Symbol

Parameter

Test Cond iti ons

Min.

Typ.

Max.

Un it

Input Threshold

Hysteresis

0.4

V

High Level Input Current

100

µA

Low Level Input Current

-100

µA

Input Act ive Pull-Down

10

100

µA

High Level Flag O utput

Voltage

Ω

(see not e 3)

V

Low Level Flag O utput

Voltage

Ω

(see not e 3)

0. 5

V

Coil Current Level

Threshold

6. 15

6.5

6.85

A

Coil Current Level

Threshold Drift

(see figure 3)

High Level Flag O utput

Current

0.5

T BD

mA

Leakage Current O n Flag

Output

10

µA

Antiparallel Diode

Forward Voltage

2

V

Single Pulse Avalanche

Energy

(see figure 4)

180

mJ

Turn-on Delay Time of

Coil Current

(see figure 5)

TBD

µs

Turn-off Delay Time of

Coil Current

(see figure 5)

TBD

µs

Note 3: No Internal Pull-Down

(*) Internally limited

ELECTRICAL CHARACTERISTICS (continued)

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

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:

Ω)

Ω)

VB026BSP

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