IRAUDAMP7D_15 Datasheet, PDF (23/41 Pages) International Rectifier – 25W-500W Scalable Output Power

protection (DCP) and over temperature protection (OTP), are realized externally to the IRS2092
(Fig 27).
In the event that any of these external fault conditions are detected, the external shutdown circuit
will disable the output by pulling down CSD pins, turning on red LEDs, and turning off blue LEDs
(Fig 28). If the fault condition persists, the protection circuit stays in shutdown until the fault is
removed. Once the fault is cleared, the blue LEDs turn on and red LEDs turn off.
TH100 is thermally connected with Heatsink
OTP
TH100
2.2k
R103
715R
R101
4.7k
R104
4.7k Q101
-VSS1
-VSS1
S1 ₂
1
3
4
5
6
SD
R102
SW DPDT
10k
DCP
Q103
2N3906
+B
R108
100k
R109
100k
R110
100k
CP100
CH1_OUT
CH2_OUT
330uF, 10V
+B
Z100
*68V
R111
10k
Z101
*39V
R105
10k
R106 R107
10k 10k JW3
R112
47K
-VSS1
C100
0.1uF
R113
10k
-VSS1
Fig 27 DCP, OTP, UVP and OVP Protection Circuits
.
.
R17
+VAA
+
1.2V
CSH
VB
HO
D4
+B
R18
BAV19
FET1
LP Filter
FET2 ^{. CSD} _CSD
VS
.
VCC
-VSS _OCREF
LO
BLUE
5.1V
OCREF
R13
R12
OCSET
COM
LED1
-B
Fig 28 Simplified Functional Diagram of OCP and Associated LED Indicators
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IRAUDAMP7D REV 2.9
Page 23 of 41