Fortissimo-100 Güç Amplifikatörü

[guclusat]

Devamı ektedir.

Measurements

Power supply: laboratory power supply 2 x 40DC regulated + 2 x 10000 µF/50V close to K1

Input sensitivity 1.076 V (94 W/8 Ω, THD = 0.1 %, B = 22 kHz)

Input impedance 10 kΩ

Sine-wave power 94 W (8 Ω, THD = 0.1 %)
(1 kHz, B = 22kHz) 98 W (8 Ω, THD = 1 %)
181 W (4 Ω, THD = 0.1 %)
188 W (4 Ω, THD = 1 %)

Bandwidth 3.3 Hz…237 kHz (-3 dB, 1 W/8 Ω)
(generator 20 Ω) 10.8 Hz…78 kHz (-0.5 dB, 50 W/8 Ω)

Open loop bandwidth ≈ 20 kHz
Open loop gain ≈ 140000 (8 Ω load)

Slew rate 45 V/µs

Rise time 1.5 µs

Signal to noise ratio 103 dB (B = 22 Hz…22 kHz linear)
(Referred to 1 W/8 Ω) 106 dBA

Harmonic distortion plus noise 0.0008 % (1 kHz, 1 W, 8 Ω, B = 22 kHz)
0.0016 % (1 kHz, 1 W, 8 Ω, B = 80 kHz)
0.0016 % (20 kHz, 1 W, 8 Ω, B = 80 kHz)
0.0008 % (1 kHz, 50 W, 8 Ω, B = 22 kHz)
0.0008 % (1 kHz, 50 W, 8 Ω, B = 80 kHz)
0.002 % (20 kHz, 50 W, 8 Ω, B = 80 kHz)
0.0012 % (1 kHz, 1 W, 4 Ω, B = 22 kHz)
0.002 % (1 kHz, 1 W, 4 Ω, B = 80 kHz)
0.0025 % (20 kHz, 1 W, 4 Ω, B = 80 kHz)
0.0023 % (1 kHz, 100 W, 4 Ω, B = 22 kHz)
0.0023 % (1 kHz, 100 W, 4 Ω, B = 80 kHz)
0.0042 % (20 kHz, 100 W, 4 Ω, B = 80 kHz)

Intermodulation Distorsion 0.0012 % (1 W, 8 Ω)
(50 Hz : 7kHz = 4 : 1) 0.0015 % (50 W, 8 Ω)
0.0024 % (1 W, 4 Ω)
0.0041 % (100 W, 4 Ω)

Dynamic IM Distorsion 0.0016 % (1 W, 8 Ω)
(3.15 kHz square wave + 0.001 % (50 W, 8 Ω)
15 kHz sine wave) 0.0019 % (1 W, 4 Ω)
0.0021 % (100W, 4 Ω)

Damping factor 570 (1 kHz, 8 Ω)
(measured on K8/K9) 315 (20 kHz, 8 Ω)

Power supply detection 36.5 V off (slightly temperature dependent)
(positive supply only) 36.7 on (slightly temperature dependent)

DC protection +0.54 V/-0.89 V

Turn-on delay output relay 3.5 s

 

[guclusat]

DC voltages across several components of our prototype:
R7 7.90 V
R8 7.85 V
R13 7.90 V
R14 7.96 V
R19 1.06 V
R22 1.05 V
R27 1.2 V
R28 0.9 V
R33 1.2 V
R34 0.95 V
R25 1.006 V
R26 1.007 V
R39 0.28 V
R40 0.28 V
R41 0.28 V
R42 0.28 V
R55 18,7 mV amp cold
28,3 mV amp warmed up and no power

LEDs (average) = 1.675 V

Bill of materials
(PCB 210634-1 v1.1, schematic v1.2)

Resistor (small 0.6 W resistors are metalfilm)
R1,R74 = 1 MΩ, 1 %, 0.6 W
R2,R4 = 390 Ω, 1 %, 0.6 W
R3,R5,R20,R23,R64,R66,R69 = 10 kΩ, 1 %, 0.6 W
R6,R67 = 1 kΩ, 1 %, 0.6 W
R7,R8,R13,R14,R60,R61 = 3.3 kΩ, 1 %, 0.6 W
R9,R15,R27,R28,R33,R34 = 120 Ω, 1 %, 0.6 W
R10,R11,R16,R17 = 68 Ω, 1 %, 0.6 W
R12,R18 = 5.6 kΩ, 5 %, 1 W, metal film or metal oxide, body size 5 x 12 mm max.
R19,R22,R48,R49,R52,R53 = 220 Ω, 1 %, 0.6 W
R21,R24 = 33 Ω, 1 %, 0.6 W
R25,R26 = 56 Ω, 1 %, 0.6 W
R29,R30,R35 R36 = 27 Ω, 1 %, 0.6 W
R31,R37 = 1 Ω, 1 %, 0.6W
R32,R38 = 1.5 kΩ, 5 %, 1 W, metal film or metal oxide, 1 W, body size 5 x 12 mm max.
R39,R40,R41,R42 = 22 Ω, 1 %, 0.6 W
R43 = 6.8 kΩ, 5 %, 1 W, metal film or metal oxide, body size 5 x 12 mm max.
R44,R47 = 680 Ω, 5 %, 3 W, metal film or metal oxide, body size 5.5 x 16 mm max.
R45,R46 = 1 kΩ, 5 %, 2 W , metal film or metal oxide, body size 5 x 12 mm max.
R50,R51,R54,R55 = 0.22 Ω, 5 %, 5 W, metal plate, radial, lead spacing 9 mm, body size 5 x 14 mm, BPR58CR22J Koa
R56 = 4.7 Ω, 5 %, 2 W, metal film or metal oxide, body size 5 x 12 mm max.
R57 = 220 kΩ, 1 %, 0.6 W
R58,R59 = 2.2 MΩ, 1 %, 0.6 W
R62 = 1.2 kΩ, 1 %, 0.6 W
R63 = 270 Ω, 1 %, 0.6 W
R65,R70,R71 = 10 MΩ, 1 %, 0.6 W
R68 = 0 Ω, jumper wire
R72 = 3.3 MΩ, 1 %, 0.6 W
R73 = 100 kΩ, 1 %, 0.6 W
R75 = 150 kΩ, 1 %, 0.6 W
R76 = 10R, 5%, 2 W, metal film or metal oxide, body size 5 x 12 mm max.

Capacitor
C1 = 4.7 µF, 5 %, 50 VDC, pitch 5/7.5 mm, PET, body size 7.6 x 9.7 mm max.
C2 = 1.5 nF, 5 %, 100 VDC, pitch 5 mm, body size 2.5 x 7.2 mm max.
C3 = 10 pF, ±0.5 pF, 100 V, pitch 5 mm, C0G/NP0 (FG28C0G2A100DNT00 TDK)
C4,C5 = 1 nF, 5 %, 63 V, pitch 5 mm, PET, body size 2.5 x 7.2 mm max.
C6,C7,C8,C9 = 100 µF, 20 %, 16 V, D 6.3 mm, preferably 105°C
C10,C11 = 220 pF, 5 %, 100 V, pitch 5 mm, C0G/NP0, body size 2.5 x 7.2 mm max.
C12 = 100 pF, 5 %, 100 V, pitch 5 mm, PP, body size 4.5 x 7.2 mm max.
C13,C14,C18,C19,C29 = 100 nF, 5 %, 100 VDC, pitch 5 mm, PET, body size 2.5 x 7.2 mm max.
C15,C16 = 680 µF, 20 %, 35 V, D 12.5 mm, pitch 5 mm, 5000h@105°C (35ZL680MEFC12.5X20 Rubycon)
C17 = 100 nF, 5 %, 160 VDC, pitch 5 mm, PP, body size, 5 x 7.2 mm max. (R79GC3100Z340J Kemet)
C20,C21,C22,C23,C24,C25,C26,C27 = 680 µF, 20 %, 50 V, D 13.5 mm max., pitch 5 mm, 10000h@105°C (50ZLJ680M12.5X25 Rubycon)
C28 = 2.2 µF, 10 %, 50 VDC, pitch 5/7.5 mm, PET, body size 7.6 x 9.7 mm max.
C30,C31 = 10 µF, 20 %, 63 V, D 6.3 mm, pitch 2.5 mm, preferably 105°C
C32 = 10 nF, 10 %, 50 V, pitch 5 mm, X7R, body size 2.5 x 7.2 mm max.
C33 = 1 µF, 5 %, 63 VDC, pitch 5/7.5 mm, PET, body size 7.6 x 9.7 mm max.
C34 = 22 µF, 20 %, 35 V, bip., D 8 mm max., pitch 2.5/3.5 mm


Inductor
L1 = 1.5 mm enamelled copper wire, < 0.6 m, 13 turns, ID 10 mm

Semiconductor
D1,D2 = Zener diode 20 V, 5 %, 0.4 W, DO-35 (BZX79-C20,113 Nexperia)
D3 = Zener diode 33 V, 5 %, 1.3 W, DO-41 (BZV85-C33,113 Nexperia)
D4,D5 = 1N4148, DO-35
LED1,LED2,LED3,LED4 = LED, red, 2 x 5 mm rectangular (MCL453MD Multicomp Pro)
LED5 = LED, green, 5 mm, T-1 3/4 (5 mm)
T1,T2,T6,T7,T9,T10,T23,T26,T27 = BC546B, TO-92
T3,T4,T5,T8,T11,T12,T24 = BC556B, TO-92
T13,T14 = KSA1381, TO-126
T15,T16 = KSC3503, TO-126
T17 = MJE15032, TO-220
T18 = MJE15033, TO-220
T19,T20 = NJL3281D, TO−264, 5 LEAD
T21,T22 = NJL1302D, TO−264, 5 LEAD
T25 = BS170, TO-92
IC1, IC2 = LM334Z, TO-92
IC3 = OPA177FP, DIP-8

Other
K1 = 3way terminal block, pitch 5 mm (1729131, MKDSN 1,5/ 3-5,08 Phoenix Contact)
K2,K5 = 2way terminal block, pitch 5 mm (1729128 or MKDSN 1,5/ 2-5,08 Phoenix Contact)
INPUT = 2 x Press Mount Terminal Pin, 1.3 mm, PCB hole size 1.4 mm (13.14.419 Ettinger)
K3,K4 (=K6,K7) + 4 for 2nd PCB = metal standoff, 30 mm, M3, male-female (so 6 in total)
K8,K9 = Faston PCB, hole 3.3 mm, Tab 6.35mm x 0.81mm (42822-2 Amp/TE Connectivity or similar)
RE1 = Relay 16 A /250 VAC/30 VDC, G2R-1-E 48DC Omron
4 x M3 screw, 16 mm, black (T19/T20/T21/T22 to heatsink, 839672 Toolcraft)
8 x M3 screw, 12 mm, black (standoff PCB/T17/T18 to heatsink, M312 PRSTMCB100- TR Fastenings)
4 x M3 screw, 8 mm (LSP contacts fasten 2 standoffs to main PCB)
18 x M3 nut
8 x M3 washer, plain, steel
metal standoff, 10 mm, M3, male-female (PCB to heatsink)
HS1,HS2 = Heatsink, 9 °C/W, H 50.8 mm, SK 104 50,8 ST Fischer Elektronik
T17-T22 = Heatsink, 0.6 °C/W, 100x180x48mm, SK53-100-SA Fischer Elektronik
T19,T20,T21,T22 = Ceramic thermal pad (for T19..T22), 23 x 20 mm x 2 mm (SL-012-AL20 Silfox)
T17,T18 = Ceramic thermal pad (for T17/T18), 18 x 12 x 1.5 mm mm (SL-019-AL15 Silfox)
T17,T18 = Insulating bushing, TO-220 (for T17/T18, IB 6 Fischer Elektronik)
IC3 = IC socket DIP-8

Misc.
PCB 210364-1 v1.1