LA4425F-E Datasheet, PDF (3/9 Pages) ON Semiconductor – 5W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo

Sample Application Circuit
LA4425A
Ci 2.2μF
+₁
2
5
LA4425A
3
VCC 13.2V
+ _1000μF
Co 1000μF
4⁺
speaker
4Ω
• On-chip overvoltage protection
• On-chip thermal protection
• On-chip pop noise reducing circuit
• On-chip output D.C. short protection
Pin Voltage at VCC = 13.2V
Characteristics
Input
Pin No.
Pin voltage
(reference value)
1
(≈ 2VBE)
1.4V
Small signal
GND
2
0V
Large signal
GND
3
0V
Output
4
(≈ 1/2VCC)
6.5V
VCC
5
(VCC)
13.2V
IC Usage Notes
Maximum ratings
If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum
ratings to be exceeded, thereby leading to a breakdown.
Printed circuit board
When drawing the printed circuit pattern, refer to the sample printed circuit pattern. Be careful not to form a feedback
loop between input and output.
Comparison of External Components
External Parts
Our ICs now in use
Output coupling capacitor

Input coupling capacitor

Bootstrap capacitor

Feedback capacitor

Filter capacitor

Phase compensation capacitor

Oscillation correction polyester

film capacitor
Oscillation correction resistor

Total
8 pcs.
Note: The power supply capacitor is not counted as a power IC part.
LA4425A


-
-
-
-
-
-
2 pcs.
No.A0195-3/9