The VB026SP is a high voltage power integrated
circuit made using STMicroelectronics VIPower
Technology, with vertical current flow power
darlingtonandlogiclevelcompatibledrivingcircuit.
Built-in protection circuits for coil current limiting
andcollectorvoltageclamping allows the
VB026SP to be used as a smart, high voltage,
high current interface in advanced electronic
ignition systems.
BLOCK DIAGRAM
10
1
PowerSO-10
March 1999
1/7
VB026SP
ABSOLUTEMAXIMUMRATING
SymbolPara met e rVal u eUni t
HV
I
I
C(gnd)
V
I
I
s(gnd)
V
I
f
V
out(flag)
I
out(flag)
I
BD
V
P
max
E
V
ESD
V
ESD
T
T
(*) With 10 mils Al wire
Collec t or Voltage ( I nternally Limi t ed )-0. 3 t o V
C
Collec t or Current (I n t ernally Li m ited)10A
C
clamp
DC C ur rent on Emitter Powe r± 10.5 (*)A
Driving Stage Supply V oltage-0.3 to 7V
CC
Driving C ir c uit r y Supply Current± 200mA
s
DC C ur rent on Groun d P in± 1A
Input Voltage-0. 3 t o VCC+0.3V
in
Maximum I nput C urrent100mA
in
Logic In put Fr eque nc y in O perative ModeDC to 150Hz
in
Out put Volta ge Prima r y T h r es hold Current Level-0. 3 t o VCC+0.3V
Flag Out put Cu rr ent100m A
Input Darlington Bas e C urrent150m A
Input Darlington Bas e V oltageInt er na lly Limit edV
BD
Power Dissi pation (TC= 105oC)TB DW
Clampe d Ene r gy D ur in g Out put Power Clampin g300mJ
s/b
ESD Voltage (HVC Pin)± 4KV
ESD Voltage (O ther Pins)± 2KV
Oper ating Junction Temperat ure-40 to 150
j
St orage Temperatur e Range-55 to 150
stg
V
o
C
o
C
THERMALDATA
R
thj-case
R
thj-h
T
sold
(*) see application noteAN515 on VIPower databook 1stedition
Ther mal Res is t an ce Junction Case(MAX )1.2
Ther mal Res is t an ce Junction Heats i nk wit h FR4(MA X)TBD (*)
Lead Tempera tur e Durin g Soldering(MA X)TB D (*)
o
C/W
o
C/W
o
C
2/7
CONNECTIONDIAGRAM
PIN FUNCTION
NoNAMEFUNCTION
1-5GNDEmitter Po wer G r ound
6G NDControl Ground (*)
7V
CC
8BDBase Da rl ington
9I NP U TLogi c Inp ut Channel (I nternal P ul l- do wn)
10FLAGDiagnost ic O u t pu t Signa l (Op en E m it t e r)
TABHVCPrimary Coil Output Driv er (Ope n Coll ector)
Stand -by Sup ply CurrentIN = OFF10mA
DC L ogic CurrentVb=16V Ic=6.5A f=100Hz
Peak DC Lo gic Current
During On Phase
V
I
I
c( le ak)
I
C(in fl)
DC Logic Voltage4.55.5V
CC
Coil Cur rent Limi t-40oC<Tj<125oC
cl
Outp ut l eak age C ur rentIN = OFFV
Collect or Current with
Float ing Input
T
shdw
Therm al Tem peratu r e
Outp ut C urrent Control
= 3.75 mH; unless otherwisespecified; seenote 1)
coil
= 6.5 A320360420V
coil
Ic=6.5A;Vin=4V1.52V
Load = C oilV
CC
=5.5V
Ic= 6. 5 A (se e f i gur e 1)100150mA
(see not e 2 and figure 1)
= 24V0.8mA
HVC
VCC = 5 VVB at = 13. 5 V
=1KΩ;Inp ut F loati ng
R
LOAD
OUT = O N (see figure 2 )150(*)
40mA
8.2510A
0.8mA
o
C
3/7
VB026SP
ELECTRICAL CHARACTERISTICS (continued)
SymbolParameterTest Cond itionsMin.Typ.Max.Unit
V
V
V
in(hys)
I
inH
I
inL
I
inpd
V
diagH
V
diagL
I
diagTH
I
diagTD
I
diag
I
diag(leak)
V
E
t
pHL
t
pLH
Note 1: Parametricdegradation are allowed with 5.3 < Vb< 10V and Vb> 24V.
Note 2: Theprimary coil current value I
Note 3: No Internal Pull-Down
(*) Internally limited
High Lev e l Input V olt a geVCC=4.5V4V
inH
Low Lev e l Input Vol t ag eVCC=5.5V-0.30.8V
inL
Input Thr esho ld
0.4V
Hysteresis
High Lev e l Input Cur rentVin= 4 V100µA
Low Lev e l Input Curr entVin=0.8V-100µA
Input Act ive Pull- D ownVin= 4 V10100µA
High Lev e l Flag Out put
Voltage
Low Lev e l Flag Outp ut
Voltage
Coil Cur rent Leve l
=22KΩ C
R
EXT
EXT
=1nF
(see not e 3)
=22KΩ C
R
EXT
EXT
=1nF
(see not e 3)
Tj=25oC (see figure 1)6.156.56.8 5A
V
-1V
CC
Threshold
Coil Cur rent Leve l
(see figure 3)
Threshold Drift
High Lev e l Flag Out put
IC>I
diagTHVdiag
=3V0.5TBDmA
Current
Leakage Cu rrent O n Fla g
Vin=LOW VCC= 5.5V10µA
Output
Antiparallel Diode
F
Ic=-1A2V
Forward Voltage
Single Pulse Avalanche
s/b
Energy
Turn-o n Delay Tim e of
Coil Curre nt
Turn-off Delay Tim e of
Coil Curre nt
must bemeasured 1ms after desaturation of the power stage.
cl
IC=8ALC=6mH
(see figure 4)
=0.5Ω Lc=3.75mH
R
c
(see figure 5)
=0.5Ω Lc=3.75mH Ic=6.5A
R
c
(see figure 5)
180mJ
TBDµs
TBDµs
CC
CC
0.5V
V
V
PRINCIPLEOF OPERATION
The VB026SP is mainly intended as a high
voltage power switch device driven by a logic
levelinput and interfaces directly to a high energy
electronicignitioncoil.
The input Vin of the VB026SP is fed from a low
power signal generated by an external controller
that determinesboth dwelltime and ignition point.
During Vin high (≥ 4V) the VB026SP increases
current in the coil to the desired, internally set
currentlevel.
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
4/7
voltage HVc is clampedat an internally set value
Vcl, typically360V.
The transitionfrom saturation to desaturation,coil
current limiting phase, must have the ability to
accomodateanovervoltage.Amaximum
overshootof 20V is allowed.
FEEDBACK
When the collector current exceeds 6.5A, the
feedback signal is turned high and it remains so,
untilthe input voltage isturned-off.
OVERVOLTAGE
The VB026SP can withstand the following
transientsof the battery line:
-100V/2msec(R
+100V/0.2msec(R
+50V/400msec(R
=10Ω)
i
=10Ω)
i
=4.2 Ω, with VIN=3V)
i
VB026SP
Fig. 1 Main WaveformsDuring On PhaseFig. 2 Output Current WaveformAfter Thermal
ProtectionActivation
FIG.4 Single PulseTypicalEs/b CurveFig. 3 FlagCurrent Versus Temperature
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