VB024 datasheet(3/8 Pages) STMICROELECTRONICS

3 / 8 page

ELECTRICAL CHARACTERISTICS (Vb =12 V; Vs = 5 V Regulated; Tj =25

oC; Rcoil = 500 m

Ω;

Lcoil = 6mH unless otherwise specified)

Symbol

Parameter

Test Conditi ons

Mi n.

Typ.

Max.

Unit

Vcl

High Volt age Clamp

Vin =0.4 V

-40

≤ Tj ≤ 125 oC320

510

Vce(sat)

Saturation Voltage of

The Power Stage

Ic =6A;

Id =80 mA;

Vin =4V

Is(on)

Control Circuit Supply

Current

Control Circuit Supply

Voltage

4.5

5.5

Id(on)

Driver Stage Stand-by

Current

Vin =4 V

180

Driver Stage Supply

Voltage

5.5

Idiag

Diagnostic Current at

Wich The Flag Switches

-40

oC ≤ Tj ≤ 125 oC

2.75

3.35

VinH

High Level Input Voltage

5.5

VinL

Low Level I nput Volt age

0.2

IinH

High Level Input Current Vin =5.5 V

600

µA

Vpos

Positive Threshold

2.8

3.2

Vneg

Negat ive Threshold

1.3

1.7

Vhys

Hysteresis Voltage

1.3

1.7

Ic(max)

Turn-Off Current

Vin =4 V -40

oC ≤ Tj ≤ 125 oC7.3

8.8

t off

Switch-Off Time

Ic =6 A (see note 1)

µs

VdiagH

High Level Diagnost ic

Output Voltage

Rflag =20 K

Ω

44.5

VdiagL

Low Level Diagnost ic

Output Volatge

Rflag = 100 K

Ω

0.1

Note 1: Time fron input swi tching Vne g unti l VCL dr ops to 200 V

PRINCIPLE OF OPERATION

The VB024 is designed to drive the primary side

of an ignition coil and provide a logic signal

output to indicate a predetermined coil current

level. This output signal is used to perform dwell

control. This part is intended for use in Engine

Control Modules. It could also be used in an

ignition module or integrated into an ignition coil

assembly.

The VB024 accepts an input High signal from the

control IC to start charging the primary side of the

ignition coil. When the primary coil current

reaches 3 amps, the VB024 outputs a logic High

signal to the control IC. This flag signal is used in

the calculation of the dwell time.

This device also has a maximum primary coil

current Ic(max) Shut-off feature. Ic(max) equals

aproximately 1.5 times the nominal primary coil

currnet. If the Ic reaches Ic(max), the output stage

will Shut-off causing the spark to occour.

The VB024 is also internally clamped to protect it

from

the

flyback

voltage

the

primary

inductance as the output stage is turned off.

OVERVOLTAGE

The VB024 withstand the following transient test

performed using a ”Schaffner” equipment at TA =

oC:

1) LOAD DUMP

Ten pulses with 10 second intervals between

each transient. The device withstand load dump

while fully on, fully off and during the transition

between states (see figures 3 and 4).

2) NEGATIVE TRANSIENTS

Ten negative transients with 10 second intervals

between each transient (see figure 5).

3) REVERSE BATTERY

Inversion of battery voltage for a time = 60 sec

(see figure 5).

VB024

3/8

VB024 数据表(PDF) 3 Page - STMicroelectronics

VB024 数据表(HTML) 3 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8

数据表下载