IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
THD Performance Test
THD + N Ratio % vs. Output Power
Magenta & Yellow plot : 2-ohm @ +/-68Vbus
Red plot : 4-ohm @ +/-68Vbus
THD + N Ratio vs. Output Power
Cyan plot : 4-ohm @ +/-35Vbus
Red plot : 2-ohm @ +/-78Vbus
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
THD + N Ratio % vs. Output Power
2-ohm @ +/-75Vbus
Note : The THD variation 500W -1.2kW range is
caused by the initial temperature of the
mosfets before / during the sweep.
The yellow plot is a cold start from ~25C.
The rest of the plots are results from a warm
board that has been repeatedly tested.
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
Low side R4 / R5 : 8k2 / 2k2
High side R3 / R2 : 8k2 / 2k2
The peak of the short circuit current is highly dependent on the interrelationship of the Rdson vs.
junction temperature of the mosfets. The variation of the OCP current is deemed to be
reasonable considering duration the daughter board is already running which warms up the board
under test. The instantaneous OCP trip level is decided by the Ids and Rdson as a function of Tj.
The ckt. designators R2/R3 and R4/R6 are referring to the OCP test portion of IRS20955
datasheet / appnote AN1138 for IRS2092.
Daughter Board#2 ( Idle self-osc freq : ~360kHz)
+Peak Output Inductor
current during Short Circuit
Test for Ch1 : ~-107.2Apk
+Peak Output Inductor current during
Short Circuit Test for Ch1 : ~+75.5Apk
Daughter Board#3 ( Idle self-osc freq : ~349kHz)
+Peak Output Inductor
current during short circuit
test for Ch1 : ~+81.6 Apk
-Peak Output Inductor current during
short circuit test for Ch2 : ~-95.4 Apk
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
Daughter Board#5 ( Idle self-osc freq : ~357kHz)
-Peak Output Inductor current during
short circuit test for Ch2 : ~+70.35 Apk
-Peak Output Inductor current during
short circuit test for Ch2 : ~-62.4 Apk
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
Top Side Component Overlay
Top Side Copper & Overlay
Bottom Side Copper & Component Overlay
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
Front View
Top Side (back view)
Bottom side
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
IRS2092 : 1-kW Buffered IRFB4227 (TO220)
Class D Amplifier using modified IRAUDAMP5
Class D, 1kW Single Channel TO220 buffered Daughter Board IRS2092S Module Schematic
Drawn by: ISRAEL SERRANO
+75V Bus
+75V Bus
SCH_DB_2092_Rev8
R45
R52
open
R40
33k
C18
CH1
VAA
Audio Gnd 1
4
5
6
2
R1
SD
C10
-5V
10R
C21
R41
2.2k
Q6A
R23A IRFB4227
10R
GND
VB
R23B
10R
Q6B
IRFB4227
15
IN-
HO
C17
0.1uF
14
C5
22uF
4
COMP
VS
13
6
R19
CSD
VCC
VSS
LO
12
R22B
10K
10K
CH1
C14
0.22 uF
CH1 Output to LPF1
CH1 O J2
TP1
9
10
11
12
11
R44
VREF
COM
+B
Q3
C31
10
R30
-B
OCSET
DT
Heatsink
CH2
ZXTN25100BFH
J2
R12
4.7K
R5
R17
2.2k
100nF
R9
10R
9
IRS2092S
R50
open
TP1
A26570-ND
R37
1R
10R
13
14
15
16
10R
7
8
SD
open
3.3K
R13
8.2K
D7
R22A
R44A OPEN
R26 VCC
4.7R
8.2k
3.3uF
VCC
Audio Gnd 2
Q8
ZXTP25100BFH
C32
0.22 uF
C23
5
IN-2
R32
D6
10uF
C12
J1
A26568-ND
16
C1
1nF
100R
R3
VSS
1nF,250V
C30
10nF
10
11
12
CSH
R25
10K
VB
3
SD
7
8
9
VAA
1K
1k
1nF,250V
A26568-ND
VSS
GND2
P1
R46
3.01k
VAA
D4
C33
100nF
D1
8.2k
10R
IN-1
1
2
3
OC
VSS
1
R21
10R
GND1
R43
U1
+5V
+B
Q9
ZXTN25100BFH
3.3uF
R7
J1
10R
-75V Bus
R21A
10R
Q5A
R21B
10R
1
2
3
4
Q5B
Q2
A26570-ND
C3
10uF
ZXTP25100BFH
DS1
5
6
7
8
IRFB4227
IRFB4227
R20A
R20B
10K
10K
-B
Note : 1) OCP ckt setting is remarkably accurate based on repeated test.
2) +/-75V bus and heatsink are intended for 2-ohm load -1kW testing.
3) Output is taken from 2 output connectors which make use of both Ch1 & Ch2 output
filters of a modified IRAUDAMP5 board.
4) All test results in this report are subject to change / confirmation test.
--75V Bus
-B
-B