VB025BSP
HIGH VOLTAGE IGNITION COIL DRIVER
POWER IC
■PRIMARYCOIL VOLTAGEINTERNALLY SET
■COIL CURRENT LIMITINTERNALLY SET
■LOGIC LEVELCOMPATIBLE INPUT
■DRIVING CURRENT QUASI
PROPORTIONALTO COLLECTOR
CURRENT
■SINGLE FLAG-ONCOIL CURRENT
DESCRIPTION
The VB025BSPis a high voltage power integrated
circuit made using STMicroelectronics VIPower
Technology, with vertical current flow power
darlingtonand logiclevelcompatibledriving circuit.
Built-in protection circuits for coil current limiting
and collector voltage clamping allows the
VB025BSP to be used as a smart, high voltage,
high current interface in advanced electronic
ignition systems.
March 1999
BLOCK DIAGRAM
TYPE Vcl Icl Id
VB025BSP 380 V 9 A 100 mA
1
10
PowerSO-10
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ABSOLUTE MAXIMUM RATING
Symbol Parameter Value Unit
HVCCollector Voltage (Internally Limited) -0.3 to Vclamp V
ICCollector Current (Internally Limited) 10 A
IC(gnd) DC Current on Emitter Power ±10.5 (∗)A
V
CC Driving Stage Supply Voltage -0.3 to 7 V
IsDriving Circuitry Supply Current ±200 mA
Is(gnd) DC Current on Ground Pin ±1A
V
in Input Voltage -0.3 to VCC +0.3 V
I
in Maximum Input Current 100 mA
fin Logic Input Frequency in Operative Mode DC to 150 Hz
Vout(flag) Output Voltage Primary Threshold Current Level -0.3 to VCC +0.3 V
I
out(flag) Flag Output Current 100 mA
Pmax Power Dissipation (TC= 105 oC) TBD W
Es/b Clamped Energy During Output Power Clamping 300 mJ
VESD ESD Voltage (HVC Pin) ±4KV
V
ESD ESD Voltage (Other Pins) ±2KV
I
BD Input Darlington Base Current 150 mA
VBD Input Darlington Base Voltage Internally Limited V
TjOperating Junction Temperature -40 to 150 oC
Tstg Storage Temperature Range -55 to 150 oC
(∗) With10 mils Alwire
THERMAL DATA
Rthj-case Thermal Resistance Junction Case (MAX) 1.2 oC/W
Rthj-h Thermal Resistance Junction Heatsink with FR4 (MAX) TBD (✭)oC/W
Tsold Lead Temperature During Soldering (MAX) TBD (✭)oC
(✭) see application note AN515/1094on VIPower data-book 1st edition.
VB025BSP
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CONNECTION DIAGRAM
PIN FUNCTION
No NAME FUNCTION
1-5 GND Emitter Power Ground
6 GND Control Ground (*)
7V
CC Logic Supply Voltage
8 BD Base Darlington
9 INPUT Logic Input Channel (Internal Pull Down)
10 FLAG Diagnostic Output Signal (Open Emitter)
TAB HVC Primary Coil Output Driver (Open Collector)
(*) Pin 6must beconnected to pins1-5 externally
ELECTRICAL CHARACTERISTICS (5.3V <Vb< 24V; VCC =5V±10%; -40oC<T
j<125oC;
Rcoil =580 mΩ;L
coil = 3.75 mH; unless otherwise specified;seenote 1)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
Vcl High Voltage Clamp Icoil = 6.5 A 320 380 420 V
Vce(sat) Saturation Voltage of The
Power Stage Ic=7.5A; V
in =4V TBD V
I
CC(stdby) Stand-by Supply Current IN = OFF 10 mA
ICC DC Logic Current Vb=16V I
c=6.5A f=100Hz
Load = Coil VCC =5.5V 40 mA
ICC(peak) Peak DC Logic Current
During On Phase Ic=7.5A (seefigure1) TBD mA
V
CC DC Logic Voltage 4.5 5.5 V
Icl Coil Current Limit -40oC<T
j<125
o
C
(see note 2 and figure 1) 911A
I
C(leak) Output leakage Current IN = OFF VHVC = 24V 0.8 mA
IC(infl) Collector Current with
Floating Input VCC = 5 V VBat = 13.5 V
RLOAD =1KΩ; Input Floating 0.8 mA
TIc_ctr Thermal Temperature
Output Current Control OUT = ON (see figure 2) 150 (*) oC
VinH High Level Input Voltage VCC =4.5V 4 V
CC V
VinL Low Level Input Voltage VCC =5.5V -0.3 0.8 V
VB025BSP
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Symbol Parameter Test Conditions Min. Typ. Max. Unit
Vin(hys) Input Threshold
Hysteresis 0.4 V
IinH High Level Input Current Vin = 4 V 100 µA
IinL Low Level Input Current Vin =0.8V -100 µA
I
inpd Input Active Pull-Down Vin = 4 V 10 100 µA
VdiagH High Level Flag Output
Voltage REXT =22KΩC
EXT =1nF
(see note 3) VCC-1 VCC V
VdiagL Low Level Flag Output
Voltage REXT =22KΩC
EXT =1nF
(see note 3) 0.5 V
IdiagTH Coil Current Level
Threshold Tj=25
o
C (see figure 1) 4.25 4.5 4.75 A
IdiagTD Coil Current Level
Threshold Drift (see figure 3)
Idiag High Level Flag Output
Current IC>I
diagTH Vdiag =3V 0.5 TBD mA
I
diag(leak) Leakage Current On Flag
Output Vin =LOW V
CC = 5.5V 10 µA
VFAntiparallel Diode
Forward Voltage Ic=-1A 2 V
E
s/b Single Pulse Avalanche
Energy L=6mH I
C=8A
(see figure 4) 180 mJ
tpHL Turn-on Delay Time of
Coil Current Rc=0.5ΩL
c=3.75mH
(see figure 5) TBD µs
tpLH Turn-off Delay Time of
Coil Current Rc=0.5ΩL
c=3.75mH I
c=6.5A
(see figure 5) TBD µs
Note 1: Parametric degradation are allowed with 5.3 < Vb< 10V and Vb> 24V.
Note 2: Theprimary coil current value Icl 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 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 VB025BSP is fed from a low
power signal generated by an external controller
that determinesboth dwell time and ignition point.
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 transitionof 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, typically380V.
The transitionfrom saturation to desaturation,coil
current limiting phase, must have the ability to
accomodate an overvoltage. A maximum
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 battery line:
-100V/2msec(Ri=10Ω)
+100V/0.2msec(Ri=10Ω)
+50V/400msec(Ri= 4.2 Ω, with VIN =3V)
VB025BSP
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FIG.4 SinglePulse Typical Es/b CurveFig. 3 FlagCurrent Versus Temperature
FIG. 5 PropagationTimes Definitions.
10 %
50 %
10 %
200 V
tt
pHL pLH
INPUT
HVC
SC10930
Fig. 1 Main WaveformsDuring On Phase Fig. 2 OutputCurrent Waveform After Thermal
ProtectionActivation
VB025BSP
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DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.35 3.65 0.132 0.144
A1 0.00 0.10 0.000 0.004
B 0.40 0.60 0.016 0.024
c 0.35 0.55 0.013 0.022
D 9.40 9.60 0.370 0.378
D1 7.40 7.60 0.291 0.300
E 9.30 9.50 0.366 0.374
E1 7.20 7.40 0.283 0.291
E2 7.20 7.60 0.283 0.300
E3 6.10 6.35 0.240 0.250
E4 5.90 6.10 0.232 0.240
e 1.27 0.050
F 1.25 1.35 0.049 0.053
H 13.80 14.40 0.543 0.567
h 0.50 0.002
L 1.20 1.80 0.047 0.071
q 1.70 0.067
α0o8o
DETAIL”A”
PLANE
SEATING
α
L
A1
F
A1
h
A
D
D1
==
==
==
E4
0.10 A
E1E3
C
Q
A
==
B
B
DETAIL”A”
SEATING
PLANE
==
==
E2
610
51
eB
HE
M
0.25
==
==
0068039-C
PowerSO-10 MECHANICAL DATA
VB025BSP
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VB025BSP
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