VB027(6)-11-E STMicroelectronics, VB027(6)-11-E Datasheet - Page 3

• Manufacturer Part Number: VB027(6)-11-E
• Description: IC DVR PWR COIL 300V PENTAWATTHV
• Manufacturer: STMicroelectronics
• Series: VIPower™r

Specifications of VB027(6)-11-E

• Current - Output: 9A
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Through Hole
• Package / Case: Pentawatt-5 HV (Bent and Staggered Leads)
• Product: Electronic Ignition Drivers
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Applications: -
• Number Of Outputs: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Its main features are:
- minimum external components required
- coil current limit internally set
- built-in collector-emitter voltage clamping
- TTL/CMOS compatible input
- output diagnostic to microprocessor for
angle control and overtemperature protection
- die-size compatible with TO-220 package.
The input V
signal generated by an external controller that
determines both dwell time and ignition point.
During V
VB027 is turned on and the current in the primary of
the ignition coil increases until it reaches the internally
Figure 3. Normal operating cycle
Figure 4. Primary voltage limitation
in
high, Figure 3, the power output of the
in
of the VB027 is fed by a low power
I
coil
V
in
V
flag
dwell
V
clamp
set maximum current level.
The device then regulates the output current in a
stable dwell regulation loop through an internal
sensing resistor.
A voltage signal is generated on the diagnostic output
to inform the micro-controller of the primary coil
current level. The diagnostic signal goes high typically
when the coil current exceeds 4.5A, and low when it
exceeds 5.8A. This information allows the micro-
controller to govern the dwell angle and to detect coil
saturation. The spark is generated by turning off the
device, which is under the control of the micro-
controller through the diagnostic line. An internal
clamping device ensures that the voltage on the
primary output is limited typically to 360V, even in
case of spark plug disconnection: see Figure 4.
I
coil
APPLICATION NOTE
3/7