SPF7302

Description

The SPF7302 is a fully protected, single chip full-bridge driver

IC for DC brush motor applications. The various protection

circuits integrated are: overvoltage protection (OVP);

overcurrent protection (OCP) with latch, which is adapted

to the DMOSFETs in each full bridge; undervoltage lockout

(UVLO); open load detection; and overcurrent limitation.

The package is a thermally enhanced 16-pin HSOP power

package with an exposed thermal pad on the bottom side of

the package.

Features and Benefits

▪ Maximum DC current 3 A continuous, 6 A pulsed (1 kHz,

duty cycle < 1%, pulse width < 10 μs)

▪ Operation modes: forward, reverse, brake (high- or low-

side freewheeling current circulation)

▪ Output disable pin (DI pin)

▪ Protections:

▫ Overvoltage protection (OVP), 36 V minimum

▫ Overcurrent protection (OCP), 3 A typical

▫ Overcurrent limitation (OCL), 6 A typical

▫ Externally adjustable delay timer to halt OCL

▫ Thermal shutdown protection (TSD), 151°C minimum

▫ Open load detection at startup

▪ Diagnosis output linked to OVP, OCP, TSD, UVLO, and

open load detection, at startup and in operation

Full Bridge DC Motor Driver

Functional Block Diagram

Package: 16 pin HSOP with exposed thermal pad

and tabs

Not to scale

Open Circuit

Detection

Diag

OUT1

VBB

VBB

OUT2

Open Circuit

Detection

Low-Side

Gate Driver

High-Side

Gate Driver

with OVP

Low-Side

Gate Driver

Low-Side

OCP

Low-Side

OCL

High-Side

OCP

High-Side

OCL

Pre-

Regulator

IN1

IN2

DI

Diagnostics

OVP

UVLO

TSD

IN1

IN2

DI

High-Side

Gate Driver

with OVP

Diag

Diag

Diag

Diag

Diag

Diag

Diag

CP

HS1

HS2

LS1

LS2

VBB

VBB

PGND

PGND

LGND

DLY

DIAG

28211