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參數(shù)資料
| 型號： | VB027(011Y) |
| 廠商： | 意法半導體 |
| 英文描述： | HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| 中文描述： | 高壓點火線圈驅動功率集成電路 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 74K |
| 代理商： | VB027(011Y) |
4/9
VB027 / VB027(011Y) / VB027(012Y)
1
PRINCIPLE OF OPERATION
The
VB027, VB027(011Y), VB027(012Y)
is mainly
intended as high voltage power switch device driven by a
logic level input and interfaces directly to a high energy
electronic ignition coil.
The
VB027(012Y)
is fed from a low power signal generated
by an external controller that determines both dwell time
and ignition point. During V
high (
≥
4V) the
VB027,
VB027(011Y), VB027(012Y)
increases current in the
coil to the desired, internally set current level.
input
V
IN
of
the
VB027,
VB027(011Y),
When the collector current exceeds 4.5A, the diagnostic
signal is turned high and it remains so, until the load
current reaches 5.8A (second threshold). At that value,
the diagnostic signal is turned low, and the
μ
C forces the
V
IN
to the low state. During the coil currentswitch-off, the
primary voltage HV
C
is clamped by a series of Zener
diodes at an internally set value V
cl
, typically 360V.
The collector currentsensed throughthe R
sense
, is limited
thanks to the“Current limiter” blockthat, as soon as theI
cl
level is reached, forces the darlington (using the “Driver”
block) to limit the current provided.
The transition from saturation to desaturation, coil current
limiting phase, must have the ability to accommodate an
overvoltage. A maximum overshoot of 20V is allowed.
There can be some short period of time in which the
output pin (HV
C
) is pulled below ground by a negative
current
due
to
leakage
capacitances of the ignition coil. This can cause parasitic
glitches
on
the
diagnostic
VB027(011Y), VB027(012Y)
has a built-in protection
circuit that allows to lock thep-buried layerpotential of the
linear stage to the collector power, when the last one is
pulled underground.
FIGURE 1:
Application circuit
inductances
and
stray
output.
VB027,
THERMAL BEHAVIOUR
You can see in the block diagram of the
VB027,
VB027(011Y),
VB027(012Y)
overtemperature protection. The purpose of this circuit is
to shift the current level at which the first diagnostic is
activated down of about 1A.
a
box
called
This information can be managed by the micro that can
take the corrective action in order to reduce the power
dissipation. This block is not an effective protection but
just an overtemperature detection. The shift down of the
first flag level cannot be present for temperatures lower
than 125
°
C.
As an example of its behavior you can suppose a very
simple motor management system in which the micro
does just a simple arithmetic calculation to decide when to
switch-off the device after thefirst flag threshold.
EXAMPLE:
I
C(DIAG1)
info after x ms (I
C(DIAG1)
=2.5A)
I
switch-off
info after kx ms.
As soon as the temperature rises over the overtemp
threshold, the first diagnostic is shifted down to about
1.5A and, in this example, the switch-off current will be
kx*1.5 / 2.5.
OVERVOLTAGE
The
VB027,
withstand the following transients of the battery line:
-100V /2ms (R
i
=10
)
+100V /0.2ms (R
i
=10
)
+50V / 400ms (R
i
=4.2
,
with V
IN
=3V)
VB027(011Y),
VB027(012Y)
can
相關PDF資料 |
PDF描述 |
|---|---|
| VB027(012Y) | HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| VB027SP | HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| VB027BSP | HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| VB029(011Y) | Hook-Up Wire; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Color:Pink; Cable/Wire MIL SPEC:MIL-W-76C Type MW; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes RoHS Compliant: Yes |
| VB029012Y | HIGH VOLTAGE IGNITION COIL DRIVER POWER IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VB027012Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| VB0276E | 制造商:STMicroelectronics 功能描述: |
| VB027ASP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE IGNITION COIL DRIVER POWER IC |
| VB027BSP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C. |
| VB027SP | 功能描述:馬達/運動/點火控制器和驅動器 High Voltage Power RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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