SGS Thomson Microelectronics VB024 Datasheet

VB024
HIGH VOLTAGE IGNITION COIL DRIVER
POWER IC
TYPE V
VB024 400 V 8 A 100 mA
PRIMAR YCOILCURR E NTINTERN A LL Y SET
PRIMARY COIL VOLTAGE INTERNALLY SET
AUTOMATIC SHUT-OFF ATMAX CURRENT
LOGIC LEVEL COMPATIBLE INPUT
DIGITAL SIGNAL FEEDBACK TO INDICATE
CL
I
C
I
d
DESCRIPTION
The VB024 is a high voltage integrated circuit made using SGS-THOMSON VIPower thecnology, with vertical current flow power darlington and logic level compatible drivingcircuit.
The device performs the following functions: power stage for driving the primary side of the ignition coil, digital signal feedback to the control IC to indicate a predetermined current level, automatic shut-off at maximum current, self clamping for voltage flyback and logic level input.
BLOCK DIAGRAM
ISOWATT7
September 1993
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VB024
ABSOLUTE MAXIMUM RATING
Symbol Parameter Value Uni t
HV
I
V
I
V
V
I
T
T
THERMAL DATA
R
thj-case
R
thj-amb
CONNECTION DIAGRAM
Collector V olt age Internally Limited V
C
Collector Cur r en t Int ernally Lim i te d A
C
Driving St age Supply Volta ge 16 V
d
Driving Circuitry Su pply Current 600 mA
d
Maximum Input V olt age 10 V
in
Contr ol Circuitry Supply V olt age 8 V
s
Control Circuitry Supply Current 200 mA
s
Oper at ing Junction Tem pe r at ur e -40 to 150
j
St or a ge T emperature Ran ge -55 to 150
stg
Thermal R esis t ance Junc t ion Case (MA X) 2.5 Thermal Resistance Junction Ambient (MAX) 30
o o
o
C/W
o
C/W
C C
PIN FUNCTION
No NAME FUNCTI O N
1 GND Emit ter Power and Cont r o l Ground 2 LAT C H ENABLE Enable s Of The Lat ch Circ uitry W hich T ur n Of f The Driver 3 Vd Supply Volta ge For The Powe r S t age 4 OUT Out put to T h e Pri mar y Coil 5 Vs Supply V olt age For The Contr ol Stage 6INPUT 7 FLAG Out put of A Logic S ig nal When Ic Is Gr eat er Than 3 A
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VB024
ELECTRICAL CHARACTERISTICS (Vb=12V;Vs= 5 V Regulated;Tj=25oC; R
L
= 6mH unless otherwise specified)
coil
Symbol Parameter Test C onditi ons Mi n. Typ. Max. Unit
V
V
ce(sat)
I
s(on)
V
I
d(on)
V
I
diag
V
V
I
inH
V V
neg
V
I
c(max)
t
V
diagH
V
diagL
Note 1: Ti me f r on i nput switching V
High Voltage Clam p Vin=0.4V -40oCTj≤125oC320 510V
cl
Sat uration Voltage of The Power Stage
Contr ol Circuit Supply Current
Contr ol Circuit Supply
s
Volt age Driver Stage S tand-by
Current Driver Stage S upply
d
Volt age Diagnostic Current at
Wic h The Flag Switches High Lev e l Input Voltage 4 5.5 V
inH
Low Lev e l Input Voltage 0 0.2 V
inL
High Lev e l Input Curr ent Vin=5.5V 20 600 µA Positive T hreshold 2.8 3.2 V
pos
Negative T hr eshold 1.3 1.7 V Hyst eresis Voltage 1.3 1.7 V
hys
Turn-Of f Current Vin=4V -40oCTj≤125oC7.3 8.8A Switc h-Off Ti me Ic=6A(seenote1) 10 80 µs
off
High Lev e l Diagnostic Output Voltage
Low Lev e l D ia gnostic Output Volatge
neg
Ic=6A; Id=80mA; Vin=4V 2 V
4.5 5.5 V
Vin=4V 180 mA
5.5 16 V
-40oC Tj≤ 125oC 2.75 3 .35 mA
R
=20K 44.5V
flag
R
= 100 K 0.1 V
flag
until VCLdrops t o 200 V
=500 m;
coil
15 mA
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
, the output stage
c(max)
will Shut-off causing the spark to occour.
The VB024 is also internally clamped to protect it from the flyback voltage of the primary inductance as the output stage is turned off.
OVERVOLTAGE
The VB024 withstand the following transient test performed using a ”Schaffner” equipment at TA= 80oC:
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).
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VB024
FIGURE1: Application Circut
FIGURE2: Switching Waveforms
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FIGURE 3: Load Dump Test Circut
VB024
FIGURE 4: Load Dump Input Waveform
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VB024
FIGURE 5: Negative Transients Test Circut
FIGURE 6: Reverse Battery Test Circuit
(*) T his resi stor represents v ehicle wiring harness r esistance
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ISOWATT7 MECHANICAL DATA
VB024
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
mm inch
A 5.35 5.65 0.210 0.222 B 3.4 3.7 0.133 0.145 C 0.8 1.28 0.031 0.050 D 2.95 3.1 0.116 0.122
D1 1.95 2.15 0.076 0.084
E 0.5 0.6 0.019 0.023
F 1.1 0.043 F1 0.7 0.8 0.027 0.031 F2 1.4 0.055
G 4.88 5.28 0.192 0.207 G1 7.42 7.82 0.292 0.308 G2 9.96 10.36 0.392 0.408
H 15.9 16.1 0.626 0.634
L1 19.85 20.15 0.781 0.793 L2 19.35 19.65 0.761 0.773 L3 8.9 9.1 0.350 0.358 L4 28 29 1.102 1.141 L5 4.9 5.1 0.193 0.201 L6 15.9 16.1 0.626 0.634 L7 2.1 2.3 0.082 0.090 L8 23 23.4 0.905 0.921
L9 24.8 25.2 0.976 0.992 L10 19.8 20.2 0.779 0.795 L11 17.7 18.3 0.697 0.720
M 7.83 8.33 0.308 0.328
N 2.75 3.25 0.108 0.128 3.5 3.7 0.138 0.145
L9
L10 L11
A
B
C
L3
Ø
H
Dia.
L5 L6
D
L2
L1
L8
L4
D1
E
M
N
F2
F1
==
==
=G=
=G1 =
= G2 =
F
L7
P033B
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VB024
Information furnished is believed to be accurate and reliable.However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information norfor any infringement of patents or other rights of third parties which may results from its use. No license isgranted byimplication orotherwise underany patentor patentrights ofSGS-THOMSON Microelectronics. Specificationsmentioned in this publication are subject to change without notice. This publication supersedes andreplaces all information previously supplied. SGS-THOMSON Microelectronicsproducts are notauthorized foruse ascritical componentsinlife supportdevices or systemswithoutexpress written approvalof SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics- All Rights Reserved
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