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VNH3SP30-E

Application information

33

3.3

Test mode

The PWM pin can be used to test the load connection between two half-bridges. In the Test

mode (Vpwm = -2 V) the internal power MOS gate drivers are disabled. The INA or INB inputs

can be used to turn on the high side A or B, respectively, in order to connect one side of the

load at VCC voltage. The check of the voltage on the other side of the load can be used to

verify the continuity of the load connection. In case of load disconnection, the DIADX/ENX

pin corresponding to the faulty output is pulled down.

Figure 34. Half-bridge configuration

Note:

The VNH3SP30-E can be used as a high power half-bridge driver achieving an On

resistance per leg of 22.5 mΩ.

Figure 35. Multi-motor configuration

Note:

The VNH3SP30-E can easily be designed in multi-motor driving applications such as seat

positioning systems, where only one motor must be driven at a time. The DIAGX/ENX pins

allow the unused half-bridges to be put into high impedance.

M

OUTA

OUTA

OUTB

OUTB

VCC

PWM

DIAGA/ENA

INA

DIAGB/ENB

INB

GNDB

GNDA

GNDB

GNDA

PWM

DIAGA/ENA

INA

DIAGB/ENB

INB

M2

OUTA

OUTA

OUTB

OUTB

VCC

PWM

DIAGA/ENA

INA

DIAGB/ENB

INB

GNDB

GNDA

GNDB

GNDA

PWM

DIAGA/ENA

INA

DIAGB/ENB

INB

M1

M3