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參數(shù)資料
| 型號(hào)： | VB024 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH VOLTAGE IGNITION COIL DRIVER POWER IC |
| 中文描述： | 高壓點(diǎn)火線圈驅(qū)動(dòng)功率集成電路 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 110K |
| 代理商： | VB024 |
ELECTRICAL CHARACTERISTICS
(V
b
= 12 V; V
s
= 5 V Regulated; T
j
= 25
o
C; R
coil
= 500 m
;
L
coil
= 6mH unless otherwise specified)
Symbol
V
cl
V
ce(sat)
Parameter
Test Conditions
-40
o
C
≤
T
j
≤
125
o
C
I
d
= 80 mA;
Min.
320
Typ.
Max.
510
2
Unit
V
V
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
in
= 5.5 V
Positive Threshold
Negative Threshold
Hysteresis Voltage
Turn-Off Current
Switch-Off Time
High Level Diagnostic
Output Voltage
Low Level Diagnostic
Output Volatge
V
in
= 0.4 V
I
c
= 6A;
V
in
= 4V
I
s(on)
15
mA
V
s
4.5
5.5
V
I
d(on)
V
in
= 4 V
180
mA
V
d
5.5
16
V
I
diag
-40
o
C
≤
T
j
≤
125
o
C
2.75
3.35
mA
V
inH
V
inL
I
inH
V
pos
V
neg
V
hys
I
c(max)
t
off
V
diagH
4
0
5.5
0.2
600
3.2
1.7
1.7
8.8
80
4.5
V
V
μ
A
V
V
V
A
μ
s
V
20
2.8
1.3
1.3
7.3
10
4
V
in
= 4 V
I
c
= 6 A (see note 1)
R
flag
= 20 K
-40
o
C
≤
T
j
≤
125
o
C
V
diagL
R
flag
= 100 K
0.1
V
Note 1: Time fron input switching V
neg
until V
CL
drops to 200 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
c(max)
Shut-off feature. I
c(max)
equals
aproximately 1.5 times the nominal primary coil
currnet. If the Ic reaches I
c(max)
, the output stage
will Shut-off causing the spark to occour.
The VB024 is also internally clamped to protect it
from
the
flyback
voltage
inductance as the output stage is turned off.
of
the
primary
OVERVOLTAGE
The VB024 withstand the following transient test
performed using a ”Schaffner” equipment at T
A
=
80
o
C:
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) NEGATIVETRANSIENTS
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).
VB024
3/8
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