la4260 Sanyo Semiconductor Corporation, la4260 Datasheet - Page 3

• Manufacturer Part Number: la4260
• Description: 2.5 W 2-channel Af Power Amplifier For Home Stereos And Music Centers
• Manufacturer: Sanyo Semiconductor Corporation

Sample Application Circuit 1:
Recommended Circuit
Sample Printed Circuit Pattern
Description of External Parts
C1, C4
C2, C3
C5, C7
C6, C8
R1, R2
R3, R4
C10
C9
polyester film
capacitor
100 k
100 µF
330 pF
470 µF
470 µF
100 µF
0.1 µF
3.3
Feedback capacitor
Decreasing the capacitance value lowers the low frequency response. Increasing the
capacitance value makes the starting time later.
Input short capacitor
Reduces the high frequency noise when the input impedance is increased. Not required
when the input impedance is decreased.
Output capacitor
Decreasing the capacitance value causes insufficient power at low frequencies.
Oscillation blocking capacitor
Decreasing the capacitance value causes oscillation to occur easily. Use a polyester film
capacitor that is good in high frequency response and temperature characteristic. The use
of an electrolytic capacitor may cause oscillation to occur at low temperatures.
Power capacitor
Decreasing the capacitance value causes ripple to occur. Locating at a distance from the
IC or removing this capacitor may cause oscillation to occur.
Ripple filter capacitor
Decreasing the capacitance value excessively or removing this capacitor causes ripple to
occur. However, increasing the capacitance value does not always cause ripple to be
reduced. Decreasing the capacitance value makes the starting time earlier.
Input bias resistor
Determines the bias (bias of GND potential) to be applied to the input pin and the input
impedance. Not required if variable resistors are used.
Resistor connected in series with oscillation blocking capacitor.
Prevents phase shift attributable to the oscillation blocking capacitor so that oscillation is
hard to occur.
LA4260
Unit (resistance:
Sample Application Circuit 2:
Circuit with minimum number of external
parts
Unit (resistance:
, capacitance: F)
, capacitance: F)
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