VB026SP datasheet(4/7 Pages) STMICROELECTRONICS

4 / 7 page

Symbol

Parameter

Test Cond iti ons

Min.

Typ.

Max.

Un it

VinH

High Level Input Voltage

VCC =4.5V

VCC

Vin L

Low Level Input Voltage

VCC =5.5V

-0. 3

0. 8

Vin(h ys )

Input Threshold

Hysteresis

0.4

Iin H

High Level Input Current

Vin = 4 V

100

µA

IinL

Low Level Input Current

Vin =0. 8 V

-100

µA

Iin pd

Input Act ive Pull-Down

Vin = 4 V

100

µA

VdiagH

High Level Flag O utput

Voltage

REXT =22 K

Ω

CEXT =1 nF

(see not e 3)

VCC-1

VCC

VdiagL

Low Level Flag O utput

Voltage

REXT =22 K

Ω

CEXT =1 nF

(see not e 3)

0. 5

Id iagTH

Coil Current Level

Threshold

Tj =25

o C (see figure 1)

6. 15

6.5

6.85

Id iagTD

Coil Current Level

Threshold Drift

(see figure 3)

Idiag

High Level Flag O utput

Current

IC >IdiagTH

Vdiag =3V

0.5

T BD

Idia g(leak)

Leakage Current O n Flag

Output

Vin =LO W

VCC = 5.5V

µA

Antiparallel Diode

Forward Voltage

Ic =-1 A

Es/b

Single Pulse Avalanche

Energy

IC =8A

LC =6 mH

(see figure 4)

180

tpHL

Turn-on Delay Time of

Coil Current

Rc =0.5

Ω Lc =3.75 mH

(see figure 5)

TBD

µs

tpLH

Turn-off Delay Time of

Coil Current

Rc =0.5

Ω Lc =3.75 mH Ic =6.5A

(see figure 5)

TBD

µs

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

ELECTRICAL CHARACTERISTICS (continued)

PRINCIPLE OF OPERATION

The VB026SP 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 VB026SP 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 VB026SP 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

overvoltage.

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 VB026SP 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)

VB026SP

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