Pin Configuration

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

8

7

6

5

4

3

2

1

FDMF3035

SW

SW

SW

GL

PGND

PVCC

N/C

N/C

PGND

PGND

PGND

PGND

VIN

VIN

VIN

8

7

6

5

4

3

2

1

16

17

18

19

20

21

22

23

32

AGND

33

GL

Figure 3.

Pin Configuration - Top View and Transparent View

Pin Definitions

Pin #

Name

Description

1

PWM

PWM input to the gate driver IC

2

FCCM

The FCCM pin enables or disables Diode Emulation. When FCCM is LOW, diode

emulation is allowed. When FCCM is HIGH, continuous conduction mode is forced. High

impedance on the input of FCCM will shut down the driver IC (and module).

3

VCC

Power supply input for all analog control functions; this is the

4, 32

AGND

Analog ground for analog portions of the IC and for substrate, pin 4 and pin 32 are

internally fused (shorted)

5

BOOT

Supply for high-side MOSFET gate driver. A capacitor from BOOT to PHASE supplies the

charge to turn on the N-channel high-side MOSFET. During the freewheeling interval (LS

MOSFET on), the high side capacitor is recharged by an internal diode connected to

PVCC.

6, 30, 31

N/C

No connect

7

PHASE

Return connection for the boot capacitor

8~11

VIN

Power input for the power stage

12~15, 28

PGND

Power return for the power stage

16~26

SW

Switching node junction between high and low side MOSFETs; also the input into both the

gate driver SW node comparator and the ZCD comparator

27, 33

GL

Low-side MOSFET gate monitor

29

PVCC

Power supply input for LS

(1) gate driver and boot diode

Note:

1.

LS = Low Side.

www.onsemi.com

3