mc33198dr2 Freescale Semiconductor, Inc, mc33198dr2 Datasheet - Page 14

• Manufacturer Part Number: mc33198dr2
• Description: Automotive High-side Tmos Driver
• Manufacturer: Freescale Semiconductor, Inc

sustain a reverse battery operation, providing that the DRN
resistor is higher than 3.3K. A 1K resistor at pin 1 is also
necessary to limit the reverse current flowing through the
MOSFET body diode.
14
33198
FUNCTIONAL DESCRIPTION
INTRODUCTION
Pin 2, which is normally connected to a resistor, can
Device drive
circuitry and
interface
Figure 19. 33198 GND Disconnection Circuitry
turn-on in case of module
Module Gnd
to present MOSFET
Additional circuitry
Gnd disconnection
5V
IN
6
7
8
MC33198
C
Vbat
5
3
4
1
R1 = 3,3K
Q1 = 2N2222
R1
Q1
Vbat
LOAD
OPERATION
connection is still present, pin 3 of the MC33198 goes to
about 2/3 of V
R1/Q1, the Gate/Source voltage of the MOSFET is shorted
as soon as pin 3 voltage rises above GND level. See
19, 33198 GND Disconnection Circuitry
When module GND is disconnected, and if the VBAT
BAT ,
if additional circuitry is not inserted. With
Analog Integrated Circuit Device Data
Freescale Semiconductor
Figure