FAN3121, FAN3122

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3

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 VDD is above the UVLO threshold.

6, 7

OUT

Gate Drive Output (inverted from the input). Held LOW unless required input is present and VDD is

above the UVLO threshold.

1, 8

1, 8

VDD

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.

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

Figure 5. FAN3121 Pin Assignments (Repeated)

Figure 6. FAN3122 Pin Assignments (Repeated)

OUTPUT LOGIC

FAN3121

EN

IN

OUT

0

0

0

0

1 (Note 7)

0

1 (Note 7)

0

1

1 (Note 7)

1 (Note 7)

0

7. Default input signal if no external connection is made.

FAN3122

EN

IN

OUT

0

0 (Note 7)

0

0

1

0

1 (Note 7)

0 (Note 7)

0

1 (Note 7)

1

1