Sanyo EP93F User Manual

 

 

  

 

 

5

9

10

11

12

13

1

6

7

8

3

4

2

REF
amplifier

MUTE

MUTE

Rf1

Rf2

RNF2

RNF1

BTL IN

BTL OUT

LA4425A

2

1

5

4

+

+

+

VCC

1000

µ

F

Co 1000

µ

F

Ci 2.2

µ

F

13.2V

3

speaker

4

Ω

The LA4485 obviates the need for the BS capacitor, noise filter capacitor, and oscillation prevention RC 
components previously required by power amplifier ICs by integrating them on the IC itself. The LA4485 requires 
only the barest minimum of external components and both dual and BTL type operation are supported in the 
power series ("stylish power").

■ 

Dual: 5 W    2, BTL: 15 W

■ 

Extremely few external components required: 4 or 5 in dual mode, 3 or 4 in BTL mode

■ 

Built-in Each protection circuits

 ◆ 

Overvoltage protection circuit

 ◆ 

Thermal protection circuit

 ◆ 

Output DC short protection circuit (with respect to both VCC and ground)

■ 

Circuit to handle application of +VCC to the outputs

■ 

Built-in impulse protection circuit

■ 

Standby mode switching function

■ 

Audio muting function

■ 

Package: SIP13H

Large signal
system VCC

Filter

Filter

Small signal 
system VCC

Channel 1 input

Channel 2 input

Channel 2 output

Channel 1 output

Input

amplifier

(CH1)

Input

amplifier

(CH2)

Pre-driver

amplifier

Pre-driver

amplifier

Short to ground 
protection circuit

Short to ground 
protection circuit

Standby mode

Standby mode 
switch

Thermal protection 
circuit

Short to VCC 

protection circuit

Short to VCC 

protection circuit

Output
amplifier

Output
amplifier

Large signal system ground

Small signal system ground

Overvoltage 
protection circuit

The LA4425A is a 5 W power amplifier IC for car radio and car stereo systems that requires an extremely small 
number of external components.

■ 

The industry's first power amplifier that requires so few external components

 ◆ 

Provided in the industry's smallest package: SIP-5H (a TP126 type package)

 ◆ 

Only required 2 external components: input and output coupling capacitors only

■ 

As a power IC, evaluation, adjustment, and investigation are essentially unnecessary 

    This leads to simplified management

■ 

Wide operating supply voltage range: 5 to 16 V

■ 

Built-in Each protection circuits

 ◆ 

Overvoltage protection circuit

 ◆ 

Thermal protection circuit

 ◆ 

Output DC short protection circuit

■ 

Built-in impulse protection circuit

■ 

Package: SIP5H