The VB326 SP is a hi gh vol tage po wer inte grated
circuit made using the STMicroelectronics
VIPower™ M1-3 tec hnology, with v ertical curre nt
flow power darlington and logic level compatible
driving c ircuit. T he enable pin all ows to ex ter nally
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
V
CC
10
1
PowerSO-10™
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 collect or current to smooth decr ease (low
voltage clamp feature ) and no undesi dered spark
occurs (see figure 4).
BD
HV
V
IN
DIAGNOSTIC
OUTPUT
DRIVER
QUASI PROP.
BASE CURRENT
R
LIMITER
V
CC
V
F1
V
V
R
E
-
REFERENCE
LIM
V
TH
LGND
THERMAL
PROTECTION
SENSE
SN
GND
C
November 20031/9
VB326SP
ABSOLUTE MAXIMUM RATING
SymbolParameterValueUnit
C
CC
s
IN
s/b
BD
stg
E
Collect or voltage (Internally limited)-0.3 to V
c
clamp
Collect or curren t (Internally limi ted)10A
DC current on Emitter Power± 10.5A
Driving stage su pply volt age-0.3 to 7V
Driving circuitry suppl y current± 200mA
DC current on Ground pin± 1A
Input voltage-0.3 to V
+ 0.3V
CC
Maximum Input Current100mA
Logic In put Frequency in Ope rative Mod eDC to 150Hz
Output Voltage Primary Threshold Cu rrent Level-0.3 to V
+ 0.3V
CC
Flag Output Current100mA
Power Dissi pation (Tc=25°C)125W
Self Cla m ped Energy during Ou tput Power Clamping (See figure 2)275mJ
ESD voltage (HVc pin)± 4KV
ESD voltage (Enable pin)+ 1.5 ; -2KV
ESD voltage (Other pins)± 2KV
Input Darlington Base Current150mA
Input Dar lington Base VoltageInternally limitedV
Operating Junction Temperature-40 to 150°C
j
Storage temperature Range-55 to 150 °C
Maximum Enable Voltage-0.3 to 5.5V
E
Maximum Enable Current± 150µA
HV
I
I
C(gnd)
V
I
I
s(gnd)
V
I
IN
f
IN
V
OUT(flag)
I
OUT(flag)
P
max
E
V
ESD
V
ESD
V
ESD
I
BD
V
T
T
V
I
V
THERMAL DAT A
SymbolParameterValueUnit
R
thj-case
R
thj-amb
Thermal resistance junction-case (MAX) 1°C/W
Thermal resista nc e ju nctio n- am b ie nt (MAX)51°C/W
Pin 1 and Pin 5 must be ex ternally co nnected to Pins 2÷4.
E
V
CC
BD
INPUT
FLAG
6
7
8
9
10
TAB
HV
C
5
4
3
2
1
2/9
VB326SP
ELECTRICAL CHARACTERISTICS (5.3V < V
=3.75mH unless otherwise specified; See note 1)
L
coil
< 24V; VCC=5V ± 10%; -40ºC < Tj < 125ºC; R
bat
=580mΩ;
coil
SymbolParameterTest ConditionsMinTypMaxUnit
High Voltage ClampI
V
cl
V
V
ce(sat)
I
CC(stdby)
I
CC
I
CC(peak)
V
I
I
c(off)
T
Ic_ctr
V
INH
V
V
IN(hyst)
I
INH
I
INL
I
INpd
V
diagH
V
diagL
I
diagTH
I
diagTD
I
diag
I
diag(l eak)
V
E
t
ON
t
OFF
T
V
V
Note 1: param etric degratation are allowed with 5.3<Vb<10V an d Vb>24V.
Note 2: the primary coil current value I
Note 3: no inte r nal Pull-down .
Note 4: if ENAB LE pin is floating OUT =Off for every input status.
(*) Internally Limited
Low Voltage ClampI
lcl
Power Stage Saturation
Voltage
Stand-by Supply CurrentIN=Of f11mA
DC Logic Curr ent
Peak DC Logic Current
during On Phase
DC Logic Vo ltage4.55.5V
CC
Coil Current Limit
cl
Output Off State CurrentIN=Off; V
Thermal Temperature
Output Current Control
High Level Input Volt ageVCC=4.5V4V
Low Level Input VoltageVCC=5.5V-0.30.8V
INL
Input Threshold Hy steresi s0.4V
High Level Input CurrentVIN=4V100µA
Low Level Input CurrentVIN=0.8V030µA
Inpu t A ctive Pull DownVIN=4V10100µA
High Level Flag Output
Voltage
Low Level Flag Output
Voltage
Coil Current Level T hresho ld Tj=25ºC6.156.56.85A
Coil Curre nt Level Thres hold
Drift
High Level Flag Output
Current
Leakage C urrent on Flag
Output
Antipara ll el Diode Fo rward
F
Voltage
Sing le Pulse Avalanche
s/b
Ener gy
Turn-on time
Turn-off time
Ther ma l sh ut-down
sd
intervention
High Level Enable VoltageVIN=V
EH
Low Level Enable VoltageV
EL
must be measured 1ms after desaturation of the power stage.
cl
=6.5A320360420V
coil
=6.5A; Tj=T
coil
sd
304050V
IC=6A; VIN=4V1.52V
Vb=16V; IC=6.5A; f=100Hz; Load = Coil;
VCC=5.5V
40mA
IC=6.5A100150mA
-40ºC < T
(See no te 2)
< 125ºC
j
=24V; VCC=5V; Tj=25ºC5mA
HVC
911A
OUT=On150(*)ºC
CC
R
EXT
R
EXT
=22KΩ; C
=22KΩ; C
=1nF (S ee note 3)V
EXT
=1nF (S ee note 3)0.5V
EXT
- 1V
CC
CC
(See figure 1)
IC > I
diagTH
; V
=3V0.5mA
diag
VIN=Low; VCC=5.5V10µA
= -1A2V
I
C
L=6mH; IC= 8A (See figure 2)180mJ
Rc=0.5Ω; Lc=3.75m H ; Tj=25ºC;
V
=13V (S ee figure 6)
bat
Rc=0.5Ω; Lc=3.75mH; IC=6.5A; Tj=25ºC;
V
=13V (S ee figure 6)
bat
15µs
1525µs
150ºC
; OUT=Off (See Note 4)2V
INH
free to follow V
OUT
IN
0.40V
V
V
3/9
1
VB326SP
ELECTRICAL CHARACTERISTICS (continued)
SymbolParameterTest ConditionsMinTypMaxUnit
I
EH
I
EL
V
BD(off)
V
BD(on)
High Level Sinked Enable
Current
Low Level Sinked Enable
Current
Base Darlington Voltage Off VE=V
Base Darlington Voltage On VIN=V
VE=5V500µA
VE<0.4V- 200µA
EH
; VE=VEL; IC=6.5A1.8V
INH
1V
PRINCIPLE OF OPERATION
The VB326SP is mainly intended as a high voltage
power switch device driven by a logic le vel input
and interfaces directl y to a hi gh energ y electro nic
ignition coil.
The input VIN of the VB326S P is fed from a low
power signa l generated by an external con troller
that determinesb oth dwell time an d ignition point .
During Vin high (≥ 4V) the VB326SP increases
current in the coil to the desired, internally set
current level.
After reachi ng this level, the coil current r emains
constant until the ignition point, that corresponds
to the transiti on of Vin fr om hig h to low (ty p. 1.9V
threshold).
During the coil current switch-off, the primary
Vcl, typical ly 380V. T he transiti on from sa turation
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 sign al is turne d high and it remains so,
until the input voltage is turned-off.
OVERVOLTAGE
The VB326SP can withstand the following
transients of the battery line:
Information furnished is believed to be accurate and r eliable. Ho wev er, STMicroelectr onics assume s no r es ponsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specif ic ations mentioned in this publication are
subject to c hange withou t notice. This publicatio n s upersedes and replaces all information previous ly s upplied. STM icroelect r on ics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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The ST logo is a trademark of ST M ic r oelectronic s
2003 STMicroelectronics - Printed in ITALY- All Rights Reserved.
STMicroelectronics GROUP OF COMPANIES
http://www.st.com
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