IRAUDAMP4 Datasheet, PDF (30/44 Pages) International Rectifier – 120 W x 2 Channel Class D Audio Power Amplifier

Daughter Board Schematics:
J1
OT ¹
VSS ²
PWM1 ³
IN1 ⁴
GND1 ⁵
VAA ⁶
PWM2 ⁷
VSS ⁸
GND2 ⁹
VCC ¹⁰
SD ¹¹
IN2 ¹²
PWM 1
VSS1
PWM 2 ^J2
VCC
R43
SD
4.7K
CON EISA31
DS1
160-1414-1-ND
CH2 O
CH2 O
CH2O
CH2 O
-B
-B
-B
-B
CH1 O
CH1 O
CH1 O
CH1 O
+B
+B
+B
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VSS2
CH2 O
-B
CH1 O
SD
+B
CSD1
D1
R1
1N4148 100R
PWM 1
D9
MA2YD2300
VSS1
C11
47pF
TP1
R7
1.2k
D7
S1DB-FDICT-ND
-B
VCC
+B
R3
R19
10K
R13 R15
47K
4.7R 10R
C1
2.2uF, 25V
C3
10uF, 16V
R5
8.2k
C5
R9
OPEN 8.2K
D3
MURA120T3OSCT-ND
U1
1 _VDD
CSH ¹⁶
2 _CSD
VB ¹⁵
3 _IN
HO ¹⁴
4 _VSS
VS ¹³
5 _NC
NC ¹²
6 _VREF
VCC ¹¹
7 _OC
LO ¹⁰
8 _DT
COM ⁹
IRS20955S
R21
10K
C7
22uF, 25V
R23
0R
D5
BAV19WDICT-ND
Q3
C13
0.1uF
R25
10k
R27
10R
IRF6645
C15
C17
CH1 O
C9
2.2uF, 25V
Q5
R29
10R _IRF6645
R31
1R
R11
-B
3.3K
VCC
+B
+B _{OTP CH2}
Rp2
R34
100C
1K
C22
47nF
R38
100K
Q2
R36
100K
MMBT5401
CSD2
Q8
R40
100K
R42
MMBT3904 10K
C24
47nF
VSS2
OTP CH1 ^+B
R33
1K
Rp1
100C
R35 ^Q1
100K
C21
47nF
D2CSD2R2
SD
1N4148 ^100R
PWM 2
D8
MA2YD2300
C12
47pF
MMBT5401
R37
100K
VSS2
TP2
C23
47nF
CSD1
R39
100K
Q7
R41
MMBT3904
10K
R8
1.2k
C6
OPEN
VSS1
R4
10K
R20
R14 R16
47K
4.7R _10R
C2
2.2uF, 25V
C4
10uF, 16V
D4
MURA120T3OSCT-ND
U2
1 _VDD
CSH ¹⁶
2 _CSD
VB ¹⁵
3 _IN
HO ¹⁴
4 _VSS
VS ¹³
R22
10K
C8
22uF, 25V
R24
0R
D6
BAV19WDICT-ND
Q4
R26
10k
R28
10R _IRF6645
C14
0.1uF
C16
C18
CH2 O
5 _NC
NC ¹²
R6
6 _VREF
VCC ¹¹
8.2k
7 _OC
LO ¹⁰
R10
8 _DT
COM ⁹
8.2K
IRS20955S
C10
2.2uF, 25V
Q6
R30
10R _IRF6645
R32
1R
R12
-B
3.3K
IRAUDAMP VER.4 - DAUGHTER BOARD
Figure 33. Daughter Board Schematic with Class D Stage for Two Audio Channels
www.irf.com
RD-0617
29