LA4425A Просмотр технического описания (PDF) - ON Semiconductor

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LA4425A

5W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo

ON Semiconductor 

LA4425A

Instructions and Precautions

• Connect a capacitor of 1000pF across pins  and  for external disturbance path.

• Be careful of the ground line artwork when laying out the printed circuit pattern. Arrange so that the Sg route and load

current flow-in route do not overlap. Refer to the recommended printed circuit pattern or make slits, etc. at pins 

and .

DUAL Printed Circuit Pattern Example

OUT1

VCC

OUT2

GND

1

1

IN1

GND

IN2

• Short Circuit Tests

Cu-foiled side 45.0×75.0mm2

SW1

SW3

+

LA4425A

+

+

13.2V

SW2

SW4

Our company's recommended printed circuit board: Apply VCC=13.2V using a 30×30×1.5mm3 thick aluminum board.

The IC will be protected from the DC/AC shorting of switches 1 to 4 above. However, be careful not to damage the IC

by turning VCC ”ON” when DC short (SW 1 or SW 2) is on.

• Power Supply Positive Surge

JASO tester

Application of giant pulse

2.2μF

+

Rg

620Ω

LA4425A

0.15μF

+

1000μF

RL

13.2V

The over-voltage protector (VCCX ≈ 21.5V) inside the IC is used to cut all bias routes and reverse bias between B-E of

output stage elements, in order to increase the power line’s capability of handling positive surge. This means, of course,

that a VCES (VCBO) type output stage element is used instead of the VCEO (VCER) type.

No.A0195-7/9

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