SPF7302 Datasheet, PDF (1/16 Pages) Allegro MicroSystems – Full Bridge DC Motor Driver

SPF7302
Full Bridge DC Motor Driver
Features and Benefits
▪ Supply voltage, V_BB , 36 V maximum
▪ Maximum DC current 3 A continuous, 6 A pulsed (1 kHz,
duty cycle < 1%, pulse width < 10 μs)
▪ R_DS(on) = 300 mΩ maximum, at T_J = 125ºC
▪ 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
▫ Undervoltage lockout on V_BB (UVLO), 4.2 V minimum
▫ Open load detection at startup
▪ Diagnosis output linked to OVP, OCP, TSD, UVLO, and
open load detection, at startup and in operation
Package: 16 pin HSOP with exposed thermal pad
and tabs
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.
Not to scale
Functional Block Diagram
CP
VBB VBB
VBB VBB
V_BB
Pre-
Regulator
V_REF
Diag
OVP
UVLO
TSD
IN1
IN1
IN2
IN2
DI
DI
Diag _High-Side
OCL
High-Side
Gate Driver
with OVP
HS1
LS1
Diag _High-Side
OCP
High-Side
Gate Driver
with OVP
HS2
Diag _{Open Circuit}
Detection
Diag _{Open Circuit}
LS2
Detection
DIAG
Diag
Diagnostics
Low-Side
Gate Driver
Diag _Low-Side
OCL
Low-Side
Gate Driver
Diag _Low-Side
OCP
DLY
LGND
PGND
PGND
OUT1
OUT2
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