vb325 STMicroelectronics, vb325 Datasheet

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vb325

Manufacturer Part Number
vb325
Description
High Voltage Ignition Coil Driver Power I.c.
Manufacturer
STMicroelectronics
Datasheet

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November 2003
DESCRIPTION
The VB325SP is a high voltage power integrated
circuit
VIPower™ M1-3 technology, with vertical current
flow power darlington and logic level compatible
driving circuit. The enable pin allows to externally
block the switch when the input is on. Built-in
protection circuit for coil current limiting and
collector voltage clamping allows the device to be
used as smart, high voltage, high current interface
BLOCK DIAGRAM
VB325SP
PRIMARY COIL VOLTAGE INTERNALLY SET
COIL CURRENT LIMIT INTERNALLY SET
DRIVING CURRENT QUASI PROPORTIONAL
SINGLE FLAG-ON COIL CURRENT
LOW VOLTAGE CLAMP THERMAL
SHUTDOWN
LOGIC LEVEL COMPATIBLE INPUT
TO COLLECTOR CURRENT
DIAGNOSTIC
OUTPUT
TYPE
made
V
IN
®
using
380V
V
cl
the
HIGH VOLTAGE IGNITION COIL DRIVER
E
STMicroelectronics
10A
I
cl
V
R
V
CC
REFERENCE
150mA
I
V
V
CC
F1
CC
-
V
V
LIM
TH
LIMITER
BASE CURRENT
in advanced electronic ignition system. If the input
signal from the micro happens to remain high, the
device protects itself against over-heating by
forcing collector current to smooth decrease (low
voltage clamp feature) and no undesidered spark
occurs (see figure 4).
QUASI PROP.
LGND
DRIVER
PROTECTION
10
THERMAL
BD
PowerSO-10™
POWER I.C.
1
VB325SP
GND
R
SN
SENSE
HV
C
1/9

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vb325 Summary of contents

Page 1

... LOGIC LEVEL COMPATIBLE INPUT DRIVING CURRENT QUASI PROPORTIONAL TO COLLECTOR CURRENT SINGLE FLAG-ON COIL CURRENT LOW VOLTAGE CLAMP THERMAL SHUTDOWN DESCRIPTION The VB325SP is a high voltage power integrated circuit made using the STMicroelectronics VIPower™ M1-3 technology, with vertical current flow power darlington and logic level compatible driving circuit ...

Page 2

... VB325SP ABSOLUTE MAXIMUM RATING Symbol HV Collector voltage (Internally limited Collector current (Internally limited current on Emitter Power C(gnd) V Driving stage supply voltage CC I Driving circuitry supply current current on Ground pin s(gnd) V Input voltage IN I Maximum Input Current IN f Logic Input Frequency in Operative Mode ...

Page 3

... R =0 =3.75mH; I =6.5A; T =25º =13V (See figure 6) bat =V ; OUT=Off (See Note 4) IN INH free to follow V OUT IN <10V and V >24V VB325SP < 125ºC; R =580m j coil Min Typ Max Unit 320 380 420 1 100 ...

Page 4

... Base Darlington Voltage Off V BD(off) V Base Darlington Voltage On V BD(on) PRINCIPLE OF OPERATION The VB325SP 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 V of the VB325SP is fed from a low ...

Page 5

... Time in Clamp (µsec) Figure 5: Typical application diagram +5V P ENABLE pin can be alternatively connected to LGND Figure 4: Low voltage clamp feature 700 800 900 1000 1 F 100nF FLAG 18K 1nF LGND VB325SP V bat GND 5/9 ...

Page 6

... VB325SP Figure 6: Switching time for inductive load V gen V CC 100V V bat 6/9 V bat C R gen D.U.T V gen OFF t ...

Page 7

... B 0. SEATING PLANE DETAIL "A" DETAIL "A" VB325SP inch MIN. TYP. 0.132 0.134 0.000 0.016 0.014 0.013 0.009 0.0126 0.370 0.291 0.366 0.283 0.287 0.232 0.232 0.050 0.049 0.047 0.543 0.545 0.002 0.047 0.031 0º ...

Page 8

... VB325SP SUGGESTED PAD LAYOUT PowerSO-10™ 14.6 - 14 TAPE AND REEL SHIPMENT (suffix “13TR”) TAPE DIMENSIONS According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb 1986 Tape width W Tape Hole Spacing P0 (± 0.1) Component Spacing P Hole Diameter D (± 0.1/-0) ...

Page 9

... STMicroelectronics - Printed in ITALY- All Rights Reserved. Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. The ST logo is a trademark of STMicroelectronics STMicroelectronics GROUP OF COMPANIES http://www.st.com VB325SP 9/9 1 ...

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