VB026SP
HIGH VOLTAGE IGNITION COIL DRIVER
POWER IC
s
PRIMARY COIL VOLTAGE INTERNALLY SET
s
COIL CURRENT LIMIT INTERNALLY SET
s
LOGIC LEVEL COMPATIBLE INPUT
s
DRIVING CURRENT QUASI
PROPORTIONAL TO COLLECTOR
CURRENT
s
SINGLE FLAG-ON COIL CURRENT
DESCRIPTION
The VB026SP is a high voltage power integrated
circuit made using STMicroelectronics VIPower
Technology, with vertical current flow power
darlington and logic level compatible driving circuit.
Built-in protection circuits for coil current limiting
and
collector
voltage
clamping
allows
the
VB026SP to be used as a smart, high voltage,
high current interface in advanced electronic
ignition systems.
March 1999
BLOCK DIAGRAM
T YPE
V
c l
I
cl
I
d
VB026SP
360 V
9 A
100 mA
1
10
PowerSO-10
1/7
ABSOLUTE MAXIMUM RATING
Symb ol
Parameter
Value
Uni t
HV
C
Collector Voltage (Int ernally Limited)
-0. 3 t o V
cl amp
V
I
C
Collector Current (Internally Limit ed)
10
A
I
C(gn d)
DC Current on Emitt er Power
10.5 (*)
A
V
CC
Driving Stage Supply Voltage
-0.3 to 7
V
I
s
Driving Circuitry Supply Current
200
mA
I
s(gnd )
DC Current on Ground Pin
1
A
V
i n
Input Voltage
-0. 3 t o V
CC
+ 0. 3
V
I
in
Maximum Input Current
100
mA
f
in
Logic Input Frequency in O perative Mode
DC to 150
Hz
V
out(fl ag)
Output Voltage Primary Threshold Current Level
-0. 3 t o V
CC
+ 0. 3
V
I
out(f lag)
Flag Out put Current
100
mA
I
BD
Input Darlingt on Base Current
150
mA
V
BD
Input Darlingt on Base Volt age
Int ernally Limited
V
P
max
Power Dissipat ion (T
C
= 105
o
C)
T BD
W
E
s/ b
Clamped Energy During Output Power Clamping
300
mJ
V
ESD
ESD Voltage (HVC Pin)
4
KV
V
ESD
ESD Voltage (O ther Pins)
2
KV
T
j
Operat ing Junction Temperature
-40 to 150
o
C
T
s tg
St orage Temperature Range
-55 to 150
o
C
(*) With 10 mils Al wire
THERMAL DATA
R
t hj-ca se
Thermal Resistance Junct ion Case
(MAX)
1.2
o
C/W
R
thj-h
Thermal Resistance Junct ion Heatsink with FR4
(MAX)
TBD (*)
o
C/W
T
sold
Lead T emperature During Soldering
(MAX)
TBD (*)
o
C
(*) see application note AN515 on VIPower databook 1
st
edition
VB026SP
2/7
CONNECTION DIAGRAM
PIN FUNCTION
No
NAME
F UNCTIO N
1-5
GND
Emitt er Power Ground
6
GND
Cont rol G round (*)
7
V
CC
Logic Supply Volt age
8
BD
Base Darlingt on
9
I NPUT
Logic Input Channel (Int ernal Pull-down)
10
FLAG
Diagnostic Output Signal (Open Emitter)
TAB
HVC
Primary Coil Out put Driver (Open Collect or)
(*) Pin 6 must be connected to pins 1-5 externally
ELECTRICAL CHARACTERISTICS (5.3V < V
b
< 24V; V
CC
= 5 V
10%; -40
o
C < T
j
< 125
o
C;
R
coil
= 580 m
; L
coil
= 3.75 mH; unless otherwise specified; see note 1)
Symbol
Parameter
Test Cond iti ons
Min.
Typ.
Max.
Un it
V
cl
High Volt age Clamp
I
coil
= 6. 5 A
320
360
420
V
V
ce (sat)
Saturation Voltage of The
Power Stage
I
c
= 6.5A;
V
in
= 4V
1.5
2
V
I
d(s tdby)
St and-by Supply Current
IN = OF F
10
mA
I
CC
DC Logic Current
V
b
= 16 V
I
c
= 6.5 A f = 100 Hz
Load = Coil
V
CC
= 5. 5V
40
mA
I
CC(pea k)
Peak DC Logic Current
During On Phase
I
c
= 6.5 A
(see figure 1)
100
150
mA
V
CC
DC Logic Volt age
4.5
5. 5
V
I
c l
Coil Current Limit
-40
o
C < T
j
< 125
o
C
(see not e 2 and f igure 1)
8. 25
10
A
I
c( le ak)
Output leakage Current
IN = OF F
V
HVC
= 24V
0. 8
mA
I
C(inf l)
Collector Current with
Float ing Input
VCC = 5 V
VBat = 13. 5 V
R
LOAD
= 1K
;
Input Floating
0. 8
mA
T
sh dw
Thermal Temperature
Output Current Cont rol
OUT = ON (see figure 2)
150
(*)
o
C
VB026SP
3/7
Symbol
Parameter
Test Cond iti ons
Min.
Typ.
Max.
Un it
V
inH
High Level Input Voltage
V
CC
= 4.5V
4
V
CC
V
V
in L
Low Level Input Voltage
V
CC
= 5.5V
-0. 3
0. 8
V
V
i n(h ys )
Input Threshold
Hysteresis
0.4
V
I
in H
High Level Input Current
V
in
= 4 V
100
A
I
inL
Low Level Input Current
V
in
= 0. 8 V
-100
A
I
in pd
Input Act ive Pull-Down
V
in
= 4 V
10
100
A
V
di agH
High Level Flag O utput
Voltage
R
EXT
= 22 K
C
EXT
= 1 nF
(see not e 3)
V
CC
-1
V
CC
V
V
di agL
Low Level Flag O utput
Voltage
R
EXT
= 22 K
C
EXT
= 1 nF
(see not e 3)
0. 5
V
I
d iagTH
Coil Current Level
Threshold
T
j
= 25
o
C
(see f igure 1)
6. 15
6.5
6.85
A
I
d iagTD
Coil Current Level
Threshold Drift
(see figure 3)
I
d iag
High Level Flag O utput
Current
I
C
> I
diagTH
V
di ag
= 3V
0.5
T BD
mA
I
dia g(l eak)
Leakage Current O n Flag
Output
V
in
= LO W
V
CC
= 5.5V
10
A
V
F
Antiparallel Diode
Forward Voltage
I
c
= -1 A
2
V
E
s/ b
Single Pulse Avalanche
Energy
I
C
= 8A
L
C
= 6 mH
(see figure 4)
180
mJ
t
pHL
Turn-on Delay Time of
Coil Current
R
c
= 0.5
L
c
= 3.75 mH
(see figure 5)
T BD
s
t
pLH
Turn-off Delay Time of
Coil Current
R
c
= 0.5
L
c
= 3.75 mH I
c
= 6.5A
(see figure 5)
T BD
s
Note 1: Parametric degradation are allowed with 5.3 < V
b
< 10V and V
b
> 24V.
Note 2: The primary coil current value I
cl
must be measured 1ms after desaturation of the power stage.
Note 3: No Internal Pull-Down
(*) Internally limited
ELECTRICAL CHARACTERISTICS (continued)
PRINCIPLE OF OPERATION
The VB026SP is mainly intended as a high
voltage power switch device driven by a logic
level input and interfaces directly to a high energy
electronic ignition coil.
The input Vin of the VB026SP is fed from a low
power signal generated by an external controller
that determines both dwell time and ignition point.
During Vin high (
4V) the VB026SP increases
current in the coil to the desired, internally set
current level.
After reaching this level, the coil current remains
constant until the ignition point, that corresponds
to the transition of Vin from high to low (typ. 1.9V
threshold).
During the coil current switch-off, the primary
voltage HVc is clamped at an internally set value
Vcl, typically 360V.
The transition from saturation to desaturation, coil
current limiting phase, must have the ability to
accomodate
an
overvoltage.
A
maximum
overshoot of 20V is allowed.
FEEDBACK
When the collector current exceeds 6.5A, the
feedback signal is turned high and it remains so,
until the input voltage is turned-off.
OVERVOLTAGE
The VB026SP can
withstand the
following
transients of the battery line:
-100V/2msec (R
i
= 10
)
+100V/0.2msec (R
i
= 10
)
+50V/400msec (R
i
= 4.2
, with V
IN
= 3 V)
VB026SP
4/7
FIG. 4 Single Pulse Typical Es/b Curve
Fig. 3 Flag Current Versus Temperature
FIG. 5 Propagation Times Definitions.
10 %
50 %
10 %
200 V
t
t
pHL
pLH
INPUT
HVC
SC10930
Fig. 1 Main Waveforms During On Phase
Fig. 2 Output Current Waveform After Thermal
Protection Activation
VB026SP
5/7
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