connect a capacitor for
oscillation prevention between the output and GND (C2). The oscillation margin depends on the PCB pattern and the
mounting position of the capacitor. Design your PCB after referring to the application example PCB.
G
V
IN
=20log
as shown below. To prevent degradation of the IC characteristics, the input bias resistor is not built into
R
NF
R
BIN
+ R
F
) flows from the input pin, so if potentiometer sliding noise results from this, connect an input
F
C
IN
C
R
33k
NF
IN
+
+
IN
) between the input and GND (the recommended value is about 33kΩ).
5 / 8
IN
RF
5 / 8
F
, but the amount of feedback will increase, and oscillation will be
I
BIN
4 / 9
NF
IN
Fig.4
Fig.5
Fig.6
GND
OUT
V
BS
CC
12
1
3 / 10
2 / 11
Mute circuit
+
−
R
44k
NF
C2
R2
To next stage
+
44k
47µ
C1
OUT
1000µ
GND
NF
12
2 / 11
2 / 11
4 / 9
OUT
+
CC
BA5415A / BA5416
pin for oscillation prevention be