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Kappa Four
4 CHANNEL POWER AMPLIFIER
SERVICE MANUAL
Infinity Systems Incorporated
250 Crossways Park Dr.
Woodbury, New York 11797
Rev0 2/2009
Released 2009
Discontinued XXXX
KAPPA FOUR
- CONTENTS -
SPECIFICATIONS ...............................................1
PACKAGING........................................................2
CONTROL/INSTALLATION INSTRUCTIONS..............3
CONTROL/INSTALLATION DRAWINGS...................4
BASIC TROUBLESHOOTING.................................5
EXPLODED VIEW/PARTS LIST...............................6
DISASSEMBLY INSTRUCTIONS.............................7
AMPLIFIER BLOCK DIAGRAM...............................8
ELECTRICAL PARTS LIST ....................................9
P.C.B. DRAWINGS..............................................14
IC/TRANSISTOR PINOUTS...................................27
SCHEMATICS.....................................................32
Kappa Four Specifications
Output Power: 125W RMS x 4 channels @ 4 ohms; 1% THD + N
(14.4V supply) 150W RMS x 4 channels @ 2 ohms; 1% THD + N
Total Peak Power 1200W
Signal-to-noise ratio: 85dBA (reference 1W into 4 ohms)
106dBA (reference rated power into 4 ohms)
Frequency response: 10Hz 75kHz (3dB)
THD+N 1KHz LPF=22KHz 0.05% (rated power @ 4 ohms)
Output Regulation 0.03dB @ 4 ohms
Input Impedance >20K ohms
Maximum input signal: 6.0V
Maximum sensitivity: 200mV
Bass Boost @ 50Hz 0-12dB
Channel Separation 50dB
DC Offset <30mV
Idle Current @ 4 ohms 2.0A
Max Current Draw 80A
Remote Operating Voltages ON 5V OFF 4V
Turn On Delay Time (sec) 2-3
Circuit Protection Temperature (75C), Short circuit, over/under voltage
Operating voltage range (8-16V)
Dimensions: 13"x7"x1.7"(329xmm x179 mm x43.3mm)
Fuses: (2) x 40A
Infinity Systems continually strives to update and improve existing products, as well as create new ones. The
specifications and details in this and related JBL publications are therefore subject to change without notice.
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KAPPA FOUR
2
KAPPA FOUR
Installation Warnings and Tips 3a 4 AWG Adapter E Rear Channel-Assignment Switch
· Disconnect the negative () lead from your vehicle's battery. · For power wire longer than 4' (1.2m), 4 AWG wire is · Determines the routing of the input signal for the RCA.
· At the installation sites, locate and make a note of all fuel recommended. Use the adapter to make the connection · LEFT: Sends the input signal from the left input
lines, hydraulic brake lines, vacuum lines and electrical according to the illustration below. to both rear amplifier channels. Useful if you are
wiring. Use extreme caution when cutting or drilling in bridging the amplifier to drive only two speakers.
and around these areas. · STEREO: Sends the signals from the left input to
· Choose a safe mounting location away from moisture. the left rear output channel and the signal from
· Make sure there is sufficient air circulation at the mounting the right input to the right rear output channel.
location for the amplifier to cool itself. (This is typical operation mode.)
· Mount the amplifier, using the supplied hardware. · RIGHT: Sends the input signal from the right input
to both rear output channels. Useful if you are
Specifications bridging the amplifier to drive only two speakers.
· 125W RMS x 4 channels @ 4 ohms <1% THD + N* F Front Channel-Assignment Switch
· 150W RMS x 4 channels @ 2 ohms <1% THD + N* · Determines the routing of the input signal for the RCA.
· Total peak power: 1200W · LEFT: Sends the input signal from the left input
· Frequency response: 10 to 75kHz (-3dB) to both front amplifier channels. Useful if you are
3 Protect LED
bridging the amplifier to drive only two speakers.
· Maximum input signal: 6V* · Illuminated under any of the following fault conditions:
· STEREO: Sends the signals from the left input to
· Maximum sensitivity: 200mV* battery over/under voltage, short circuit in speaker
the left front output channel and the signal from
· THD + N: 0.05% wires, amplifier is too hot, amplifier's output circuit has
the right input to the right rear output channel.
· Signal-to-noise ratio: 85dBA (reference to 1 watt) failed (DC voltage present in the amplifier's output).
(This is typical operation mode.)
· Signal-to-noise ratio: 106dBA (reference to rated power) 4 Power-On LEDs
· RIGHT: Sends the input signal from the right input to
* CEA-2006A-compliant · Illuminated when the amplifier is on.
both front output channels. Useful if you are bridging
5 Rear Input-Level Control
the amplifier to drive only two speakers.
0 Speaker Output Connectors · Used to match the rear input level of the amplifier
to the output level of the source unit. G Input Assignment Switch
· Connect the speakers to these terminals, observing
· See I for adjustment procedure. · FRT: Sends the RCA front stereo signal to the
proper polarity. Gold screws indicate +, and silver
6 Bass-Boost Control amplifier's inputs.
screws indicate .
· Add as much as 12dB of boost at 50Hz to the rear · REAR: Sends the RCA rear stereo signal to the
· Four-channel operation: Connect the front left
speakers by turning this control clockwise. Adjust amplifier's inputs.
speaker to the Front L+ and L terminals, and
according to personel preference. · SUB: DO NOT USE
the front right speaker to the Front R+ and
R terminals. Repeat for the rear speakers, 7 Rear Crossover-Frequency Control H Front Input Connectors (RCA)
using the Rear L+ and L terminals, and the · 12dB/Octave crossover, variable from 32Hz to 320Hz. · Connect to front RCA outputs from the source unit
Rear R+ and R terminals. See J for the adjustment procedure. or signal processor.
· Three-channel operation: Connect the stereo speakers 8 Rear Crossover-Filter Selector I Setting Gain (Input Level)
to the Front terminals, as above. Connect the single · LP: Select for subwoofer(s) or to provide a low-pass A Turn all Gain controls counterclockwise to
speaker into which the amplifier's rear channels will filter for separate mid-bass speakers.The subsonic MIN (minimum).
be bridged to the Rear terminals marked "B." filter will provide a high-pass filter for separate B With a dynamic music track playing, turn the
· Two-channel (bridged) operation: Connect one mid-bass speakers. head unit's volume control to the 3/4 position.
speaker to the Front terminals marked "B." Connect · FULL: Select for full-range speakers when no C Turn Front Gain control clockwise until the music
the other speaker to the Rear terminals marked "B." subwoofer will be used in the system. is so loud that it no longer sounds clear (distortion
· HP: Select for midrange speakers or full-range is present in the output).
· Minimum speaker impedance for stereo operation
speakers when a subwoofer is used in the system. D Turn Front Gain control counterclockwise gradually,
is 2 ohms. Minimum speaker impedance for bridged
9 Front Input-Level Control just until the music sounds clear, once again.
operation is 4 ohms.
· Used to match the front input level of the amplifier E Front Gain is now adjusted correctly.
1 Fuses
to the output level of the source unit. F Adjust Rear Gain control so that the level of the rear
· Replace only with the same type and rating.
speakers is proportionate to the level of the front
2 Power Input Connectors · See I for adjustment procedure.
speakers, according to your preference.
· +12V: Connect to the positive terminal of the vehicle's A Front Crossover-Filter Switch
J Setting the Crossover
battery. Install an appropriate fuse holder and fuse · LP: Select for subwoofer(s).
A Crossover setting for 5" or larger full-range speakers
(120A minimum) within 18" (457mm) of the battery. · FLAT: Select for full-range speakers when no when no subwoofer is included in the system.
Make sure the wire is not damaged or pinched during subwoofer will be used in the system. B Crossover setting for full-range speakers
installation. Install protective grommets when routing · HP: Select for midrange speakers or full-range when a subwoofer is included in the system.
wires through the firewall or other sheet metal. speakers when a subwoofer is used in the system. C Crossover setting for subwoofers.
· GND: Connect to the vehicle's chassis. Refer to the B Front Crossover-Frequency Control D Crossover setting for separate mid-bass speakers
illustration below. · 12dB/Octave crossover, variable from 32Hz to 320Hz. driven by channels that include a Subsonic Filter
Factory Bolt Ring Connector See J for the adjustment procedure. Control.
Ground Wire C Rear Input Connectors (RCA) Note: Acceptable frequency ranges indicated in gray.
· Connect to rear RCA outputs from the source unit,
or signal processor.
D Input Assignment Switch
· FRT: Sends the RCA front stereo signal to the
amplifier's inputs.
· REAR: Sends the RCA rear stereo signal to the
amplifier's inputs.
Note: Remove any paint Star Washer
below ring connector. · SUB: DO NOT USE
· REM: Connect to the "Remote Out" lead from the source
This product is designed for mobile applications and is not intended
unit or to a source of switched +12V (ACC). for connection to the mains.
A valid serial number is required for warranty coverage.
Features, specifications and appearance are subject to change
without notice.
3
KAPPA FOUR
4x 2x
3x 1x
1x
3a
3 4
2 1 0
B B
L R
B B
L R
C D E F G H
KAPPA FOUR
I
A B C D E F
5 7
6 8
J
A A B C D
9 B
4
KAPPA FOUR
Amplifier Troubleshooting Guide
1. Status LED on Amplifier not Lit - Head Unit (Source) Turned ON
Verify:
A. Remote turn-on wire from source to amplifier has proper voltage
B. Power (B+) connections at amplifier, terminal blocks, and battery are secure
C. Ground (GND) connections at amplifier and vehicle chassis are secure
D. Battery B+ fuse (if used) is OK
E. Amplifier fuse is OK
F. B+ at battery and B+ at amplifier has proper voltage
2. Status LED's Lit, No Output from Speakers in Normal Operating Condition
Verify:
A. RCA cables from amplifier to source are securely connected
B. Volume adjustment on amplifier is correctly adjusted
C. Source is ON and playing
3. Engine Noise From Speaker(s)
Turn source OFF, Disconnect RCA cables at amplifier. If noise stops, check equipment & cables leading
to amplifier.
Verify:
A. RCA cables are of good quality with no breakage to internal shields
B. RCA cables from source to amplifier are not run alongside any power cables
4. Amplifier Output Distorted Music
Verify:
A. Source output music to amplifier is not distorted
B. Source output sensitivity is correctly adjusted
5. Amplifier Shuts Down, Green LED's are Lit - Amplifier is in Thermal Protection Mode
Verify:
A. Amplifier is mounted with adequate air circulation around heatsinks or vents
B. Amplifier is not mounted under carpet or sealed enclosure
C. Speakers meet correct impedance for application (mono or stereo hookup)
6. Amplifier Does Not Turn ON, and Red LED is Lit Amplifier (and not Connected to a Shorted Speaker)
Verify:
A. Speaker crossover (if used) is not defective
5
KAPPA FOUR
6
KAPPA FOUR DISASSEMBLY INSTRUCTIONS
NOTE keep track and separate any and all screws; they are dissimilar.
For examination:
1) Remove the two screws at opposite ends on the bottom of the heatsink.
2) Remove the end panel on the Input side only, four Phillips screws.
3) Slide both pieces of silver trim off the heatsink.
4) Remove the top cover; it will be attached with a cable so unplug at Molex connector CN1
For most component repairs on the MAIN PCB, the entire PCB must be removed from the heatsink.
Note the output MOSFETS are an exception; skip to steps 1-4 below.
5) Remove the Output end panel, five Phillips screws.
6) Remove the terminal screws to the Power connections, and top row only of the speaker
terminals.
7) Remove the remaining three Phillips screws on the bottom of the heatsink. There is a nut which
may spin on the machine screw; look at the top of the PCB.
8) Remove all Phillips screws holding the Aluminum transistor clamps on; remove the clamps.
9) Remove the Amplifier PCB; seven Philips screws. The PCB will then pull straight up and off the
MAIN PCB.
10) Remove the single Phillips screws holding the 2 terminal Temp. switch in place.
11) Slide the complete PCB out of the heatsink channel.
Access to the (16) output MOSFETS Q2- Q6, Q3A, Q4A, Q5A, Q6A ,Q8-Q14:
1) Follow steps #1-4, and 6, above.
2) Follow step #8 above to remove the Amplifier PCB
3) Remove the gray heatsink from the PCB by grasping and pulling it straight out it is only held on by
friction from the white heatsink compound.
4) The (16) output MOSFETS are underneath the rectangular insulator on the PCB.
7
1 2 3 4 5 6 7 8
KAPPA FOUR
MODEL RLEQ
MODEL FLEQ VARIABLE LP 20955 PCB
BALANCED 2ohm/4ohm
VARIABLE LP 20955 PCB 32HZ--320HZ/12dB RL
D BALANCED 2ohm/4ohm INPUT D
32HZ--320HZ/12dB FL BASS BOOST
INPUT INPUT RL UNIT
INPUT FL UNIT 50Hz
GAIN CONTROL
11 32 320 80K
GAIN CONTROL
11 32 320 80K OP OP AMP
OP OP AMP
SPEAKER
SPEAKER
BTL-4ohm
BTL-4ohm
SPEAKER
SPEAKER
MODEL RREQ
C MODEL FREQ VARIABLE LP 20955 PCB C
BALANCED 2ohm/4ohm
VARIABLE LP 20955 PCB 32HZ--320HZ/12dB RR
BALANCED 2ohm/4ohm INPUT
32HZ--320HZ/12dB FR BASS BOOST
INPUT INPUT RR UNIT
INPUT FR UNIT 50Hz
GAIN CONTROL
11 32 320 80K
GAIN CONTROL
11 32 320 80K OP OP OP AMP
OP OP OP AMP
SPEAKER
SPEAKER
B B
+VAMP1
+VOP
+
+VAMP2
Battery POWER SUPPLY
-VAMP2
-
-VOP
-VAMP1
A A
ECN NO. DESCRIPTION APPROVED DATE DWG NO:
PART NO:
PART NAME: SCALE: 2/4 DRAW BY: DATA:
BLOCK DIAGRAM UNIT: MM CHECKED BY: DATA:
PRODUCT MODE: SIZE: A2 APPROVED BY: DATA:
8 Kappa FOUR REV: 3.8 80618
1 2 3 4 5 6 7 8
KAPPA FOUR
KAPPA FOUR Electrical Parts List
Part Number Description Qty Reference Designator
Main PCB
Resistors
0704-4331-02 Resistor 1W 330 ±5% 15MM 1 R3R
0701-A100-02 Resistor SMD 10 1W ±5% 2512 1 R153P
0702-3100-02 Resistor 1/2W 10 ±5% 12.5MM 2 R152P R155P
0701-2100-03 Resistor SMD 10 1/8W ±1% 0805 2 R24P R25P
0712-4821-02 Resistor 1W 820 ±5% 10MM 1 R26P
R170P R171P R172P R173P R174P R175P
0701-2101-02 Resistor SMD 100 1/8W ±5% 0805 7
R37P
0701-5101-04 Resistor 100 +/-5% 2512 SMT 1 R180P
0701-2511-02 Resistor SMD R0805 510 1/8W ±5% 4 R140 R240 R340 R440
R707 R33P R101M R104P R105A R105B
R105C R105D R105P R114 R134 R137 R147
0701-2102-03 Resistor SMD 1K 1/8W ±1% 0805 28 R201M R214 R234 R236 R237 R301M R314
R334 R337 R347 R401M R414 R434 R436
R437
0701-2202-03 Resistor SMD 2K 1/8W ±1% 0805 2 R300P R301P
0701-2302-03 Resistor SMD 3K 1/8W ±1% 0805 4 R147A R236A R347A R436A
0701-2472-03 Resistor SMD 4.7K 1/8W ±1% 0805 6 R2M R5R R27P R30P R124P R154P
0701-2622-03 Resistor SMD 6.2K 1/8W ±1% 0805 4 R142 R242 R342 R442
0701-2682-03 Resistor SMD 6.8K 1/8W ±1% 0805 1 R14P
R705 R706 R1M R1R R3M R4R R21P R23P
R28P R29P R31P R32P R34P R36P R102
R103 R105 R106 R133 R135 R136 R146
0701-2103-03 Resistor SMD 10K 1/8W ±1% 0805 43 R149P R202 R203 R205 R206 R233 R235
R302 R303 R305 R306 R333 R335 R336
R346 R402 R403 R405 R406 R433 R435
0701-3103-02 Resistor SMD 10K 1/4W ±5% 1206 2 R206P R207P
0701-2183-03 Resistor SMD 18K 1/8W ±1% 0805 1 R20P
0701-2203-03 Resistor SMD 20K 1/8W ±1% 0805 1 R4M
R108 R208 R308 R408 R701 R101 R114A
0701-2223-03 Resistor SMD 22K 1/8W ±1% 0805 17 R114B R114C R114D R139 R201 R239 R301
R339 R401 R439
0701-2303-03 Resistor SMD 30K 1/8W ±1% 0805 1 R22P
0701-2333-03 Resistor SMD 33K 1/8W ±1% 0805 8 R141 R143 R241 R243 R341 R343 R441
0701-2473-03 Resistor SMD 47K 1/8W ±1% 0805 3 R2R R19P R158PP
0701-2563-03 Resistor SMD 56K 1/8W ±1% 0805 4 R15P R16P R17P R18P
R113 R101FA R101FB R101RA R101RB
0701-2104-03 Resistor SMD 100K 1/8W ±1% 0805 13 R102FA R102FB R102RB R102RA R129A
R129B R129C R129D
0701-2164-03 Resistor SMD 160K 1/8W ±1% 0805 4 R138 R238 R338 R438
0701-3100-02 Resistor SMD 10 1/4W ±5% 1206 1 R28
0701-1100-02 Resistor SMD 10 1/10W ±5% 0603 1 R27
0701-1102-02 Resistor SMD 1K 1/10W ±5% 0603 2 R40 R41
0701-1222-02 Resistor SMD 2.2K 1/10W ±5% 0603 1 R29
0701-1302-02 Resistor SMD 3K 1/10W ±5% 0603 1 R24
0701-1472-02 Resistor SMD 4.7K 1/10W ±5% 0603 2 R21 R35
0701-1153-02 Resistor SMD 15K 1/10W ±5% 0603 2 R25 R19
0701-1223-02 Resistor SMD 22K 1/10W ±5% 0603 1 R37
0701-1473-02 Resistor SMD 47K 1/10W ±5% 0603 1 R30
0701-1104-02 Resistor SMD 100K 1/10W ±5% 0603 2 R36 R13
0701-1103-02 Resistor SMD 10K 1/10W ±5% 0603 6 R10 R14 R22 R23 R31 R33
0701-1562-02 Resistor SMD 5.6K 1/10W ±5% 0603 1 R26
070125K11003 Resistor SMD 5.11K 1/8W ±1% 0805 4 R144 R244 R344 R444
0701-2221-02 Resistor SMD 220 1/8W ±5% 0805 1 R1
0704-4331-02 Resistor 1W 330 ±5% 15MM 1 R3R
0702-3100-02 Resistor 1/2W 10 ±5% 12.5MM 2 R152P R155P
0712-4821-02 Resistor 1W 820 ±5% 10MM 1 R26P
R109 R110 R209 R210 R309 R310 R409
0701-2133-02 Resistor SMD 1/8W 13K ±5% 0805 10
R410 R702 R703
9
KAPPA FOUR
Main PCB
Semiconductors
2202-1602-05 Dual Diode DIP UF1602CT AKA 16/200V TO-220 1 D117P
2202-20RG-05 Dual Diode DIP MUR1620CTA 16A/200V TO-220 ON SEMI 1 D120P
04ZL-4007-03 Diode DIP 1N4007 DO-41 1 D1R
04ZL-6A10-00 Diode DIP 6A10 1000V 1 D1
04GS-R104-00 Diode DIP FR104 1A 400V 52MM 5 D101P D201P D301P D401P D501
D6 D2R D5P D7P D101 D102 D103 D201
04PT-4148-01 Diode SMD 1N4148 DO-213AA 20 D202 D203 D301 D302 D303 D401 D402
D403 D7 D8 D9 D10
04WY-12BV101 Diode SMD 12V DO-213AA 0.5W 4 ZD101 ZD201 ZD301 ZD401
04WY-15BV101 Diode SMD 15V DO-213AA 0.5W 6 ZD100P ZD101P ZD103P ZD1P ZD2P ZD3P
04WY-39AV101 Diode SMD 3.9V DO-213AA 0.5W 1 ZD1
04WY-24BV-01 Diode SMD 24V DC-213AA 0.5W 1 ZD102P
04ZL-4007-03 Diode DIP 1N4007 DO-41 1 D1R
04GS-R104-00 Diode DIP FR104 1A 400V 52MM 5 D101P D201P D301P D401P D501
0100-9L05-03 Regulator 79L05 TO-92 -5V/100MA 1 U106P
01FA-7812-04 Regulator KA7812E TO-220 FAIRCHILD +12V 1 U102P
01TI-L072-09 Dual Op-amp SMD TL072 SO-8 2 U104 U204
U301 U99A U99B U101 U103A U105A U201
01JR-4560-08 Dual Op-amp SMD 4560 SOP-8 JRC 8
U303A
0100-NE55-08 Timer SMD NE555 SOP-8 TI 1 U1P
01TI-L494-09 PWM SMD TL494C SO-16 1 U1
M101 M201 M301 M401 Q101M Q201M
03T1-K117-01 N chan FET 2SK117 TO-92 8
Q301M Q401M
03T1-Z48V-02 MOS FET IRFZ 48V TO-220 6 Q113P Q114P Q115P Q117P Q118P Q119P
2601-P817-00 photocoupler PC817 DIP4 1 U2P
03N1-1815-04 transistor SMD 2SC1815 SOT-23 NPN 5 Q4 Q3 Q5P Q6P Q7P
03N1-P31C-02 transistor TIP31C TO-220 NPN 1 Q121P
03T2-7805-01 Regulator 78L05 TO-92 +5V/100MA 1 U107P
03P1-A940-02 transistor 2SA940 PNP TO-220 1 Q301P
03N1-2073-02 transistor 2SC2073 NPN TO-220 1 Q300P
03P1-5401-04 transistor SMD MMBT5401LT1 PNP SOT-23 5 Q5 Q6 Q2M Q12P Q108P
03N1-5551-04 transistor SMD MMBT5551LT1 NPN SOT-23 9 Q10 Q9 Q1M Q1R Q2R Q8P Q9P Q10P Q11P
03P1-1015-04 transistor SMD 2SA1015 SOT-23 PNP 2 Q1 Q2
Capacitors
105/160V
06D1C105G701 Capacitor 3 C115 C116 C100PB
±10%CBB11.5*8.5*15.5MM,10.5MM,brown
06D201066000 E-cap 10uF/50V ±20% 6.3*7 105 2.5MM 4 C110 C210 C310 C410
C107 C108 C207 C208 C307 C308 C407
C408 C702 C703 C114 C214 C314 C414
06D211066105 E-cap 10uF/50V ±20% 5*7 105 2MM 30 C102 C103 C202 C203 C302 C303 C402
C403 C106A C106B C106C C106D C155P
C157P C300P C301P
06D211076001 E-cap 100UF/50V ±20% 8*12 105 5mm 5 C10P C9P C14P C153P C1R
06D212256301 E-cap 2.2UF/50V ±20% 5*11 105 5mm 3 C23 C24 C18P
06D212264103 E-cap 220uF/25V ±20% 8*12 105 black 5MM 6 C27 C156P C158P C175P C176P C4P
06D212273100 E-cap 220UF/16V ±20% 6.3*7 2 C175PB C176PB
06D212274001 Capacitor 220UF/25V ±20% 8*16 105 5mm 4 C101 C201 C301 C401
06D213386022 E-cap 3300UF/50V ±20% 22*25MM 105 10MM Low ESR 2 C162P C163P
06D214766001 E-cap 47UF/50V ±20% 6.3*11mm 105 5mm 4 C100PA C101PB C154P C17P
06D214779012 E-cap 470UF/63V ±20% 13*20MM 105 5MM Low ESR 2 C160P C161P
4700UF/25V ±20% 16*28MM 105 Low ESR
06D214784016 E-cap 2 C137P C137PA
Highness28MM
06S111046002 Capacitor SMD 104/50V ±10% X7R 0603 10 C16 C22 C5 C21 C19 C17 C12 C7 C6 C20
06S121034000 Capacitor SMD 0.01uF/50V 0805 X7R ±10% 5 C11P C100 C200 C300 C400
C4 C5P C6P C7P C8 C8P C9 C111P C112P
06S121047001 Capacitor SMD 104/100V ±10% X7R 0805 TDK 17 C113P C122P C129PB C130PB C131PB
C140P C132 C132PB
06S122226000 Capacitor SMD 2200pF/50V 0805 X7R ±10% 2 C12P C13P
06S124727000 Capacitor SMD 472/100V 0805 X7R ±10% 4 C116A C116B C116C C116D
06S126816000 Capacitor SMD 680PF/50V ±10% X7R 0805 1 C112PA
C1 C2 C15P C16P C103P C103PA C105P
06S13104C001 Capacitor SMD 104/250V ±10% X7R 1206 TDK 9
C132P C133P
10
KAPPA FOUR
Main PCB
06S321006000 Capacitor SMD 10pF/50V 0805 NPO ±5% 5 C704 C104 C204 C304 C404
C112 C212 C312 C412 C705 C706 C707
06S322206000 Capacitor SMD 22pF/50V 0805 NPO ±5% 23 C105 C106 C109 C111 C205 C206 C209
C211 C305 C306 C309 C311 C405 C406
06S331026000 Capacitor SMD 1000pF/50V 0603 NPO ±5% 1 C26
Miscellaneous
2901-SDC2-00 Relay DIP 6PIN 8A/250VAC modelHCP2-S-DC24V-A 2 RLY1 RLY2
1505-0609-01 pin holder DIP double 2*6P PITCH2.54MM*2.54MM 1 CON1A
1404-0027-02 RCA Jack Dual AV2-8.4-38 2 RCA1 RCA2
1001-1301-10 inductor 28*12MM(1.0*6P)*2+1.0*1PK5A 13UH 7.5UH 1 L101P
1001-3003-10 inductor DIP 0.8*3P K6A 13*6 30UH 2 L102P L105P
1001-3004-10 inductor 0.65*4P K6A 13*6 30UH 2 L101 L301
1001-4501-10 inductor 0.9*4P K6A 16*6 45UH 2 L1 L2
1333-0206-00 slide switch SK-23DO7AG6 SW2P3T-SD REAR,STEREO,RIGHT,LEFT 4 SW101F SW101R SW102F SW102R
1380-0216-00 temperature switch DIP 77 ±2 TO-220 1 T-SW
1400-0001-16 RJ45 Jack DIP 16PIN RJ45 10P16C IMS INPUT 1 RJ45
1500-0812-B1 terminal 8P modelJSZ8-26A with silkscreen 1 J1-A
1501-0300-04 terminal DIP JS23A-25A 3PIN 1 J102P
1501-0300-05 terminal 3P JSZ3-83 180° 1 accessory
1501-0309-05 bend pin DIP PITCH 2.54mm 3PIN 90° 1 J2E
1501-0404-00 socket DIP Pitch 2.0MM 4PIN 1 CN1
1501-0409-02 bend pin DIP PITCH 2.54mm 4PIN 90° 2 J2D J2F
1501-0609-03 pin holder 6PIN 8MM 2.55MM PITCH:2.54MM 3.2MM 3 CON1 CON2 CON6B
1501-1209-08 pin holder DIP single 12P PITCH2.54MM 2 CON4A CON2A
1505-0609-01 pin holder DIP double 2*6P PITCH2.54MM*2.54MM 1 CON1A
1601-403G-01 fuse DIP 40A/32V withstand high temperature UL Littelfuse 2 F101P
1401-0008-00 fuse holder DIP 2PIN BXS2-09 1 for F101P
2100-0053-04 wire DIP 4PIN 2.1 UL1571 28AWG L=95MM 1
24D1-0055191 ground line 1015#18AWG L=55MM 4.2 ground terminal black 2 SH1 SH2
40 4.5:12.5:6 L1=L2=0.8*8 4.5TS L3=L4=0.8*4
3000-KAPP-01 HF transformer 1 T100P
12.5TS L5=L6=1.0*1 6TS
Control/Preamp PCB
Resistors
R109C R109D R108A R109A R109B R108B
0701-2512-02 Resistor SMD 5.1K 1/8W ±5% 0805 10
R108C R108D R127C R127D
0701-2682-03 Resistor SMD 6.8K 1/8W ±1% 0805 4 R104D R104C R104A R104B
R110B R110A R100C R100D R102C R102D
0701-2103-03 Resistor SMD 10K 1/8W ±1% 0805 16 R103C R103D R100A R103A R102B R103B
R100B R102A R114C R114D
0701-2000-02 Resistor SMD 0 1/8W ±5% 0805 2 R113C R113D
0701-2621-02 Resistor SMD 620 1/8W ±5% 0805 4 R101C R101D R101B R101A
0701-2102-03 Resistor SMD 1K 1/8W ±1% 0805 4 R112C R112D R111C R111D
0701-2472-03 Resistor SMD 4.7K 1/8W ±1% 0805 4 RA105D RA105B RA105A RA105C
0701-2203-03 Resistor SMD 20K 1/8W ±1% 0805 2 R125C R125D
0701-2223-03 Resistor SMD 22K 1/8W ±1% 0805 4 R107D R107C R107B R107A
0701-2473-03 Resistor SMD 47K 1/8W ±1% 0805 2 R110C R110D
0701-2105-02 Resistor SMD 1M 1/8W ±5% 0805 2 R126C R126D
0701-1272-04 Resistor SMD 2.7K 1/8W ±1% 0805 4 R106C R106D R106A R106B
1204-2031-33 Variable Resistor B20K L=20 ±10% INPUT, BASS BOOST 3 VR100A VR100C VR100R
1204-5031-37 Variable Resistor C50K L=20 ±10% FREQUENCY 2 VR101A VR101C
Semiconductors
01JR-4560-08 Dual Op-amp SMD 4560 SOP-8 JRC 6 U100C U100A U100D U100B U100R U101R
01ST-L074-08 Quad Op-amp SMD TL074 SOP-14 2 U101A U101C
Capacitors
06D341047400 Capacitor 104/100V ±5% yellow 5MM 2 C115C C115D
06D341837400 Capacitor (BOX)183/100V yellow ±5% 5MM 2 C116C C116D
11
KAPPA FOUR
Control/Preamp PCB
C101C C101A C101B C101D C110A C110B
06D211066109 E-cap 10uF/50V ±20% 5*11 105 black 5MM 8
C110C C110D
06S323306000 Capacitor SMD 33PF/50V 0805 NPO ±5% 4 C102C C102D C102B C102A
06S124706000 Capacitor SMD 47PF/50V ±10% C0805 4 C103C C103D C103A C103B
06S321016000 Capacitor SMD 100pF/50V 0805 NPO ±5% 2 C117C C117D
C104A C104B C104C C104D C105A C105B
06S121046000 Capacitor SMD 0.1uF/50V 0805 X7R ±10% 8
C105C C105D
Miscellaneous
1501-0609-0B PIN single 6P 180° 6.0*2.54*3.0MM 3 CON4 CON5 CON6
1333-0211-00 slide switch SS-23D6*6.5*217MM 2P3T HPF/FULL/LPF 2 SW100C SW100A
Amplifier PCB
Resistors
0704-64R7-02 Resistor 2W 4.7 ±5% 4 R122A R122B R122C R122D
0701-2000-02 Resistor SMD 0 1/8W ±5% 0805 4 R31 R32 R52 R69
R14 R62 R117A R117B R13 R42 R118A
0701-24R7-02 Resistor SMD 4.7 1/8W ±5% 0805 8
R118B
R16 R27 R27A R28 R28A R29 R29A R30
0701-2100-02 Resistor SMD 10 1/8W ±5% 0805 20 R30A R48 R49 R50 R51 R63 R65 R66 R67
R68 R15 R46
07012511Z003 Resistor SMD 511 1/8W 0805 ±1% 4 R121A R121B R121C R121D
RP1 R112A R112B R128A R128B R112C
0701-2102-02 Resistor SMD 1K 1/8W ±5% 0805 9
R112D R128C R128D
0701-3102-02 Resistor SMD 1K 1/4W ±5% 1206 4 R113A R113B R113C R113D
0701-2202-02 Resistor SMD R0805 2K 1/8W ±5% 1 R33
0701-2222-02 Resistor SMD 2.2K 1/8W ±5% 0805 1 RA149P
0701-2272-02 Resistor SMD 2.7K 1/8W ±5% 0805 4 R7 R34 R8 R56
0701-2822-02 Resistor SMD 8.2K 1/8W ±5% 0805 4 R2 R9 R10 R55
0701-2682-03 Resistor SMD 6.8K 1/8W ±1% 0805 8 R1 R5 R6 R54 R25 R26 R36 R59
0701-2103-02 Resistor SMD 10K 1/8W ±5% 0805 9 R21 R38 R41 R22 R60 R23 R24 R18 R58
0701-3103-02 Resistor SMD 10K 1/4W ±5% 1206 4 R3 R4 R17 R57
R19 R20 R47 R64 R120A R120B R120C
0701-2473-02 Resistor SMD 47K 1/8W ±5% 0805 8
R120D
0701-2104-02 Resistor SMD 100K 1/8W ±5% 0805 3 R35 R37 R39
0701-2332-02 Resistor SMD 3.3K 1/8W ±5% 0805 4 R12 R70 R11 R53
0701-2273-02 Resistor SMD 27K 1/8W ±5% 0805 4 R40 R44 R45 R61
0701-2222-04 Resistor SMD 2.2K 1/4W ±5% 1206 4 R123A R123B R123C R123D
Semiconductors
04PT-4148-01 Diode SMD 1N4148 DO-213AA 9 D1 D2 D9 D8 D10 D5 D6 D13 D14
04ZL-2512-00 Diode SMD MUR120 1A 2512 4 D4 D12 D3 D11
03P1-5401-04 transistor SMD MMBT5401LT1 PNP SOT-23 1 Q1
03N1-5551-04 transistor SMD MMBT5551LT1 NPN SOT-23 1 Q7
Q2 Q3 Q3A Q4 Q4A Q5 Q5A Q6 Q6A Q8 Q9
03D1-6645-00 MOS FET IRF6645 16
Q10 Q11 Q12 Q13 Q14
0100-2095-00 IC IRS20955S Digital Audio Driver 4 U1 U2 U3 U4
01JR-4560-08 Dual Op-amp SMD 4560 SOP-8 JRC 2 U102A U102B
Capacitors
06D33221L000 Capacitor 221P/500V ±5% 4 C100A C100B C100C C100D
06D1C104C000 Capacitor 104/250V ±10% MAX13*4*9MM 10MM CBB21B 4 C114A C114B C114C C114D
06D1C474C000 Capacitor 474/250V ±10% MAX13*8*14MM 10MM CBB21B 4 C113A C113B C113C C113D
06D344747000 Capacitor 474/100V ±5% 5MM 1 C1B
06S121017000 Capacitor SMD 100PF/100V 0805 X7R ±10% 4 C11 C25 C12 C35
C110A C110B C111A C111B C110C C110D
06S321026000 Capacitor SMD 1000pF/50V 0805 NPO ±5% 8
C111C C111D
06S124736000 Capacitor SMD 0.047uF/50V 0805 X7R ±10% 2 C23 C21
C17 C18 C20 C27 C30 C37 C39 C6 C31 C41
06S121047001 Capacitor SMD 104/100V ±10% X7R 0805 TDK 17
C19 C1A C2A C3A C4A C5 C3B
12
KAPPA FOUR
Amplifier PCB
06S13104C001 Capacitor SMD 104/250V ±10% X7R 1206 TDK 8 C13 C14 C15 C16 C28 C29 C38 C40
C49 C1 C2 C9 C10 C22 C32 C33 C42 C108A
06S132256000 Capacitor SMD 2.2uF/50V 1206 X7R ±10% 13
C108B C108C C108D
06S131063000 Capacitor SMD 10UF/16V ±10% X5R 1206 4 C3 C26 C4 C36
06S432263000 Capacitor SMD 22uF/16V 1206 Y5V 80%/-20% 4 C7 C24 C8 C34
Miscellaneous
1001-180A-10 inductor DIP 18UH 15MM 12MM (Model:99AMF-132) 4 L100A L100B L100C L100D
1501-1209-07 PIN DIP single 12P 180 °, 6.0*14*4.0MM 2 CON4 CON2
1505-0209-00 PIN DIP double 2*6P 180°, 6.0*14*4.0MM 1 CON1
1004-0005-10 inductor W5 RH 3.5*8*0.8-2 1 L1
LED Board
2009-0001-00 LED SMD white with blue light 3.2*2.4*2.4 2 LED1 LED3
200A-0001-00 LED SMD white with red light 3.2*2.4*2.4 1 LED2
06S121046000 Capacitor SMD 0.1uF/50V 0805 X7R ±10% 2 C1 C2
13
KAPPA FOUR
14
KAPPA FOUR
15
KAPPA FOUR
16
KAPPA FOUR
17
KAPPA FOUR
18
KAPPA FOUR
19
KAPPA FOUR
20
KAPPA FOUR
21
KAPPA FOUR
22
KAPPA FOUR
23
KAPPA FOUR
24
KAPPA FOUR
25
KAPPA FOUR
26
KAPPA FOUR
Data Sheet No. PD60303
IRS20955(S)PbF
PROTECTED DIGITAL AUDIO DRIVER
Features Product Summary
· Floating PWM input enables easy half-bridge
implementation VOFFSET (max) ± 100 V
· Programmable bidirectional over-current protection Io+ 1.0 A
with self-reset function Gate driver
· Programmable preset deadtime for improved THD Io- 1.2 A
performances 15 ns, 25 ns,
Selectable deadtime
· High noise immunity 35 ns, 45ns
· ±100 V ratings deliver up to 500 W in output power Propagation delay 90 ns
· 3.3 V/5 V logic compatible input OC protection delay 500 ns (max)
· Operates up to 800 kHz Shutdown propagation
· RoHS compliant 250 ns (max)
delay
Description
The IRS20955 is a high voltage, high speed MOSFET driver
with a floating PWM input designed for Class D audio
amplifier applications.
Package
Bi-directional current sensing detects over-current
conditions during positive and negative load currents without
any external shunt resistors. A built-in protection control
block provides a secure protection sequence against over-
current conditions and a programmable reset timer.
The internal deadtime generation block enables accurate
gate switching and optimum deadtime setting for better
audio performance, such as lower THD and lower audio
noise floor.
Typical Connection
IRS20955 (S) +B
VDD CSH
CSD VB
IN HO
PWM VSS VS
Speaker
NC NC
VREF VCC
OCSET LO
(Please refer to Lead
Assignments for correct DT COM Vcc
pin configuration. This
diagram shows 12V
electrical connections
only)
-B
1
27
KAPPA FOUR
IRS20955(S)
Lead Definitions
Pin # Symbol Description
1 VDD Floating input positive supply
2 CSD Shutdown timing capacitor, referenced to VSS
3 IN PWM non-inverting input, in phase with HO
4 VSS Floating input supply return
5 NC
6 VREF 5 V reference output for setting OCSET
7 OCSET Low-side over-current threshold setting, referenced to COM
8 DT Input for programmable deadtime, referenced to COM
9 COM Low-side supply return
10 LO Low-side output
11 VCC Low-side logic supply
12 NC
13 VS High-side floating supply return
14 HO High-side output
15 VB High-side floating supply
16 CSH High-side over-current sensing input, referenced to VS
VDD 1 16 CSH
CSD 2 15 VB
3 14 HO
IRS20955(S)
IN
VSS 4 13 VS
NC 5 12 NC
VREF 6 11 VCC
OCSET 7 10 LO
DT 8 9 COM
IRS20955(S)
16-Lead SOIC (narrow body)
6
28
KAPPA FOUR
IRS20955(S)
Block Diagram
FLOATING INPUT CSH
UV
UV DETECT
VDD DETECT VB
UV
HIGH
Q
SIDE
INPUT CS
LOGIC HO
IN
20.4V
10.2V
HV
LEVEL VS
SHIFT HV HV
FLOATING HIGH SIDE
LEVEL LEVEL
VSS SHIFT SHIFT
5V REG VCC
UV
CHARGE/ DETECT
DISCHARGE
CSD
DEAD-TIME