Pin #

Name

Function

Type

Note

11

RSP_T

DC/DC converter current positive sense

Analog IN

-

12

VT_FB

VTank voltage feedback

Analog IN

-

13

CHS_A

VTank and Vbat high-sides bank A bootstrap capacitor

Supply

-

14

GHST_A

Pre-Driver output for VTank high-side bank A power N-channel

MOSFET

Analog OUT

Push-pull type

15

RSPHS_A Bank A positive node of high-side current shunt

Analog IN

-

16

GHSB_A

Pre-Driver output for Vbat high-side bank A power N-channel

MOSFET

Analog OUT

Push-pull type

17

INJH_A

Bank A of injectors high-side voltage feedback

Analog IN

-

18

INJL_Ax

Bank A INJx low-side voltage feedback

Analog IN

-

19

GLS_Ax

Pre-Driver output for low-side bank A INJx power N-channel

MOSFET

Analog OUT

Push-pull type

20

INJL_Ay

Bank A INJy low-side voltage feedback

Analog IN

-

21

GLS_Ay

Pre-Driver output for low-side bank A INJy power N-channel

MOSFET

Analog OUT

Push-pull type

22

RSN_A

Bank A negative reference for current sensing amplifier

Analog IN

-

23

RSP_A

Bank A current positive sense

Analog IN

-

24

RSN_P

Fuel pump negative reference for current sensing amplifier

Analog IN

-

25

RSP_P

Fuel pump current positive sense

Analog IN

-

26

RSP_B

Bank B current positive sense

Analog IN

-

27

RSN_B

Bank B negative reference for current sensing amplifier

Analog IN

-

28

GLS_By

Pre-Driver output for low-Side bank B INJy power N-channel

MOSFET

Analog OUT

Push-pull type

29

INJL_By

Bank B INJy low-side voltage feedback

Analog IN

-

30

GLS_Bx

Pre-Driver output for low-side bank B INJx power N-channel

MOSFET

Analog OUT

Push-pull type

31

INJL_Bx

Bank B INJx low-side voltage feedback

Analog IN

-

32

INJH_B

Bank B of injectors high side voltage feedback

Analog IN

-

33

GHSB_B

Pre-Driver output for Vbat high-side bank B power N-channel

MOSFET

Analog OUT

Push-pull type

34

RSPHS_B Bank B positive node of high-side current shunt

Analog IN

-

35

GHST_B

Pre-Driver output for VTank high-side bank B power N-channel

MOSFET

Analog OUT

Push-pull type

36

CHS_B

VTank and Vbat high-sides bank B bootstrap capacitor

Supply

-

37

GLS_P

Pre-driver output for low-side fuel pump N-channel MOSFET

Analog OUT

Push-pull type

38

HPPL

Fuel pump low-side voltage feedback

Analog IN

-

39

GHS_P

Pre-driver output for high-side fuel pump N-channel MOSFET

Analog OUT

Push-pull type

40

HPPH

Fuel pump high-side voltage feedback

Analog IN

-

41

CHS_P

Fuel pump high-side bootstrap capacitor

Supply

-

42

IRQ

Interrupt request output

Digital OUT

Open drain

43

SCK

SPI clock input

Digital IN

Internal pull-up

44

CS

SPI chip select input

Digital IN

Internal pull-up

45

DIN

SPI data input

Digital IN

-

L9781

Pin description

DB3720 - Rev 1

page 3/10