powersoft MiniMod 4 User manual

Keep this manual
for future reference
©2019 Powersoft
USER GUIDE
MiniMod 4
DO000243.00 Rev. 00

powersoft_MiniMod4_uguide_en
Data are subject to change without notice.
For latest update please refer to the
online version available on www.powersoft-audio.com.

Table of contents
1.Important safety instructions iii
2.Importantes instructions de sécurité iv
3.Instrucciones de seguridad importantes v
4.Importanti istruzioni di sicurezza vi
5.Regulatory information vii
6.Electrostatic Discharge (ESD) viii
7. MiniMod4 1
7:1.Welcome 1
7:2.Unpacking & checking for shipping damage 1
7:3.Disposal of the packing material 1
8.Thermal constraints 2
8:1.Heatsink performance 2
9.Electromagnetic Compatibility (EMC) & Safety 3
9:1.AC MAINS filter 3
9:2.Cabling 3
9:3.Ferrite cores 3
9:4.Chassis shielding 3
9:5.Mains Fuse 3
9:6.Earth connection 3
10.Mechanical drawings 4
11.Connections 5
11:1.Grounding 5
11:2.Bill of connectors 5
11:2.1.PL2 pinout (B3P-VH JST) 6
11:2.3.PL1000, PL3000 pinout 6
11:2.2.PL4 pinout (molex 22-27-2031) 6
11:2.4.PL1001, PL2001 pinout 9
11:3.LED encoding 9
11:4.Internal Signal Path Polarity 10
11:5.Output Configuration 10
12.Protections 12
12:1.Fan control 12
12:1.1.Primary AC mains overcurrent protection 12
12:1.2.Primary AC mains overvoltage protection 12
12:1.3.Primary thermal protection 12
12:2.Amplifier protections 12
12:2.1.Amplifier Thermal protection 12
12:2.2.Output short circuit 12
12:2.3.High frequency protection 13
13.Cable Kit - KT000349 14
13:1.Mains Cable – CB000727 14
13:2.Output cable, 4 x SE – CB000731 15
13:3.Output cable, 2 x BTL – CB000730 16
13:4.Output cable, 2 x PTL – CB000733 17
13:5.Output cable, 1 x PBTL – CB000732 18
14.Evaluation Board - KTP00477 19
14:1.Switch functions 19
14:2.Test points 20
14:3.LED Description 21
14:4. Thermal Limiter THR 22
14:5.Clip limiter + limiter bypass 23
14:6.Mute/Unmute 23
14:7.AUX Voltage selector 23
14:8.TempMon LED bar 23
14:9.Bypass entire EVB 23
14:10.Block diagram 24
14:11.Silkscreen 25
14:12.Schematic 26
14:13.Power + Energy Save 28
15.Support and warranty 29
15:1.Service 29
15:2.Warranty 29
15:2.1.Return of Goods 29
15:2.2.Repair or replacement 29
15:2.3.Cost and responsibility of transport 29
15:3.Assistance 29
16.Specifications 30
| i

ii | MiniMod 4 | User guide
Page intentionally left blank

Important safety instructions
This amplifier module is intended to be installed inside
other devices and must be checked in the final product.
EXPLANATIONS OF GRAPHICAL SYMBOLS
The triangle with the lightning bolt is used to alert the
user to the risk of electric shock.
The triangle with the exclamation point is used to
alert the user to important operating or maintenance
instructions.
The CE-mark indicates the compliance with the low
voltage and electromagnetic compatibility.
Symbol for earth/ground connection.
Symbol for conformity with Directive 2002/96/EC
and Directive 2003/108/EC of the European
Parliament on waste electrical and electronic equip-
ment (WEEE).
Symbol for electrostatic discharge sensitive devices.
CAUTION
RISK OF ELECTRICK SHOCK
DO NOT OPEN
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this equipment near water.
6. Do not block any ventilation openings. Install in accordance with
Powersoft’s instructions.
7. Do not install near any heat sources such as radiators, heat regis-
ters, stover or other apparatus that produce heat.
8. Do not defeat the safety purpose of the polarized or grounding-
type plug.
9. Only use attachments/accessories specified by Powersoft.
10. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way, such
as power-supply cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has
been dropped.
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT ATTEMPT
TO OPEN ANY PART OF THE UNIT. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE,
DRIPPING OR SPLASHING LIQUIDS. OBJECTS FILLED WITH
LIQUIDS, SUCH AS VASES, SHOULD NOT BE PLACED ON THIS
APPARATUS.
SPEAKER TERMINALS COULD BE HAZARDOUS LIVE IF
SPEAKER BRIDGE MODE CONNECTION IS USED.
PROPER CONNECTIONS AND INSULATIONS TECHNIQUES
MUST BE ADOPTED WHEN SPEAKER BRIDGE MODE
CONNECTION IS USED.
1
Important safety instructions | iii

Importantes instructions de sécurité 2
Ce module d’amplification est destiné à être
installé à l’intérieur d’autres dispositifs et doit
donc être contrôlé sur le produit fini. AVIS
RISQUES D’ÉLECTROCUTION
NE PAS OUVRIR
EXPLICATION DES SYMBOLES GRAPHIQUES
La triangle avec le symbol du foudre est employée
pour alerter l’utilisateur au risque de décharge élec-
trique.
Le triangle avec un point d’exclamation est employée
pour alerter l’utilisateur d’instruction importantes
pour lors opérations de maintenance.
1. Lisez ces instructions.
2. Gardez ces instructions.
3. Tenez compte de toutes les mises en garde.
4. Suivez toutes les instructions.
5. N’utilisez pas cet amplificateur à proximité de l’eau.
6. Assurez-vous d’une bonne ventilation de l’appareil. Installez en
accord avec les instructions préconisées par Powersoft.
7. N’installez pas l’appareil à proximité de sources de chaleur ou
d’autres appareils produisant de la chaleur.
8. Respectez le dispositif de mise à la terre de la prise secteur.
9. Utilisez uniquement les accroches et accessoires spécifiés par
Powersoft.
10. Confiez toute réparation à un technicien qualifié. L’intervention
d’un technicien est nécessaire dans les cas suivants : le cordon
d’alimentation ou la prise secteur sont endommagés, des corps
étrangers ou du liquide se sont introduits dans l’appareil, l’appareil
a été exposé à la pluie ou à l’humidité, l’appareil montre des
signes de dysfonctionnement ou est tombé.
MISE EN GARDE : AFIN DE RÉDUIRE LES RISQUES DE CHOC
ÉLECTRIQUE, N’ESSAYEZ PAS D’OUVRIR L’UNITÉ, MEME EN
PARTIE. AUCUNE PIÈCE A L’INTERIEUR NE PEUT ETRE CHANGÉE PAR
L’UTILISATEUR. LAISSEZ L’ENTRETIEN A UN PERSONNEL QUALIFIÉ.
NE PAS EXPOSER CET APPAREIL A LA PLUIE OU A L’HUMIDITÉ,
AUX GOUTTES OU AUX ÉCLABOUSSURES. LES OBJETS
REMPLIS DE LIQUIDE, TELS QUE LES VASES, NE DOIVENT PAS ETRE
PLACÉS SUR CET APPAREIL.
LES BORNES D’ENCEINTES POURRAIENT ÊTRE DANGEREUX SI
LA CONNEXION DE MODE PONT DU HAUT-PARLEUR EST
UTILISÉ.
ADOPTER DES TECHNIQUES CORRECTES DE CONNEXION ET
D’ISOLEMENT LORSQUE LA CONNEXION EN MODE BRIDGE
HAUT-PARLEUR EST UTILISÉ.
Le marquage CE indique la conformité à la directive de
basse tension et la compatibilité électromagnétique.
Symbole pour la connexion à la terre.
Symbole pour la conformité al la Directive 2002/96/
EC et la Directive 2003/108/EC du Parlement
Européen sur les équipements électriques et élec-
troniques (WEEE).
Symbole pour les appareils sensibles aux décharges
électrostatiques.
iv | MiniMod 4 | User guide

Instrucciones de seguridad importantes
Este módulo amplificador está diseñado para
ser instalado dentro de otros dispositivos y
debe verificarse en el producto final.
3
PRECAUCIÓN
RIESGO DE CHOQUE ELÉCTRICO
NO ABRA LA UNIDAD
EXPLICACIÓN DE LOS SÍMBOLOS GRÁFICOS
El triángulo con el símbolo de rayo eléctrico es usa-
do para alertar al usuario de el riesgo de un choque
eléctrico.
El triángulo con el signo de admiración es usado
para alertar al usuario de instrucciones importantes
de operación o mantenimiento.
1. Lea estas instrucciones.
2. Guarde estas instrucciones.
3. Preste atención a todas las advertencias.
4. Siga todas las instrucciones.
5. No use este aparato cerca del agua.
6. No bloquee las aberturas de ventilación. Realice la instalación de
acuerdo con las indicaciones de Powersoft.
7. No instale cerca ninguna fuente de calor como, por ejemplo,
radiadores, rejillas de calefacción, hornos u otros aparatos que
produzcan calor.
8. No elimine el diseño de seguridad del enchufe, ya sea del tipo po-
larizado o con conexión a tierra.
9. Use exclusivamente los dispositivos/accesorios indicados por
Powersoft.
10. El servicio técnico debe realizarlo siempre personal cualificado. Se
requerirá servicio de asistencia técnica cuando el aparato sufra
algún tipo de daño como, por ejemplo, que el cable de alimentación
o el enchufe estén dañados, que se haya derramado líquido o hayan
caído objetos dentro del aparato, que éste se haya expuesto a la llu-
via o humedad, que no funcione normalmente o que se haya caído.
PRECAUCIÓN: PARA REDUCIR EL RIESGO DE DESCARGA
ELÉCTRICA, NO DESMONTE LA TAPA (NI EL PANEL TRASERO).
NO HAY PIEZAS REPARABLES POR EL USUARIO EN EL INTERIOR.
LLÉVELO A REPARAR A PERSONAL DE SERVICIO CUALIFICADO.
NO EXPONGA ESTE UNITAD A LA LLUVIA O LA HUMEDAD,
GOTEO O SALPICADURAS. NO COLOQUE OBJETOS LLENOS DE
LÍQUIDOS, TALES COMO VASIJAS, SOBRE EL APARATO.
TERMINALES DE LOS ALTAVOCES PODRÍA SER PELIGROSO, SI
SU CONEXIÓN SE UTILIZA EL ALTAVOZ MODO PUENTE.
ADOPTAR TÉCNICAS CORRECTAS DE CONEXIÓN Y
AISLAMIENTO CUANDO SE USA CONEXIÓN DE ALTAVOZ MODO
PUENTE.
La marca CE indica el cumplimiento de la directiva
de bajo voltaje y de compatibilidad electromagnética.
Símbolo de la conexión a tierra.
Símbolo de conformidad con la Directiva 2002/96/
EC y Directiva 2003/108/EC del Parlamento Europeo
sobre los aparatos eléctricos y electrónicos (WEEE).
Símbolo para los dispositivos sensibles a descargas
electrostáticas.
Instrucciones de seguridad importantes | v

Importanti istruzioni di sicurezza 4
1. Leggere queste istruzioni.
2. Conservare le istruzioni.
3. Tenere conto di tutti gli avvisi.
4. Seguire tutte le istruzioni.
5. Non usare l'apparecchio in prossimità di acqua.
6. Non ostruire le prese di ventilazione. Installare secondo le indica-
zioni del produttore.
7. Non installare vicino a fonti di calore quali radiatori, bocchette
dell'aria calda, stufe o altri apparecchi (compresi gli amplificatori)
che producono calore.
8. Non compromettere la sicurezza delle spine polarizzate o con
messa a terra.
9. Usare solo accessori specificati dal produttore.
10. Ricorrere a personale qualificato per qualsiasi intervento. Tali
interventi sono necessari in caso di guasti dell'apparecchio
quali danneggiamento del cavo di alimentazione o della spina,
versamento di liquidi o caduta di oggetti nell'apparecchio, es-
posizione a pioggia o umidità o se l'apparecchio non funziona
normalmente o è caduto.
ATTENZIONE
RISCHIO DI SCOSSE
ELETTRICHE, NON APRIRE
ATTENZIONE: PER RIDURRE IL RISCHIO DI SCOSSE
ELETTRICHE, NON TENTARE DI APRIRE ALCUNA PARTE
DELL’UNITÀ. NON CI SONO PARTI INTERNE AD USO DELL’UTENTE.
RIVOLGERSI A PERSONALE QUALIFICATO PER L’ASSISTENZA.
NON ESPORRE QUESTO APPARECCHIO ALLA PIOGGIA,
UMIDITÀ O SOSTANZE LIQUIDE. OGGETTI PIENI DI LIQUIDI,
COME VASI, NON DEVONO ESSERE COLLOCATI SU QUESTO APPARATO.
I TERMINALI DEI DIFFUSORI POTREBBERO ESSERE
PERICOLOSI, SE VIENE UTILIZZATA LA CONNESSIONE IN
MODALITÀ BRIDGE DEGLI ALTOPARLANTI.
ADOTTARE LE CORRETTE TECNICHE DI CONNESSIONE E
ISOLAMENTO QUANDO VIENE UTILIZZATA LA CONNESSIONE
IN MODALITÀ BRIDGE DEGLI ALTOPARLANTI.
SPIEGAZIONE DEI SIMBOLI GRAFICI
Il triangolo con il lampo è utilizzato per avvisare
l’utente del rischio di scossa elettrica.
Il triangolo con il punto esclamativo è utilizzato per
avvisare l’utente di importanti istruzioni d’uso e ma-
nutenzione.
Il marchio CE indica la conformita’ del prodotto a
tutte le direttive europee applicabili
Simbolo della connessione di terra.
Simbolo di conformità alla Direttiva 2002/96/CE e
alla Direttiva 2003/108/CE del Parlamento Europeo
sulle apparecchiature elettriche ed elettroniche
(RAEE).
Simbolo per le apparecchiature sensibili alle scariche
elettrostatiche
Questo modulo amplificatore è destinato ad essere
installato dentro altri dispositivi e deve quindi
essere controllato nel prodotto finito.
vi | MiniMod 4 | User guide

FCC COMPLIANCE NOTICE
This device complies with part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
CAUTION: Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment gener-
ates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful
interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equip-
ment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the
following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.
WEEE DIRECTIVE
If the time arises to throw away your product, please recycle all the
possible components.
This symbol indicates that when the end-user wishes
to discard this product, it must be sent to separate col-
lection facilities for recovery and recycling. By separat-
ing this product from other household-type waste, the
volume of waste sent to incinerators or land-fills will be
reduced and natural resources will thus be conserved.
The Waste Electrical and Electronic Equipment Directive (WEEE Directive)
aims to minimise the impact of electrical and electronic goods on the en-
vironment. Powersoft S.p.A. comply with the Directive 2002/96/EC and
2003/108/EC of the European Parliament on waste electrical finance the
cost of treatment and recovery of electronic equipment (WEEE) in order
to reduce the amount of WEEE that is being disposed of in land-fill site.
All of our products are marked with the WEEE symbol; this indicates that
this product must NOT be disposed of with other waste. Instead it is the
user’s responsibility to dispose of their waste electrical and electronic
equipment by handing it over to an approved reprocessor, or by return-
ing it to Powesoft S.p.A. for reprocessing. For more information about
where you can send your waste equipment for recycling, please contact
Powesoft S.p.A. or one of your local distributors.
Regulatory information 5
EC DECLARATION OF CONFORMITY
Manufacturer:
Powersoft S.p.A.
via E. Conti 5
50018 Scandicci (Fi)
Italy
We declare that under our sole responsibility the products:
Model Name: MiniMod4
Intended use: Professional Audio Amplifier Module
Are in conformity with the provisions of the following EC Directives,
including all amendments, and with national legislation implementing
these directives:
2014/35/EU Low Voltage Directive
2014/30/EU Electromagnetic Compatibility Directive
2011/65/EU RoHs Directive
2014/53/EU Radio Equipment Directive
The following harmonized standards are applied:
EN 55103-1: 2009 /A1: 2012
EN 55103-2: 2009 /IS: 2012
EN 55032: 2012
EN 55035: 2017
EN 60065: 2014 /AC: 2016
Scandicci,
February 2019
Luca Lastrucci
Managing Director
For compliance questions only: [e-mail]
4
Regulatory information | vii

Electrostatic Discharge (ESD) 6
Electrostatic discharge (ESD) is one of the most signi-
cant factors leading to damage and failure of a wide variety
of electronic components.
Poor handling can cause internal damage, which is
invisible. This internal damage can then cause electrical
failure or reliability problems.
It is recommended that all workstations where
Electrostatic Discharge Sensitive devices (ESDS)
and assemblies are handled outside of full static protection
packaging (i.e. within static control areas) should be pro-
vided with some form of ground conductive or dissipative
ooring.
viii | MiniMod 4 | User guide

6
MiniMod4 UserGuide UserGuideUserGuide 7
7:1.Welcome
Congratulations on your purchase of the Powersoft
MiniMod4 module.
We know you are eager to use the MiniMod4 module,
but please take a moment to read this user’s manual and
safety instructions. In case you have any questions, please
do not hesitate to contact your dealer or Powersoft.
The MiniMod4 is a four channel amplier modules spe-
cically designed to drive high power loudspeakers.
The MiniMod4 represents an important evolution in pow-
er amplier modules: extremely compact and lightweight
MiniMod4 can be easily integrated into any appliance such
as active loudspeakers and stand alone rack ampliers.
The new design of the power supply equipped
with PFC, reduces power consumption (less than
0.55 W in standby) while enhancing reliability and
consistency in all operating conditions. The high ef-
ciency of the output stage improves overall perfor-
mance delivering pristine power and clean output signal.
A dedicated optional DSP board can be easily plugged to
the module providing a complete solution in a compact
package.
Powersoft MiniMod4 is the ultimate exible platform
suiting your application design.
7:2.Unpacking& checking for shipping damage
Your Powersoft product has been completely tested and
inspected before leaving the factory. Carefully inspect the
shipping package before opening it, and then immediately
inspect your new product. If you nd any damage notify the
shipping company immediately.
7:3.Disposal of the packing material
The transport and protective packing has been selected
from materials which are environmentally friendly for dis-
posal and can normally be recycled.
Rather than just throwing these materials away, please
ensure they are offered for recycling.
MiniMod4 | 1

8
Thermal constraints
This device must be correctly heatsinked for proper and
reliable operation: an appropriate external passive heat sink
guarantees by design thermal efciency and reliability.
Proper heatsink planarity is strongly suggested to al-
low thermal transfer from the module’s bottom plate to the
heatsink; a thermal compound may be used, but it is not
strictly necessary.
In order to ensure proper ventilation of the module, rea-
sonable spacing of at least 100 mm must be left between
the frame of the unit and any side component or surface of
the enclosure.
The module has been designed to t into a loudspeaker
cabinet: please refer to FIGURE 1 for proper module placing.
IN FIGURE 1 HEATSINK FINS ARE SET HORIZONTALLY
(WRONG!) ONLY FOR DESCRIPTIVE PURPOSE.
All conguration showed in FIGURE 1 are viable for
proper module placing and cooling. We suggest to posi-
tion the module vertically with respect the ground in order
to take advantage of the chimney effect for ventilation and
heat dissipation.
In FIGURE 1.athe module and the loudspeakers share
the same room into the cabinet. This is the default place-
ment solution: it allows good ventilation because of woofer
diaphragm movement and high air volume; be aware of
magnetic eld interaction: place the module far enough from
loudspeakers magnet in order to prevent fans blockage.
FIGURE 1.bshows the more efcient cooling congura-
tion, even if it is less effective against dust and moisture
that can get into the module. By allowing external air ow,
it is possible to reduce the ns width on the heatsink by
maintaining good cooling performances.
8:1.Heatsink performance
Here we suggest a rule of thumb to calculate the thermal
resistance of the heatsink.
The absolute thermal resistance of the heatsink is the
temperature difference (kelvin or celsius) across it structure
when a unit of heat energy ows through it in unit time (watt).
For seek of simplicity: a heatsink with low thermal resistance
offers high heat dissipation, as well as a low electric resist-
ance allows high current owing through a conductive wire.
In order to dene the maximum allowed thermal resist-
ance for the heatsink let assume the following:
 eas the amp module efciency
 cf as the crest factor of the audio signal
 Wmax as the peak power delivered by the module
 Tamb as the highest ambient temperature
 Tmod as the highest operating temperature
The thermal resistance of the heatsink derives from the fol-
lowing formula:
The maximum dissipated power can be calculated as:
set at 75°C (167°F) on the bottom plate and stating an ambi-
ent temperature of 45 °C (113°F), the previous example gives:
meaning that the temperature of the bottom plate is always
lower than 75°C if the heatsink has a thermal resistance
better than 0.14°C/W (or 0.14 K/W) with ambient temperature
up to 45 °C.
For example, stating an efciency of 80%, 6 dB crest factor
and 3400 W peak power, the dissipated heat is:
Supposing that the thermal protection of the module (Tmod) is
100 mm
3.94 inch
Be aware of
magnetic leakage
MIN.
Do not obstruct
air ow
Be aware of
air leakage
FIGURE 1: Cooling solutions
(for descriptive purpose
the heatsink fins are set in
wrong direction);
a) Module and loudspeaker
into the same chamber;
b) Module in a separate
vented chamber.
Dissipated power = cf
Wmax (1 - e)
Rth = Dissipated power
Tmod - Tamb
= 0.14°C/W
170
75 - 45
= 170 W
4
3400 (1 - 0.8)
2 | MiniMod 4 | User guide
a
b

8
9
Electromagnetic Compatibility (EMC) & Safety
9:1.AC MAINS filter
In order to improve the electromagnetic compatibility
an EMC lter must be inserted before the AC MAINS
plugs on the power supply. Powersoft suggests:
YUNPEN YK03T1
9:2.Cabling
Wiring between the amp module and the load may lead
to radio frequency noise. The following guide lines should
be observed:
 reduced cabling length is advisable;
 keep cable pairs as close as possible to each other in
order to minimize the antenna effect;
 design the cabling path far from RF noise source;
 set the cabling for RF noise rejection: shielded or
twisted cables are advisable conguration (ref.
FIGURE 4);
 use electromagnetic compatibile connectors.
 place ferrites as close to the module as possible
9:3.Ferrite cores
Reject RF noise from input and output cabling by in-
stalling ferrite shields. Powersoft suggests the FAIR RITE
0431164181, or equivalent.
9:5.Mains Fuse
MiniMod 4 is equipped with an internal Time Delay
fuse rated at 4A. Thhis fuse must be replaced only by an
authorized Powersoft service center.
9:6.Earth connection
This device must be powered exclusively by earth
connected mains sockets in electrical networks
compliant to the IEC 364 or similar rules. Is absolutely nec-
essary to verify this fundamental requirement of safety and,
in case of doubt, require an accurate check by a qualied
personal.
Is absolutely necessary to ground this device using the
proper earth connection on the metal frame of the chas-
sis; use M4 nut and bolt with proper split washer – grover
washer – to secure the earth terminal lug.
Wrap both cables around one side of each ferrite so that
it pass through each ferrite twice (ref. FIGURE 3). Install the
ferrite shield as close as possible to where the cable plugs
into the amplier. Placing the ferrite elsewhere on the cable
noticeably reduces its effectiveness.
9:4.Chassis shielding
If not already present on the product, a full body metal
chassis or a shielding cage will provide best shielding of RF
emission. In order to achieve the highest shielding, minimize
the amount and size of holes or opening in the chassis.
FIGURE 2: Typical electrical schematic of the EMI Filter. FIGURE 3: Ferrite core installation on I/O wirings.
Loose pair
Configuration
prone to high
RF noise
Parallel pair
Configuration
prone to RF noise
Twisted pair
Highly immune
to RF noise
Shielded pair
Highly immune
to RF noise
FIGURE 4: Cabling configuration.
Input
signal
FIGURE 5: Tools and best practice for improving
the electromagnetic compatibility.
AC MAINS filter
Chassis shielding
Amp module
inside
Ferrite core
Ferrite core
Output signal
Electromagnetic Compatibility (EMC) & Safety | 3

4 | MiniMod 4 | User guide
10
Mechanical drawings
FIGURE 6: MiniMod4 side and back plate (all dimensions in millimeters).
UNIT:
millimeters
(mm)
(190)
(80)
O4,34x
(42)
(2)
71,5
181,54,25 4,25
4,25 4,25
MATERIAL
TREATMENT
DESCRIPTION
ITEM
DATE SCALE AUTHOR APPROV. GENERAL
TOLERANCES
UNI-ISO
2768-M
ACCORDING WITH THE LAW, WE RESERVE
THE
PROPERTY OF THIS DRAWING. IT CANNOT
BE
REPRODUCED OR OTHERWISE MAKE KNOW
TO
OTHER COMPANIES OR COMPETITORS
WITHOUT OUR PERMISSION
DRAWING
CODE
WEIGHT
VOLUME
REV
REV.
01
02
03
04
DATE
-
-
-
-
DESCRIPTION
-
-
-
-
AUTHOR
-
-
-
-
SHEETS
A3 Format -
420 x 297
POWERSOFT S.p.A.
Via E.Conti, 5 - 50018 Scandicci (FI) - Italy
Tel. [phone] - fax [phone]
http://www.powersoft.it PF000477 0,0 kg
raveggi
0,0 dm^3
.
.MINIMOD 4
-
1:1 1 / 1
-
-
17/05/2018

Connections | 5
10
11
Connections
11:1.Grounding
The amplier module is intended to be assembled in an
End Product.
In the End Product, the metal plate of the amplier module
shall be mechanically xed and electrically connected to
conductive parts connected to protective earth – PE.
The main PE connector of the End Product shall be
connected to the chassis, or to the accessible conductive
enclosure parts, with suitable measures according the
standard and applicable national deviations.
Any EMI lter added into the mains cable must be
screwed to grounded metal parts of the chassis and its PE
cable must be connected to grounding point of end product.
11:2.Bill of connectors
CODE NAME TYPE
PL1000
PL3000 Input connector IDC socket 34 pin
PL1001
PL2001 Output connector JST B6P-VH
PL2 AC Mains JST B3P-VH
PL4 FAN Molex 22-27-2031
Mating connectors, not provided
Loudspeaker wires housing: JST VHR-6N
Mains connector housing: JST VHR-3N
Terminals: SVH-41T_P1-1
Fan connector: Molex 22-01-2035
Terminals: KK 254 4809 series
PL3000 PL1000
PL2001 PL1001
PL2
PL4

6 | MiniMod 4 | User guide
11:2.2.PL4 pinout (molex 22-27-2031)
Pin# Symbol Description
1GND Ground connection
2HOT +12 V, 100 mA max current draw (fan)
3GND Ground connection
The PL4 molex plug in intended for connecting a fan whose
activation is driven by the temperature.
11:2.3.PL1000, PL3000 pinout
11:2.1.PL2 pinout (B3P-VH JST)
PL1000 pinout (IDC 34p)
Pin# Name IN OUT POWER Range Scale Factor Impedance Tolerance Description
1SDPWS PActive High, Logic input 3,3 to
12Vdc 1kΩ Powers Supply Shut Down
2READY 13 Phigh when output stage is
operative 3,9-4,1 100K TBD
3RESERVED
4+5VDC OUT P+5Vdc out 20mA max current
available +/-5%
5AUXVSEL POpen: select 15V for auxiliary voltage. Short to ground: select
12V for auxiliary voltage
Internal pull-up 10kΩ @
12V
6 IN 1 + P Unbalanced: 1,41Vrms for full output shorting pin 7 to GND.
8Vrms absolute max input. 9,4kΩ Channel 1 Positive
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 9,4kΩ
7 IN 1 - P Unbalanced: 1,41Vrms for full
output. 8Vrms absolute max input. 4,7kΩ Channel 1 Negative
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 3,1kΩ
8GND PGround
9VOUT1MON P20V/V 4,5kΩ Channel 1 Output Voltage
Monitor
10 PROTECT 12 P Level 1 (4.5V to 5V) not in protection. Level 0 (0V to 0.5V) in
Protection 4,7kΩ Channel 1 & Channel 2
Output Stage Protection
Monitor
11 IOUT1MON P8,35A/V 4,7kΩ Channel 1 Output Current
Monitor
12 TEMPMON P0-5V 100kΩ NTC sensor tap output
13 +12/15VDC OUT P +12V @ 0,8A or +15V @ 0,6A +/-10% Positive regulated analog section supply (same as
pin 22)
14 -12/15VDC OUT P -12V @ 0,2A or -15V @ 0,2A +/-10% Negative regulated analog section supply (same as
pin 21)
15 MUTE13 PActive Low, To be pulled to GND
by current sink at least 2mA CH1-CH2-CH3-CH4 Output stage disable PWM
16 +VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Positive Monitor
17 -VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Negative Monitor
18 -VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Negative Monitor
19 +VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Positive Monitor
20 MUTE PActive Low, To be pulled to GND
by current sink at least 2mA CH1-CH2-CH3-CH4 Output stage disable PWM
21 -12/15VDC OUT P -12V @ 0,2A or -15V @ 0,2A +/-10% Negative regulated analog section supply (same as
pin 21)
22 +12/15VDC OUT P +12V @ 0,8A or +15V @ 0,6A +/-10% Positive regulated analog section supply (same as
pin 22)
23 TEMPMON P0-5V TBD 1kΩ NTC sensor tap output
24 IOUT2MON P8,35A/V 4,7kΩ Channel 2 Output Current
Monitor
Pin# Symbol Description
1 L AC Mains: phase input
2n/c not connected
3 N AC Mains: neutral input

Connections | 7
Pin# Name IN OUT POWER Range Scale Factor Impedance Tolerance Description
25 PROTECT 12 P Level 1 (4.5V to 5V) not in protection. Level 0 (0V to 0.5V) in
Protection 4,7kΩ Channel 1 & Channel 2
Output Stage Protection
Monitor
26 VOUT2MON P20V/V 4,5kΩ Channel 2 Output Voltage
Monitor
27 GND PGround
28 IN 2 - P Unbalanced: 1,41Vrms for full
output. 8Vrms absolute max input. 4,7kΩ Channel 2 Negative
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 3,1kΩ
29 IN 2 + P Unbalanced: 1,41Vrms for full output shorting pin 7 to GND.
8Vrms absolute max input. 9,4kΩ Channel 2 Positive
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 9,4kΩ
30 GND PGround
31 +5VDC OUT P+5Vdc out 20mA max current
available +/-5%
32 RESERVED
33 READY 12 POpen Collector, high when output
stage is operative TBD TBD
34 SDPWS PActive High, Logic input 3,3 to
12Vdc 1kΩ Powers Supply Shut Down

8 | MiniMod 4 | User guide
PL3000 pinout (IDC 34p)
Pin# Name IN OUT POWER Range Scale Factor Impedance Tolerance Description
1SDPWS PActive High, Logic input 3,3 to
12Vdc 1kΩ Powers Supply Shut Down
2READY 34 POpen Collector, high when output
stage is operative TBD TBD
3RESERVED
4+5VDC OUT P+5Vdc out 20mA max current
available +/-5%
5AUXVSEL POpen: select 15V for auxiliary voltage. Short to ground: select
12V for auxiliary voltage
Internal pull-up 10kΩ @
12V
6 IN 3 + P Unbalanced: 1,41Vrms for full output shorting pin 7 to GND.
8Vrms absolute max input. 9,4kΩ Channel 3 Positive
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 9,4kΩ
7 IN 3 - P Unbalanced: 1,41Vrms for full
output. 8Vrms absolute max input. 4,7kΩ Channel 3 Negative
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 3,1kΩ
8GND PGround
9VOUT3MON P20V/V 4,5kΩ Channel 3 Output Voltage
Monitor
10 PROTECT 34 P Level 1 (4.5V to 5V) not in protection. Level 0 (0V to 0.5V) in
Protection 4,7kΩ Channel 3 & Channel 4
Output Stage Protection
Monitor
11 IOUT3MON P8,35A/V 4,7kΩ Channel 3 Output Current
Monitor
12 TEMPMON P0-5V TBD 1kΩ NTC sensor tap output
13 +12/15VDC OUT P +12V @ 0,8A or +15V @ 0,6A +/-10% Positive regulated analog section supply (same as
pin 22)
14 -12/15VDC OUT P -12V @ 0,2A or -15V @ 0,2A +/-10% Negative regulated analog section supply (same as
pin 21)
15 MUTE PActive Low, To be pulled to GND
by current sink at least 2mA CH1-CH2-CH3-CH4 Output stage disable PWM
16 +VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Positive Monitor
17 -VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Negative Monitor
18 -VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Negative Monitor
19 +VCCMON P 20V/V 2V max 4,5kΩ Rail Bus Positive Monitor
20 MUTE PActive Low, To be pulled to GND
by current sink at least 2mA CH1-CH2-CH3-CH4 Output stage disable PWM
21 -12/15VDC OUT P -12V @ 0,2A or -15V @ 0,2A +/-10% Negative regulated analog section supply (same as
pin 21)
22 +12/15VDC OUT P +12V @ 0,8A or +15V @ 0,6A +/-10% Positive regulated analog section supply (same as
pin 22)
23 TEMPMON P0-5V TBD 1kΩ NTC sensor tap output
24 IOUT4MON P8,35A/V 4,7kΩ Channel 4 Output Current
Monitor
25 PROTECT 34 P Level 1 (4.5V to 5V) not in protection. Level 0 (0V to 0.5V) in
Protection 4,7kΩ Channel 3 & Channel 4
Output Stage Protection
Monitor
26 VOUT4MON P20V/V 4,5kΩ Channel 4 Output Voltage
Monitor
27 GND PGround
28 IN 4 - P Unbalanced: 1,41Vrms for full
output. 8Vrms absolute max input. 4,7kΩ Channel 4 Negative
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 3,1kΩ
29 IN 4 + P Unbalanced: 1,41Vrms for full output shorting pin 7 to GND.
8Vrms absolute max input. 9,4kΩ Channel 4 Positive
Balanced input. 26dB Input
to Output Overall Gain
Balanced: 0,705Vrms for full
output. 8Vrms absolute max input. 9,4kΩ

Connections | 9
11:3.LED encoding
A single LED is located on the point indicated in the picture.
Pin# Name IN OUT POWER Range Scale Factor Impedance Tolerance Description
30 GND PGround
31 +5VDC OUT P+5Vdc out 20mA max current
available +/-5%
32 RESERVED
33 READY 34 POpen Collector, high when output
stage is operative TBD TBD
34 SDPWS PActive High, Logic input 3,3 to
12Vdc 1kΩ Powers Supply Shut Down
11:2.4.PL1001, PL2001 pinout
1
6
PL1001 pinout (B6P-VH JST)
Pin# Symbol Polarity Description
1GND -Channel 1 Negative
2HOT +Channel 1 Positive
3GND -Channel 3 Negative
4HOT +Channel 3 Positive
5GND Parallel Ground
6Signal Parallel Signal
PL2001 pinout (B6P-VH JST)
Pin# Symbol Polarity Description
1GND +Channel 2 Positive
2HOT -Channel 2 Negative
3GND +Channel 4 Positive
4HOT -Channel 4 Negative
5GND Parallel Ground
6Signal Parallel Signal
Priority Status Description
Steady ON Everything Good
1o1 pulse (100ms ON 200ms OFF) PGOOD not good
5o2 pulses (100ms ON 200ms OFF) Output stage temperature too high
4o3 pulses (100ms ON 200ms OFF) transformer temperature too high
6o4 pulses (100ms ON 200ms OFF) high frequency protection
2o5 pulses (100ms ON 200ms OFF) transformer NTC broken
3o6 pulses (100ms ON 200ms OFF) output stage NTC broken
Loudspeaker wires
housing: JST VHR-6N

10 | MiniMod 4 | User guide
11:4.Internal Signal Path Polarity
In order to increase the power’s supply energy storage
efciency, signals coming from channel pairs 1-2 are polar-
ity reversed, one with respect to the other within the pair,
when entering the amplier. This ensures a symmetrical use
of the voltage rails: if, for example, both channels 1 and 2
input signals are going through a peak at the same time,
channel 1’s energy will come from the positive voltage rails
while channel 2, whose polarity is reversed with respect to
channel 1, will be fed energy from the negative voltage rails.
In this manner, the power supply will work symmetrically,
with one channel driven by the positive rails and the other
by the symmetrical negative rails. Channel 2’s signal will be
polarity reversed once more to ensure that both channels
output with the same polarity as their corresponding input
signals.
For this reason it is very important not to invert the po-
larity of either channels before feeding them to the module.
A double polarity inversion (the rst by the user inserting
the input signal and the other by the amplier’s internal
circuitry) results in no inversion at all. If this were the case,
both channels would be weighting on only one side (positive
or negative) of the power supply’s voltage rails. This would
result in an inefcient use of the power supply’s energy.
Please pay special attention in using balanced inputs on
all measurement equipment (such as oscilloscope probes)
when you are bench testing.
11:5.Output Configuration
MiniMod 4 can be congured in 5 different output type
of connections:
4 x SE (Single Ended): 4 indipendent channels.
2 x BTL (Bridge Tied Load): Two couples of channels
bridged.
2 x SE + 1 x BTL: A couple of channel bridged while the
remaing two channels kept single ended.
2 x PTL (Parallel Tied Load); Two couple of channels
obtained by paralleling two channels of the module. This
conguration can be activated by short circuiting two pins
of output connector indicated on FIGURE X, it must be
done before switching on the module.
Activating the parallel mode on one of the output
connectors, implies setting up parallel mode on both
channel pairs. For safety reasons we suggest to apply the
parallel mode on both connectors.
1 x PBTL (Parallel Bridge Tied Load): A single channel
can be obtaned by bridging the PTL conguration.
GND
Parallel
-
+
-
+
GND
Parallel
+
-
+
-
CH1
CH3
CH2
CH4
Parallel
Parallel
4 x 150 W @ 4 Ω
GND
Parallel
-
+
-
+
GND
Parallel
+
-
+
-
CH1
CH3
CH2
CH4
Parallel
Parallel
2 x 300 W @ 8 Ω BTL
GND
Parallel
-
+
-
+
GND
Parallel
+
-
+
-
CH1
CH3
CH2
CH4
Parallel
Parallel
2 x 150 W @ 4 Ω
1 x 300 W @ 8 Ω BTL
GND
Parallel
-
+
-
+
GND
Parallel
+
-
+
-
CH1
CH3
CH2
CH4
Parallel
Parallel
2 x 300 W @ 2 Ω PTL
GND
Parallel
-
+
-
+
GND
Parallel
+
-
+
-
CH1
CH3
CH2
CH4
Parallel
Parallel
1 x 600 W @ 4 Ω PBTL
 4 x 150 W @ 4 Ω SE
 2 x 300 W @ 8 Ω BTL
 2 x 150 W @ 4 Ω SE + 1 x 300 W @ 8 Ω PBTL
OUT 1
OUT 2
OUT 3
OUT 3
OUT 1+2
OUT 3+4
OUT 1
OUT 2
OUT 3+4
FIGURE 7: Internal signal path polar-
ity with example input signals. Both channels
1 and 2 are fed with the same sine signal.
rst polarity
inversion
second polarity
inversion
Channel 1
input
Channel 2
input
Channel 1
output
Amp
Channel 2
output
1/2
3/4
rst polarity
inversion
second polarity
inversion
Channel 1
input
Channel 2
input
Channel 1
output
Amp
Channel 2
output
1/2
3/4
1
2
3
4