The VB025BSPis a high voltage powerintegrated
circuit made using STMicroelectronics VIPower
Technology, with vertical current flow power
darlingtonandlogiclevelcompatibledrivingcircuit.
Built-in protection circuits for coil current limiting
andcollectorvoltageclamping allows the
VB025BSP 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
VB025BSP
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)
P
max
E
V
ESD
V
ESD
I
BD
V
T
T
(∗) With10 mils Alwire
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 V o lt age-0. 3 t o VCC+0.3V
in
Maximum In put C urrent100mA
in
Logic In put Fr eque nc y in O perative Mod eDC to 150Hz
in
Out put Volta ge Prima r y Threshold Cur rent Level-0. 3 t o VCC+0.3V
Flag Out put Cu rr ent100m A
Power Dissi pation (TC= 105oC)TB DW
Clampe d Ene r gy D ur in g Out put Power Clamping300mJ
s/b
ESD Voltage (HVC Pin)± 4KV
ESD Vo lt age (O t he r Pins)± 2KV
Input Darlington Base C ur re nt150m A
Input Darlington Base VoltageInt er na lly Limit edV
BD
Oper ating Junction Te mperature-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 note AN515/1094on VIPower data-book 1stedition.
Ther mal Res is tance Junct ion Case(MAX )1.2
Ther mal Res is tance Junct ion Heat sink w it h FR4(MAX )TB D (✭)
Lead Temp er a t ure During Sold er in g(MAX )TB D (✭)
o
C/W
o
C/W
o
C
2/7
CONNECTIONDIAGRAM
PIN FUNCTION
NoNAMEFUNCTION
1-5GNDEmitter Po wer Ground
6G NDControl Groun d (* )
7V
CC
8BDBase Da rlington
9I NP U TLogic I nput Channel ( I ntern al Pul l Dow n)
10FLAGDiagnos t ic O u t put S igna l (Op en E mit t er)
TABHVCPr ima r y Coil Output Driver (Open C oll ector)
Stand -by Sup ply CurrentIN = OFF10mA
DC L ogic C ur rentVb=16V Ic=6.5A f=100Hz
Peak DC Logic Cur re nt
During O n P hase
V
I
I
C(leak)
I
C(in fl)
DC Logic Voltage4.55.5V
CC
Coil Curr e nt Lim i t-40oC<Tj<125oC
cl
Outp ut leakage Curr e ntIN = OFFV
Collect or Current with
Float ing Input
T
Ic_ctr
Therm al Tem peratu r e
Outp ut Cur rent Control
V
V
High Level Input Volt a geVCC=4.5V4V
inH
Low Level Input V ol t ageVCC=5.5V-0.30.8V
inL
= 3.75 mH; unless otherwisespecified; seenote 1)
coil
= 6.5 A320380420V
coil
Ic=7.5A;Vin=4VTBDV
Load = C oilV
CC
=5.5V
Ic=7.5A(seefigure1)TBDmA
(see not e 2 and figure 1)
= 24V0.8mA
HVC
VCC= 5 VVBat = 13.5 V
=1KΩ;I np ut F loati ng
R
LOAD
OUT = ON(see fig ure 2 )150(*)
40mA
911A
0.8mA
CC
o
C
V
3/7
VB025BSP
ELECTRICAL CHARACTERISTICS (continued)
SymbolParameterTest Cond itionsMin.Typ.Max.Unit
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
Input T hresho ld
0.4V
Hysteresis
High Level Input Curre ntVin= 4 V100µ A
Low Level Input Cur rentVin=0.8V-100µA
Input A ctive Pull-DownVin= 4 V10100µA
High Level Flag Outpu t
Voltage
Low Level Flag O utput
Voltage
Coil Curr e nt Lev e 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)4.254.54.75A
V
-1V
CC
Threshold
Coil Curr e nt Lev e l
(see figure 3)
Threshold Drift
High Level Flag Outpu t
IC>I
diagTH
V
=3V0.5TBDmA
diag
Current
Leakage Cu rrent O n Fla g
Vin=LOWVCC= 5.5V10µA
Output
Antiparallel Diode
F
Ic=-1A2V
Forward Voltage
Single P u ls e Ava lanche
s/b
Energy
Turn-o n Delay Tim e of
Coil Curre nt
Turn-off Delay Time of
Coil Curre nt
must bemeasured 1ms after desaturation of the power stage.
cl
L=6mHIC=8A
(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
0.5V
V
PRINCIPLEOF OPERATION
The VB025BSP is mainly intended as a high
voltage power switch device driven by a logic
level input and interfacesdirectly to a high energy
electronicignition coil.
The input Vin of the VB025BSPis fed from a low
power signal generated by an external controller
that determinesboth dwell time and ignitionpoint.
During Vin high (≥ 4V) the VB025BSP 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
4/7
voltage HVc is clamped at an internally set value
Vcl, typically380V.
The transition fromsaturation to desaturation,coil
current limiting phase, must have the ability to
accomodateanovervoltage.Amaximum
overshootof 20V is allowed.
FEEDBACK
When the collector current exceeds 4.5A, the
feedback signal is turned high and it remains so,
until the input voltage is turned-off.
OVERVOLTAGE
The VB025BSP can withstand the following
transientsof the batteryline:
-100V/2msec(R
+100V/0.2msec(R
+50V/400msec(R
=10Ω)
i
=10Ω)
i
= 4.2 Ω,with VIN=3V)
i
VB025BSP
Fig. 1 Main WaveformsDuring On PhaseFig. 2 OutputCurrent Waveform After Thermal
ProtectionActivation
FIG.4 Single Pulse Typical Es/bCurveFig. 3 FlagCurrent Versus Temperature
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