SANYO LA47202P Data Sheet

Ordering number : ENA0508

Monolithic Linear IC

LA47202P

Four-Channel BTL Power
Amplifier for Car Audio Systems

Overview

The LA47202P is a 4-channel BTL power amplifier IC developed for use in car audio applications. The LA47202P adopts
a pure complementary output stage circuit structure with a v-pnp transistor for the high side and an npn transistor for the
low side to provide both high output power and high quality sound.
The LA47202P integrates all the functions required for car audio applications on the same chip, including a standby switch,
a muting function, and a full complement of protection circuits. It also features a self diagnostics function.

Functions

• High output : PO max = 47W (typ.) (VCC = 14.4V, f = 1kHz, JEITA max, RL = 4Ω)
: PO max = 29W (typ.) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4Ω)
: PO max = 22W (typ.) (VCC = 14.4V, f = 1kHz, THD = 1%, RL = 4Ω)

• Muting function incorporated (pin 22)

• Built-in standby switch (pin 4)

• Self diagnostics function incorporated (pin 25) :

Output of both output offset det ect i on, shorting to VCC or ground and load shorting signals

• Electric mirror noise decrease

• Full compliment of protection circuits (shorting to VCC, shorting to ground, load shorting, overvoltage, and thermal

protection).

• Improved oscillation stability

Note 1 : Take care to avoid w ron g con necti on . Othe rwi se, IC or e qui pm ent ma y suffer bre akd own , dam age, or det eri ora t ion.
Note 2 : The protective circuit fu nctio n is t o avoi d the a b norm al state (wr ong con nection of t he out put ) tem pora ril y and does

not guarantee that IC is not broken.
These protective functions do not operate outside the ope r a ti on guarantee range, and wrong connection of output
may cause breakdown of IC.

Note 3 : External parts, such as the anti-oscillation part, diode to prevent breakdown, may become necessary depending on t he

set condition. Check their necessity for each set.

Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.

SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values ( such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.

D2706 MS PC 20060809-S00002 No.A0508-1/8

LA47202P

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

V

max1 Without signal, t = 1 minute 26 V Maximum supply voltage

CC

V

max2 When operating 18 V

CC

Maximum output current IO peak Per channel 4.5 A
Allowable power dissipation Pd max W ith an iInfinitely large heat sink 50 W
Operating temperature Topr -40 to +85 °C
Storage temperature Tstg -40 to +150 °C
Thermal resistance between

junction cases

Note) The relationship between the power dissipation (Pd) and the junction-to-case thermal resistance (θj-c), heat sink

thermal resistance (θf) and junction temperature (Tj), case temperature (Tc), and ambient temperature (Ta) is as

expressed by the following equation :
Tj = Pd (θj-c+θf) +Ta
= Pd×θj-c+Tc, *Tc = Pd×θf+Ta
Note that Tj max must be limited with Tstg max (150°C).

Recommended Operating Ranges

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 14.4 V
Recommended load resistance RL 4 Ω
Operating supply voltage range VCC op Range not exceceeding Pd max 9 to 16 V

Electrical Characteristics at Ta = 25°C, VCC = 14.4V, RL = 4Ω, f = 1kHz, Rg = 600Ω

Parameter Symbol Conditions

Quiescent current I
Standby current Ist Vst = 0V 10 µA
Voltage gain VG VO = 0dBm 25 26 27 dB
Voltage gain difference ∆VG -1 +1 dB
Output power

Output offset voltage Vnoffset Rg = 0 -150 +150 mV
Total harmonic distortion THD PO = 4W 0.05 0.3 %
Channel separation CHsep VO = 0dBm, Rg = 10kΩ 55 65 dB
Ripple rejection ratio SVRR Rg = 0, fr = 100Hz, VCCR = 0dBm 45 60 dB
Output noise voltage VNO Rg = 0, BPF = 20Hz to 20kHz 100 200 µVrms
Input resistance Ri 50 kΩ
Mute attenuation Matt VO = 20dBm, mute : on 65 80 dB

* 0dBm = 0.775Vrms

θj-c 1 °C/W

at Ta = 25°C

Ratings

min typ max

RL = ∞, Rg = 0 200 400 mA

CCO

PO THD = 10% 24 29 W
PO max1 VCC = 13.7V, JEITA max 42 W
PO max2 JEITA max 47 W

Unit

No.A0508-2/8

LA47202P

Block Diagram

6 20

VCC3/4VCC1/2

0.1µF

+

2200µF

4700pF

IN 1

+

0.47µF

CONTROL

IN 2

+

0.47µF

DC
+

22µF

11 9

1

12

10

Ripple

filter

+

-

Protective

+

-

+

-

circuit

+

-

OUT 1+

OUT 1-

7

PWR GND1

8

OUT 2+

5

OUT 2-

3

PWR GND2

2

AC GND

0.47µF

PRE GND

+

IN 3

+

0.47µF

IN 4

+

0.47µF

16

Mute

circuit

15 17

14

+

-

Protective

++

-

+

-

circuit

-

25

2213

19

18

21

23

4.7kΩ
5V

10kΩ

Mute

+

1µF

OUT 3+

OUT 3-

PWR GND3

OUT 4+

OUT 4-

STBY

+5V

ST ON

4

Standby

switch

PWR GND4

24

The components and constant values in the test circuit are used for confirmation of characteristics and do not guarantee
that the application equipment will be free from malfunction or trouble.

R

L

R

L

OFFSET
DIAG

Low Level

Mute ON

R

L

R

L

V

CC

No.A0508-3/8