VB026BSP データシートの表示（PDF） - STMicroelectronics
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VB026BSP Datasheet PDF : 7 Pages
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VB026BSP
ELECTRICAL CHARACTERISTICS (continued)
Sy mb o l
Parameter
Test Conditions
Min.
Vin(h ys ) Input Threshold
0.4
Hysteresis
Iin H
High Level Input Current Vin = 4 V
IinL
Low Level Input Current Vin = 0.8 V
Iin pd Input Act ive Pull-Down
Vin = 4 V
10
VdiagH High Level Flag Output
Vo lt a ge
REXT = 22 KΩ CEXT = 1 nF
(see note 3)
V CC -1
VdiagL
Id iagTH
Low Level Flag Output
Vo lt a ge
Coil Current Level
T hr es h o ld
REXT = 22 KΩ CEXT = 1 nF
(see note 3)
Tj = 25oC (see figure 1)
6.15
IdiagTD Coil Current Level
Threshold Drift
(see figure 3)
Idiag High Level Flag Output
IC > IdiagTH Vdiag = 3V
0.5
Current
Idia g(leak) Leakage Current O n Flag Vin = LO W VCC = 5.5V
Ou t p ut
VF
Antiparallel Diode
Forward Voltage
Ic = -1 A
Es/b Single Pulse Avalanche IC = 8A LC = 6 mH
180
En e rgy
(see figure 4)
tpHL Turn-on Delay Time of
Coil Current
Rc = 0.5 Ω Lc = 3.75 mH
(see figure 5)
tpLH Turn-off Delay Time of
Coil Current
Rc = 0.5 Ω Lc = 3.75 mH Ic = 6.5A
(see figure 5)
Note 1: Parametric degradation are allowed with 5.3 < Vb < 10V and Vb > 24V.
Note 2: The primary coil current value Icl must be measured 1ms after desaturation of the power stage.
Note 3: No Internal Pull-Down
(*) Internally limited
Typ.
6.5
TBD
TBD
TBD
Max.
100
-100
100
VCC
0.5
6.85
10
2
Un it
V
µA
µA
µA
V
V
A
mA
µA
V
mJ
µs
µs
PRINCIPLE OF OPERATION
The VB026BSP 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 VB026BSP 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 VB026BSP 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, 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 VB026BSP can withstand the following
transients of the battery line:
-100V/2msec (Ri = 10 Ω)
+100V/0.2msec (Ri = 10 Ω)
+50V/400msec (Ri = 4.2 Ω, with VIN = 3 V)
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