VB024 STMicroelectronics, VB024 Datasheet - Page 3

• Manufacturer Part Number: VB024
• Description: MOSFET & Power Driver ICs DISC BY STM 1/99
• Manufacturer: STMicroelectronics

Specifications of VB024

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (V
L
Note 1: Time fron input swi tching V
PRINCIPLE OF OPERATION
The VB024 is designed to drive the primary side
of an ignition coil and provide a logic signal
output to indicate a predetermined coil current
level. This output signal is used to perform dwell
control. This part is intended for use in Engine
Control Modules. It could also be used in an
ignition module or integrated into an ignition coil
assembly.
The VB024 accepts an input High signal from the
control IC to start charging the primary side of the
ignition coil. When the primary coil current
reaches 3 amps, the VB024 outputs a logic High
signal to the control IC. This flag signal is used in
the calculation of the dwell time.
This device also has a maximum primary coil
current I
aproximately 1.5 times the nominal primary coil
currnet. If the Ic reaches I
will Shut-off causing the spark to occour.
coil
Symbol
V
V
I
V
I
I
c (max)
V
V
I
V
V
ce(sat)
V
s(on)
d(on)
I
= 6mH unless otherwise specified)
V
t
diagH
diagL
diag
V
V
inH
neg
inH
pos
hys
off
inL
cl
s
d
c(max)
High Voltage Clamp
Saturation Voltage of
The Power Stage
Control Circuit Supply
Current
Control Circuit Supply
Voltage
Driver Stage Stand-by
Current
Driver Stage Supply
Voltage
Diagnostic Current at
Wich The Flag Switches
High Level Input Voltage
Low Level Input Voltage
High Level Input Current V
Positive Threshold
Negative Threshold
Hysteresis Voltage
Turn-Off Current
Switch-Off Time
High Level Diagnostic
Output Voltage
Low Level Diagnostic
Output Volatge
Shut-off feature. I
Parameter
c(max)
ne g
unti l V
, the output stage
c(max)
V
I
V
-40
V
I
R
R
CL
c
c
in
in
in
in
flag
flag
= 6A; I
= 6 A (see note 1)
drops to 200 V
o
= 0.4 V
= 4 V
= 5.5 V
= 4 V -40
b
C
= 20 K
= 100 K
= 12 V; V
equals
T
Test Conditions
j
d
= 80 mA; V
125
-40
o
C
s
o
= 5 V Regulated; T
o
C
C
The VB024 is also internally clamped to protect it
from
inductance as the output stage is turned off.
OVERVOLTAGE
The VB024 withstand the following transient test
performed using a ”Schaffner” equipment at T
80
1) LOAD DUMP
Ten pulses with 10 second intervals between
each transient. The device withstand load dump
while fully on, fully off and during the transition
between states (see figures 3 and 4).
2) NEGATIVE TRANSIENTS
Ten negative transients with 10 second intervals
between each transient (see figure 5).
3) REVERSE BATTERY
Inversion of battery voltage for a time = 60 sec
(see figure 5).
T
j
T
o
C:
j
125
in
the
125
= 4V
o
C
o
C
flyback
j
= 25
Min.
2.75
320
4.5
5.5
2.8
1.3
1.3
7.3
20
10
4
0
4
voltage
o
C; R
Typ.
coil
of
= 500 m ;
Max.
3.35
510
180
600
5.5
5.5
0.2
3.2
1.7
1.7
8.8
4.5
0.1
15
16
80
the
2
VB024
primary
Unit
mA
mA
mA
V
V
V
V
V
V
V
V
V
A
V
V
A
s
A
3/8
=