FAN3121 Datasheet, PDF (3/21 Pages) Fairchild Semiconductor – Single 9A High-Speed, Low-Side Gate Driver

VDD 1
IN 2
EN 3
GND 4
8 VDD
7 OUT
6 _OUT
5 GND
Figure 5. FAN3121 Pin Assignments (Repeated)
VDD 1
IN 2
EN 3
GND 4
8 VDD
7 OUT
6 OUT
5 GND
Figure 6. FAN3122 Pin Assignments (Repeated)
Pin Definitions
FAN3121 FAN3122
3
3
4, 5
4, 5
2
2
6, 7
6, 7
1, 8
1, 8
Name
EN
GND
IN
OUT
OUT
VDD
P1
Description
Enable Input. Pull pin LOW to inhibit driver. EN has logic thresholds for both
TTL and CMOS IN thresholds.
Ground. Common ground reference for input and output circuits.
Input.
Gate Drive Output. Held LOW unless required input is present and VDD is
above the UVLO threshold.
Gate Drive Output (inverted from the input). Held LOW unless required input
is present and VDD is above the UVLO threshold.
Supply Voltage. Provides power to the IC.
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.
Output Logic
FAN3121
EN
IN
OUT
0
0
0
0
1⁽⁷⁾
0
1⁽⁷⁾
0
1
1⁽⁷⁾
1⁽⁷⁾
0
Note:
7. Default input signal if no external connection is made.
FAN3122
EN
IN
OUT
0
0⁽⁷⁾
0
0
1
0
1⁽⁷⁾
0⁽⁷⁾
0
1⁽⁷⁾
1
1
© 2008 Fairchild Semiconductor Corporation
FAN3121 / FAN3122 • Rev. 1.0.0
3
www.fairchildsemi.com