Any and all SANYO products described or contained herein do not have specifications that can handleapplications that require extremely high levels of reliability, such as life-support systems, aircraft’scontrol systems, or other applications whose failure can be reasonably expected to result in seriousphysical and/or material damage. Consult with your SANYO representative nearest you before usingany SANYO products described or contained herein in such applications.

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

Monolithic Linear IC

Car Stereo-Use5.5W 2-Channel AF Power Amplifier

Ordering number:ENN2636C

LA4446

SANYO Electric Co.,Ltd. Semiconductor CompanyTOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

21500TH (KT)/N3093TS/8240TS/9177AT, TS No.2636–1/7

Package Dimensionsunit:mm

3107-SIP13H

[LA4446]

SANYO : SIP13H

Features• Dual channels.

Output : 5.5W×2 (typ.)• Low pop noise at the time of power supply ON/OFF and

good starting balance.• Good ripple rejection : 46dB (typ.)• Good channel separation.• Low residual noise (Rg=0).• On-chip protectors.

a. Thermal protectorb. Overvoltage/surge protectorc. Adjacent pins (7-8, 6-7) short protector

˚C

˚C

Operating Conditions at Ta = 25˚C

SpecificationsAbsolute Maximum Ratings at Ta = 25˚C

0.40.5

3.4

1.15

25.6

10.0

2.4 2.0

1.2 2.00.8

1 13

1.0m

in

4.5

15.4

max

11

.811

.2 13

.9

retemaraP lobmyS snoitidnoC sgnitaR tinU

egatlovylppusmumixaMV CC 1xam )s03=t(tnecseiuQ 52 V

V CC 2xam gnitarepO 81 V

egatlovylppusegruS V CC egrus t≤ s2.0 05 V

tnerructuptuomumixaM IO kaep lennahcreP 5.3 A

noitapissidrewopelbawollA xamdP .citsiretcarahcaT–xamdPeeS 51 W

erutarepmetgnitarepO rpoT 57+ot02–

erutarepmetegarotS gtsT 051+ot04–

retemaraP lobmyS snoitidnoC sgnitaR tinU

egatlovylppusdednemmoceR V CC 2.31 V

ecnatsiserdaoldednemmoceR RL slennahc2 4 Ω

egnaregatlovgnitarepO V CC po 61ot01 V

LA4446

No.2636–2/7

Operating Characteristics at Ta = 25˚C, VCC=13.2V, RL=4Ω, f=1kHz, Rg=600Ω, with 100×100×1.5mm3

Al heat sink

Equivalent Circuit Block Diagram

Sample Application Circuit

retemaraP lobmyS snoitidnoCsgnitaR

tinUnim pyt xam

tnerructnecseiuQ occI 57 051 Am

niagegatloV GV 5.94 5.15 5.35 Bd

rewoptuptuO oP slennahc2,%01=DHT 0.5 5.5 W

noitrotsidcinomrahlatoT DHT PO W1= 2.0 0.1 %

ecnatsisertupnI ir 03 kΩ

egatlovesiontuptuO V ON0=gR 6.0 0.1 Vm

k01=gR Ω 0.1 0.2 Vm

noitcejerelppiR RRVS V,0=gR RCC zH001=rf,Vm002= 64 Bd

noitarapeslennahC pesHC k01=gR Ω mBd0=oV, 54 55 Bd

LA4446

No.2636–3/7

Sample Printed Circuit Pattern (Cu-foiled area)

* Mounting the heat sink, use a flat screw. Mounting torque : 39 to 59N · cm

Features of IC System· 2-channel use.· Decoupling capacitor C9=220µF is used to reject ripple and determine the delay time at the time of application of

power.· A low roll-off frequency depends on the NF capacitor. Refer to the graph. To extend fL, the output capacitor must be

also considered.· To make the pop noise much less, connect RNF’ to NF capacitors C1, C2 to decrease the gain.

VG≈20log [dB] RNF≈50Ω, Rf=20kΩ on chip

When RNF’=50Ω is connected to NF capacitors C1, C2 externally, the gain becomes approximately 46dB. WhenRNF’=150Ω is connected additionally, the gain becomes approximetely 40dB.

· Ripple rejection, total hermonic distortion, and oscillation depend on the layout of the printed circuit board. Large-signal GND, small-signal GND processing and parts GND points must be considered particularly.

· When providing external audio muting intentionally, the IC can be out off by connecting decoupling pin ™ to GNDthrough limiting resistor 50 to 100Ω.

Continued on next page.

RfRNF

LA4446

No.2636–4/7

Continued from preceding page.· The VCCout pin adjacent to other pins with a space of 2mm pitch is liable to undergo breakdown caused by solder

bridge in the manufacturing process. Therefore, pins ¶-•, ¶-§ DC short protectors are contained. The LA4446 isdesigned to operate from car-use voltage refulation 10.5 to 15.6V.

· Overvoltage/surge protector.Used to withstand giant pulses of positive surge 50V/200ms. The test is conducted based on the JASO standard inprinciple. The overvoltage protector is activated at VCCX≈24.5V.

· Thermal protector.Used to prevent instantaneous breakdown of the IC that may be caused by improper thermal design or abnormal statesuch as AC load short. The thermal protector is activated at Tj=160°C.

LA4446

No.2636–5/7

Sample BTL

LA4446

No.2636–6/7

Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guaranteesof the performance, characteristics, and functions of the described products as mounted in the customer'sproducts or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and allsemiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,or that could cause damage to other property. When designing equipment, adopt safety measures sothat these kinds of accidents or events cannot occur. Such measures include but are not limited to protectivecircuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or al l SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations,such products must not be expor ted without obtaining the expor t l icense from the authorit iesconcerned in accordance with the above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic ormechanical, including photocopying and recording, or any information storage or retrieval system,or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.

Any and all information described or contained herein are subject to change without notice due toproduct/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only ; it is notguaranteed for volume production. SANYO believes information herein is accurate and reliable, butno guarantees are made or implied regarding its use or any infringements of intellectual property rightsor other rights of third parties.

This catalog provides information as of February, 2000. Specifications and information herein are subject

to change without notice.

LA4446

PS No.2636–7/7