LA4601 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA4601

Audio Power Amplifier for Radio Cassette Recorders

SANYO -> Panasonic 

LA4601

Pin Descriptions

1. Standby switching function

Power is switched ON and OFF by controlling the High and Low states at pin 7,

respectively (standby). To switch power ON, apply 1.5V or more, or 800 µA to

pin 7.

Current supplied to pin

7 =..

Applied voltage

+

Applied voltage – VBE (approx. 0.7V)

2 kΩ

2 kΩ

7

• When directly connecting the microcontroller, add a resistor in series

to optimize the current for the microcontroller.

VCC

To bias circuit

2kΩ

2kΩ

2. Input pins (8,10)

Voltage at the input pins is approx. 2 VBE (1.4V).

Input impedance is approx. 30 kΩ.

• The recommended value for the input capacitor is 0.22 µF, but this can be varied in order to adjust the starting time

(ts). (The starting time is the time required from applying voltage to the standby pin until sound output is obtained.)

Input capacitator

Starting time (ts)

1.0 µF

0.2s

2.2 µF

0.3s

3.3 µF

0.5s

4.7 µF

0.65s

10 µF

1.5s

3. Filter (decoupling) pin (5)

Pin voltage is approx. 1/2 VCC.

The recommended value for the filter capacitor is 100 µF.

When capacitance is lower, pop noise when setting the standby pin to Low (power OFF) will increase.

Filter capacitor= 100 µF

AC voltage (100 mV)

Output DC voltage

Filter capacitor= 47 µF

AC voltage (200mV)

Output DC voltage

No. 6013-4/7

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