7

Application example

Figure 21 shows an application example using the STDRIVE101 to drive a three-phase motor with triple shunt

configuration.

Table 10. Typical application values (VDD = 3.3 V)

Name

Value

CS

100 nF / 100 V

CSPOL

120 µF / 100 V

CREG

100 nF / 25 V

CREGPOL

4.7 µF / 25 V

RDT

50 kΩ (tDT

≅570 ns)

RSC1

18 kΩ

RSC2

10 kΩ

RFAULT

39 kΩ

RS1, RS2, RS3

Values according to application requirements

RSNS1, RSNS2, RSNS3

Values according to application requirements

CCP

2.2 nF / 16 V

RCP

Values according to application requirements

The others features implemented are:

•

VDS monitoring protection with SCREF = 1.2 V (VDD = 3.3 V)

•

Overcurrent protection with internal comparator (CP pin)

Figure 21. Typical application schematic

+

VM

12V

VSCREF

Half-bridge 1

Half-bridge 2

Half-bridge 3

M

VDD

EN3/INL3

EN1/INL1

nFAULT

EN2/INL2

IN3/INH3

DT/MODE

SCREF

IN1/INH1

IN2/INH2

GLS2

OUT2

GHS2

BOOT2

GLS3

CP

OUT3

GHS3

BOOT3

STBY

HS

VBOOT

LS

BOOT1

GHS1

OUT1

GLS1

VCC

12 V

LDO Reg

+

-

+

-

+

-

VREF

+

VDSth

+

RDT

RFAULT

CS

CSPOL

CREGPOL

CREG

RSNS2

RSNS3

RSNS1

RS1

RS2

RS3

VDD

RCP

CCP

+

-

Signal conditioning

VDD

RSC1

RSC2

+

VDSth

VCC

VCC

STDRIVE101

Application example

DS13472 - Rev 1

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