Data Sheet

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3
FAN3121 / FAN3122 — Single 9-A High-Speed, Low-Side Gate Driver
Pin Definitions
FAN3121
FAN3122
Name
Description
3
3
EN
Enable Input. Pull pin LOW to inhibit driver. EN has logic thresholds for both
TTL and CMOS IN thresholds.
4, 5
4, 5
GND
Ground. Common ground reference for input and output circuits.
2
2
IN
Input.
6, 7
OUT
Gate Drive Output. Held LOW unless required input is present and V
DD
is
above the UVLO threshold.
6, 7
OUT
Gate Drive Output (inverted from the input). Held LOW unless required
input is present and V
DD
is above the UVLO threshold.
1, 8
1, 8
V
DD
Supply Voltage. Provides power to the IC.
P1
Thermal Pad (MLP only). Exposed metal on the bottom of the package;
may be left floating or connected to GND; NOT suitable for carrying current.
Figure 5. FAN3121 Pin Assignments (Repeated)
Figure 6. FAN3122 Pin Assignments (Repeated)
Output Logic
FAN3121
FAN3122
EN
IN
OUT
EN
IN
OUT
0
0
0
0
0
(8)
0
0
1
(8)
0
0
1
0
1
(8)
0
1
1
(8)
0
(8)
0
1
(8)
1
(8)
0
1
(8)
1
1
Note:
8. Default input signal if no external connection is made.
1
2
3
6
7
8
4
5
VDD
GND
EN
IN
VDD
OUT
GND
OUT
1
2
3
6
7
8
4
5
EN
IN
VDD
GND
VDD
GND
OUT
OUT