FOD8318 Datasheet, PDF (7/31 Pages) Fairchild Semiconductor – 2.5 A Output Current, IGBT Drive Optocoupler with Active Miller Clamp, Desaturation Detection, and Isolated Fault Sensing

Electrical Characteristics (Continued)
Apply over all recommended conditions; typical value is measured at V_DD1 = 5 V, V_DD2 – V_SS = 30 V, V_E – V_SS = 0 V,
T_A = 25 °C unless otherwise specified.
Symbol
Parameter
Conditions
Min. Typ. Max. Units Figure
I_OL
Low Level Output Current
V_O = V_SS + 3 V
V_O = V_SS + 6 V⁽¹¹⁾
I_OLF
Low Level Output Current
V_O – V_SS = 14 V
During Fault Condition
V_OH
High Level Output Voltage
I_O = –100 mA
(12)(13)(14)
V_OL
I_DD1H
I_DD1L
I_DD2H
I_DD2L
I_SH
I_SL
I_EL
I_EH
I_CHG
I_DSCHG
V_UVLO+
V_UVLO-
UVLO_HYS
V_DESAT
V_{CLAMP_}
THRES
I_CLAMPL
Low Level Output Voltage
High Level Supply Current
Low Level Supply Current
High Level Output Supply
Current
I_O = 100 mA
V_IN+ = V_DD1 = 5.5 V,
V_IN– = 0 V
V_IN+ = V_IN- = 0 V,
V_DD1 = 5.5 V
V_O = Open⁽¹⁴⁾
Low Level Output Supply
Current
V_O = Open
High Level Source Current
Low Level Source Current
V_E Low Level Supply Current
V_E High Level Supply Current
Blanking Capacitor Charge
Current
I_O = 0 mA
I_O = 0 mA
V_DESAT = 2 V^(14)(15)
Blanking Capacitor
Discharge Current
V_DESAT = 7 V
Under-Voltage Lockout
Threshold⁽¹⁴⁾
Under-Voltage Lockout
Threshold Hysteresis
DESAT Threshold⁽¹⁴⁾
Clamping Threshold Voltage
V_O > 5 V at 25 °C
V_O < 5 V at 25 °C
At 25 °C
V_DD2 – V_E > V_UVLO-,
V_O < 5 V
Clamp Low Level Sinking
Current
V_O = V_SS + 2.5 V
1
2.5
90
V_S –
1.0 V
-0.5
-0.5
-0.13
10
9
0.4
6
0.35
3
185
V_S –
0.5 V
0.1
14
2
1
0.8
0.65
0.6
-0.2
-0.25
-0.25
36
11.5
10
1.5
7
2.2
1.2
A 3, 37
A
230 mA 4, 41
V 5, 7, 38
0.5
V 6, 8, 38
17
mA 9, 39
3
mA
3
mA 10, 11,
40
2.8
mA
1.5
1.4
-0.37
mA 40
mA 40
mA 13, 40
mA
mA 12, 41
mA 41
13.5
V 15, 29,
V
42
V
9
V 16, 41
V 33, 52
A 32, 51
Notes:
10. Maximum pulse width = 10 µs, maximum duty cycle = 0.2 %.
11. Maximum pulse width = 4.99 ms, maximum duty cycle = 99.8 %.
12. V_OH is measured with the DC load current in this testing (maximum pulse width = 1 ms, maximum duty cycle = 20 %).
When driving capacitive loads, V_OH approaches V_DD as I_OH approaches zero units.
13. Positive output supply voltage (V_DD2 – V_E) should be at least 15 V. This ensures adequate margin in excess of the
maximum under-voltage lockout threshold V_UVLO+ of 13.5 V.
14. When V_DD2 – V_E > V_UVLO and output state V_O of the FOD8318 is allowed to go HIGH, the DESAT detection feature
is active and provides the primary source of IGBT protection. UVLO is needed to ensure DESAT detection is
functional.
15. The blanking time, t_BLANK, is adjustable by an external capacitor (C_BLANK) where t_BLANK = C_BLANK * (V_DESAT / I_CHG).
©2010 Fairchild Semiconductor Corporation
FOD8318 Rev. 1.1.2
7
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