7

MD2131

Supertex inc.

www.supertex.com

Doc.# DSFP-MD2131

C102412

Pin Description

Pin #

Function

Description

1

KA

Kelvin connection A

2

GND

High current output ground

3

C1A

Bypass cap KA, 10nF low ESR X7R ceramic cap

4

GND

High current output ground

5

VDD

Supplies voltage of the gate driver and internal analog circuit

6

C3A

Bypass cap to GND of Pin#7, 10nF low ESR X7R ceramic cap

7

GND

High current output ground

8

VLL

Supply voltage of logic circuit

9

DGND

Digital logic ground

10

SCK

Serial clock input

11

SDI

Serial data input

12

QA

PWM control logic input of quadrature-phase A

13

QB

PWM control logic input of quadrature-phase B

14

IA

PWM control logic input of in-phase A

15

IB

PWM control logic input of in-phase B

16

VDD

Supplies voltage of the gate driver and internal analog circuit

17

AGND

Analog reference ground

18

SDO

Serial data output, updated at SCK falling edge

19

CS

Serial chip select, active low, and buffer register loading clock on rising edge

20

LD

DAC data register loading clock on rising edge

21

EN

Enable, EN = Low, PA = PB = Hi-Z

22

VREF

External reference voltage input

23

RFB

Resistor to GND, 50kΩ 0.1% for the best accuracy

24

GND

High current output ground

25

C3B

Bypass cap to GND of Pin#24, 10nF low ESR X7R ceramic cap

26

VDD

Supplies voltage of the gate driver and internal analog circuit

27

GND

High current output ground

28

C1B

Bypass cap to KB, 10nF low ESR X7R ceramic cap

29

GND

High current output ground

30

KB

Kelvin connection B

31

C2B

Bypass cap to KB, 10nF low ESR X7R ceramic cap

32

PB

Current sinking source driver output B, external Schottky diode to VDD

33

PB

Current sinking source driver output B, external Schottky diode to VDD

34

PB

Current sinking source driver output B, external Schottky diode to VDD

35

VSUB

Substrate voltage must connected to the lowest potential of the IC, the ground

36

37

PA

Current sinking source driver output A, external Schottky diode to VDD

38

PA

Current sinking source driver output A, external Schottky diode to VDD

39

PA

Current sinking source driver output A, external Schottky diode to VDD

40

C2A

Bypass Cap to KA, 10nF low ESR X7R ceramic cap

Notes:

1.

Pins #35 & #36 are VSUB connected to the center thermal pad internally in the package.

2.

All bypass capacitors need be very close to the pins