FOD8318 Datasheet, PDF (2/31 Pages) Fairchild Semiconductor – 2.5 A Output Current, IGBT Drive Optocoupler with Active Miller Clamp, Desaturation Detection, and Isolated Fault Sensing

Truth Table
V_IN+
V_IN–
UVLO
(V_DD2 – V_E)
DESAT
Detected?
X
X
LOW
X
HIGH
X
Active
X
X
X
Yes
X
X
X
HIGH
X
X
LOW
Not Active
No
*V_OUT is always LOW with ‘clamp’ being active (gate voltage < 2 V above V_SS).
FAULT
X
LOW
X
X
HIGH
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
V_IN+
V_IN–
V_DD1
GND1
RESET
FAULT
V_LED1+
V_LED1-
V_SS
V_CLAMP
V_O
V_S
V_DD2
DESAT
V_LED2+
V_E
Description
Non-inverting gate drive control input
Inverting gate drive control input
Positive input supply voltage (3 V to 5.5 V)
Input ground
Fault reset input
Fault output
LED 1 anode (must be left unconnected)
LED 1 cathode (must be connected to ground)
Output supply voltage (negative)
Active Miller clamp supply voltage
Gate drive output voltage
Source of pull-up PMOS transistor
Positive output supply voltage
Desaturation voltage input
LED 2 anode (must be left unconnected)
Output supply voltage / IGBT emitter
V_IN+ 1
V_IN– 2
V_DD1 3
GND1 4
RESET 5
FAULT 6
V_LED1+ 7
V_LED1- 8
16 V_E
15 V_LED2+
14 DESAT
13 V_DD2
12 V_S
11 V_O
10 V_CLAMP
9 V_SS
V_OUT*
LOW
LOW
LOW
LOW
HIGH
©2010 Fairchild Semiconductor Corporation
FOD8318 Rev. 1.1.2
2
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