SANYO LA4425A Datasheet

Ordering number: EN3309C

Monolithic Linear IC

LA4425A

5 W Power Amplifier with Very Few External Parts

for Car Radio and Car Stereo

Features

.

The world’s first power amplifier with very few external
parts.
The smallest package in the industry

→ [SIP-5H (TO-126 type)]

Only two external parts

→ [Only I/O coupling capacitors]

.

Almost no evaluation, adjustment and check of its functions
as a power IC required

→ [Simplified control]

.

Wide operation supply range → 5to16V

.

On-chip protection:

Overvoltage protection
Thermal protection
Output D.C. short protection

.

On-chip pop noise reducing circuit

Package Dimensions

unit : mm

3031A-SIP-5H

[LA4425A]

SANYO : SIP5H

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V
Surge maximum supply voltage V
Maximum output current I

Allowable power dissipation Pd max With infinite heat sink 7.5 W
Operating temperature Topr –30 to +80 °C
Storage temperature Tstg –40 to +150 °C

max Rg = 0 18 V

CC

surge

CC

peak 3.3 A

O

Giant pulse 200 msec
Rise time 1 ms

50 V

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Recommended load resistance R
Operating voltage range V

Operating load resistance range R

CC

L

op 5to16 V

CC

op

L

Under conditions where maximum ratings
are not exceeded

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/8

13.2 V
4 Ω

2to8 Ω

LA4425A

Operating Characteristics at Ta = 25°C, VCC= 13.2 V, RL=4Ω,f=1kHz, Rg = 600 Ω, specified

3

board/specified circuit, 30 × 30 × 1.5 mm

Parameter Symbol Conditions min typ max Unit
Quiescent current I
Voltage gain VG V

Output power
Total harmonic distortion THD V

Output noise voltage V

Ripple rejection ratio

Overvoltage attack V
Starting time t
Input resistance R

Roll-off frequency
Thermal operating temperature Tc 125 °C

CCO

P

1 13.2 V/4 Ω, THD = 10% 4 5 W

O

P

2 14.4 V/4 Ω, THD = 10% 5 6 W

O

NO

SVRR

1

SVRR

2

CCX

s
IN

f

L

f

H

= 0 dBm 43 45 47 dB

O

= 2V 0.1 1.0 %

O

Rg = 0, BPF = 20 Hz to 20 kHz 0.15 0.5 mV
Rg=0,BPF=20Hzto20kHz

V

= 0 dBm, fR= 100 Hz

R

Rg=0,BPF=20Hzto20kHz
V

= 0 dBm, fR= 1 kHz

R

Rg = 0 21.5 V

thick aluminum used

65 130 mA

30 40 dB

47 dB

0.35 s
50 kΩ
40 Hz
90 kHz

Sample Application Circuit

Pd max – Ta

With silicone grease applied.
Heat sink mounting torque 39 N·cm

.

On-chip overvoltage protection

.

On-chip thermal protection

.

On-chip pop noise reducing circuit

.

On-chip output D.C. short protection

With infinite heat sink

With 100 × 100 × 1.5 mm

With 50 × 50 × 1.5 mm
Al heat sink

With 30 × 30 × 1.5 mm

Allowable Power Dissipation, Pd max – W

3

Al heat sink

3

3

Al heat sink

No heat sink

Pin Voltage at VCC= 13.2 V

Characteristics Input

PinNo. 12345

Pin voltage

(reference value)

(6 2V

1.4 V

BE

Ambient temperature, Ta – °C

Small signal

GND

)

0V 0V

Large signal

GND

Output V

(6 1/2 VCC)

6.5 V

CC

(VCC)

13.2 V

No.3309-2/8

LA4425A

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 LA4425A
Output coupling capacitor jj
Input coupling capacitor jj
Bootstrap capacitor j —
Feedback capacitor j —
Filter capacitor j —
Phase compensation capacitor j —
Oscillation correction polyester

film capacitor
Oscillation correction resistor j —

Total 8 pcs. 2 pcs.

j —

Note: The power supply capacitor is not counted as a power IC part.

Sample Printed Circuit Pattern

–mA

CCO

GND

V

CC

OUT Co = 1000 µF

= 1000 µF

CV

CC

–
+

+–

I

CCO–VCC

LA4425A

+

–

Ci = 2.2 µF GND

Cu-foiled side 78.0 × 29.0 mm

VN–V

–V

N

IN

2

CC

Quiescent current, I

Supply voltage, VCC–V

Output pin voltage, V

Supply voltage, VCC–V

No.3309-3/8