NCV70514

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2

TYPICAL APPLICATION SCHEMATIC

The application schematic below shows typical connections for applications with low axis counts and/or with software SPI

implementation. For applications with many stepper motor drivers, some “minimal wiring” examples are shown at the last

sections of this datasheet.

NCV70514

ERRB

GND

CSB

CLK

DI

DO

NXT

DIR

MOTXP

MOTXN

MOTYP

MOTYN

M

VBB

100 uF

C2

C1

100 nF

uC

D1

R1

R2

RHB

C3

100 nF

STEP1

STEP0

C4

100 nF

VBB

VDD

TST2

TST1

C5

C6

C7

C8

R3

R4

R11

R5

R6

R7

R8

R9

R12

R10

Figure 1. Typical Application Schematic

Table 1. EXTERNAL COMPONENTS

Component

Function

Typ. Value

Max Tolerance

Unit

C1

22 ... 100

±20%

mF

C2, C3

100

±20%

nF

C4

100

±20%

nF

C5, C6, C7, C8

Optional EMC filtering capacitor (Note 4)

1 ... 3.3 max

±20%

nF

R1, R2

Pull up resistor

1..5

±10%

k

W

R3 – R10

Optional resistors

1

±10%

k

W

R11, R12

Optional resistors (Note 5)

100

±10%

W

D1

Optional reverse protection diode

e.g. MURD530

1. Low ESR < 4

W, mounted as close as possible to the NCV70514. Total decoupling capacitance value has to be chosen properly to reduce

the supply voltage ripple and to avoid EM emission.

2. C2 and C3 must be close to pins VBB and coupled GND directly.

3. C4 must be a ceramic capacitor to assure low ESR.

4. Optional capacitors for improvement of EMC and system ESD performance. The slope times on motor pins can be longer than specified

in the AC table.

5. Value depends on characteristics of

mC inputs for DO and ERRB signals.