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.

Thick Film Hybrid IC

2ch AF Power Amplifier (Split Power Supply)(20W + 20W min, THD = 1%)

Ordering number:ENN2668A

STK41322

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

O2099TH (KT)/71696HA (ID)/O138YT/9058MO, TS No.2668–1/8

1 18

55.6

64.0

21.0 31

.0

16.5

(6.21) 17×2.54=43.18

3.6

0.52.54

8.5

0.42.9

5.5

4.0

25.8

Package Dimensionsunit:mm

4083

[STK41322]

Features• Pin compatible with the STK41022 and STK4101V

series (hith-grade type) over the output range 6 to 50Wfor easy interchangability

• Small-sized package with the same pin assignment asthe STK41012 series

• Built-in muting circuit to cut off spurious shock noise• 125°C guaranteed high temperature operation allows

greatly reduced heat sink size• Excellent low-cost performance

SpecificationsMaximum Ratings at Ta = 25˚C

retemaraP lobmyS snoitidnoC sgnitaR tinU

egatlovylppusmumixaM V CC xam 5.43± V

ecnatsiserlamrehT θ c-j 0.3

erutarepmetnoitcnuJ jT 051

erutarepmetetartsbusgnitarepO cT 521

erutarepmetegarotS gtsT 521+ot03–

tiucric-trohsdaolrofemitelbaliavA ts V CC R,V32±= L 8= Ω P,zH05=f, O W02= 2 s

˚C

˚C

˚C

˚C/W

Recommended Operating Conditions at Ta = 25˚CretemaraP lobmyS snoitidnoC sgnitaR tinU

egatlovylppuS V CC 32± V

ecnatsiserdaoL RL 8 Ω

SANYO : SIP18

STK41322

No.2668–2/8

Operating Characteristics at Ta = 25˚C, VCC=±23V, RL=8Ω (non-inductive load), Rg=600Ω, VG=40dB

Note.All tests are made using a constant-voltage supply unless otherwise specified.Available time for load short-circuit and output noise voltage are measured using the transformer supply specified below.The output noise voltage is the peak value of an average-reading meter with an rms value scale (VTVM). A regulated ACsupply (50Hz) should be used to eliminate the effects of AC primary line flicker noise.

Specified Transformer Supply (RP-25 or Equivalent)

+0–3 dB

retemaraP lobmyS snoitidnoCsgnitaR

tinUnim pyt xam

tnerructnecseiuQ I OCC V CC V82±= 02 04 001 Am

rewoptuptuOPO1 zHk02otzH02=f,%4.0=DHT 02 W

PO2 V CC R,%0.1=DHT,V02±= L 4= Ω,zHk1=f 02 W

noitrotsidcinomrahlatoT DHT PO zHk1=f,W0.1= 3.0 %

esnopserycneuqerF fL f, H PO ,W0.1= k05ot02 zH

ecnatsisertupnI ri PO zHk1=f,W0.1= 55 kΩegatlovlartueN VN V CC V5.05±= 07– 0 07+ Vm

egatlovesiontuptuO V ON V CC k01=gR,V82±= Ω 2.1 smrVm

egatlovgnituM VM 2– 5– 01– V

Equivalent Circuit

STK41322

No.2668–3/8

Sample Application Circuit PCB Layout (Copper Foil Surface)

Sample Application Circuit (20W min, 2-Channel, AF Power Amplifier)

STK41322

No.2668–4/8

STK41322

No.2668–5/8

STK41322

No.2668–6/8

External Component Description

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4C,3C

.sroticapacgnilpuoctupnIybdetceffaylesrevdaebnacesiontuptuoeht,seicneuqerfrewoltaregralsemocebecnatcaerroticapacecniS.gnikcolbCDroF

esionpopevomerotredronI.nesohcebdluohseulavecnatcerrewola,esacsihtnI.esionf/1tnedneped-ecnatsiserecruoslangisrellamsdna,tnatsnocemittupniehtnimretedhcihw,4Cdna3Crofnesohcebdluohsecnaticapacfoseulavregral,no-rewopta

.tiucricFNehtni6Cdna5Crofseulav

6C,5C

.sroticapacFN.ycneuqerfffotucedis-wolehtenimretedesehT

esaercniotdnetdluowsihtesuaceb,revewoH.seicneuqerfwoltaniagegatlovniatniamot5CrofnesohcebdluohsseulavegralA.dediovaebdluohsyrassecenyletulosbanahtregralseulava,no-rewoptaesionkcohseht

51C .sroticapacgnilpuoceD.ylppusehtmorfegatlovelppirdnaesionkcohssevomersihT

21C,11C .sroticapacpartstooB.yltnacifingissesaercniseicneuqerfwoltanoitrotsidcinomrahlatotehtneht,llamsedamerasroticapacesehtfI

01C,9C.sroticapacnoitneverpnoitallicsO

CIelbatsedivorpecnehdnaecnadepmiylppusecuderotsnipylppusCIehtotelbissopsaesolcsadetresniebdluohsesehT.dednemmocererasroticapaccitylotcelE.noitarepo

41C .roticapacretlifelppiR.01RTrotsisnartlanretnihtiwnitanibmocniretlifelppirasmrofsihT

7C .sroticapacnoitneverpnoitallicsO.scitsiretcarahcycneuqerfdnalamrehttnellecxeriehtrofdednemmocererasroticapacralyM

4R,3R .srotsiserretliftupnI

2R,1R .srotsisersaibtupnI.ecnatsisersihtybdenimretedylegralsiecnadepmitupniehT.laitnetoporeatasniptupniehtsaibotdesueraesehT

9R,5R)01R,6R(

.srotsisergnittesGVniag-egatloV065=6R,5RgnisudednemmocersiBd04=GV Ω k65=01R,9Rdna, Ω niagfI.6Rdna5RgnisuedamtseberastnemtsujdaniaG.

Vniatniamot01R,9R=2R,1Rtesneht,6Rdna5Rgnisuedamerastnemtsujda N .ytilibatsecnalab

31R,11R)41R,21R(

.srotsiserpartstooBk2.2foseulaV.tnerructnecseiuqehtenimretedsrotsiseresehT Ω k2.2dna Ω .dednemmocerera

12R .rotsisetretlifelppiR.stiucrictrohsdaolgnirudrotsisergnitimilrotsisnartrevirderpsasmrofreprotsisersihT

81R .rotsiserecnalabsunim/sulpgnippilC

02R,91R.srotsiserretlifelppiR

V–ot11RThguorhtdnuorgmorfswolftnerruc,nosi11RTrotsisnartgnitumnehW CC k1foseulaV. Ω k1dna)W5.0( Ω era)W5.0(.dednemmocer

61R,51R .srotsisernoitneverpnoitallicsO

fL= [Hz]2π × C5 × R5

1

STK41322

No.2668–7/8

Sample Application Circuit (Protection and Muting Circuit)

Heatsink DesignThe total STK41322 device power dissipation for a con-tinuous sine wave signal is shown in figures 1 and 2. Themaximum dissipation is 29.2W for RL=8Ω, and 42.8W forRL=4Ω (2-channel simultaneous drive).

Figure 1. Pd – PO (RL=8Ω) Figure 2. Pd – PO (RL=4Ω)

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 October, 1999. Specifications and information herein are subject

to change without notice.

STK41322

PS No.2668–8/8

When estimating the power dissipation for an actual audiosignal input, the rule of thumb is to select Pd correspond-ing to (1/10) × PO max (within safe limits) for a continuoussine wave input. For example,

Pd=18.6W for 8Ω, and Pd=23W for 4Ω

The heatsink thermal resistance, θj-a, required to dissipatethe STK41322 device total power dissipation, Pd, is deter-mined as follows :

Condition 1: IC substrate temperature not to exceed 125°CTC=Pd×θc-a+Ta<125°C ..................................... (1)

where Ta is the guaranteed maximum ambient temperature.

Condition 2: Power transistor junction temperature, Tj, notto exceed 150°C

Tj=Pd×θc-a+Pd/4×θj-c+Ta<150°C .................... (2)

The STK41322 has 4 power transistors (2 per channel),and the thermal resistance per transistor, θj-c, is 3.0°C/W.Therefore, equation 2 becomes :

Pd× (θc-a+3.0/4)+Ta<150°C .............................. (3)

The required heatsink must have a thermal resistance thatsatisfies both expressions 1 and 3. Figure 3 shows the am-bient temperature parameter against Pd and θj-a calculatedfrom equations 1 and 3.

Figure 3. θc-a – Pd

For example, a stereo amplifier with ambient temperatureof Ta=50°C needs a heatsink with thermal resistance givenby the following :

For VCC=±23V, RL=8Ω :1/10 PO max corresponds Pd1=18.6WFrom figure 3, the STK41322 thermal resistance isθc-a1=4.01°C/WFrom equation 3, this results in a junction temperatureTj=139.1°C

For VCC=±20V, RL=4Ω :1/10 PO max corresponds Pd2=23WFrom figure 3, the STK41322 thermal resistance isθc-a2=3.26°C/WFrom equation 3, this results in a junction temperatureTj=142.3°C