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PDF MC33094 Data sheet ( Hoja de datos )
| Número de pieza | MC33094 | |
| Descripción | IGNITION CONTROL | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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MOTOROLA
Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
Order Number: MC33094/D
Rev. 0, 06/2001
Advance Information
Ignition Control
Designed for automotive ignition applications in 12 V systems, the
MC33094DW provides outstanding control of the ignition coil when used
with an appropriate Motorola Power Darlington Transistor. Engine control
systems utilizing these devices for ignition coil control exhibit exceptional
fuel efficiency and low exhaust emissions. The device is designed to be
controlled from a single–ended Hall Sensor input. The circuit is built using
high–density Integrated–Injection Logic (IIL) processing incorporating high
current–gain PNP and NPN transistors.
The MC33094DW is packaged in an economical surface mount package
and specified over an ambient temperature of –40°C to 125°C with a
maximum junction temperature of 150°C.
• External Capacitors Program the Devices Timing Characteristics
• Overvoltage Shutdown Protection
• Auto Start–Up Capability After Overvoltage Condition Ceases
• Allows for Push Start–Up in Automotive Applications
• Ignition Coil Current Limiting
• Ignition Coil Voltage Limiting
• Band Gap Reference for Enhanced Stability Over Temperature
• Negative Edge Filter for Hall Sensor Input Transient Protection
• Hall Sensor Inputs for RPM and Position Sensing
• –40°C ≤ TA ≤ 125°C Ambient Operating Temperature
MC33094
IGNITION CONTROL
SEMICONDUCTOR
TECHNICAL DATA
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
MAXIMUM RATINGS (All voltages are with respect to ground, unless
otherwise noted.)
Rating
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁJunction Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOperating Ambient Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁContinuous
Symbol
VCC
TJ
TA
Value
28.6
150
–30 to 105
Unit
V
°C
°C
N.C. 1
Master Bias
(MB)
Adaptive Capacitor
(CA)
Ramp Capacitor
(CR)
2
3
4
16 N.C.
15
Stall Capacitor
(CS)
14
Current Sense
(S)
13
Process Test
(T)
Limited
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStorage Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOperating Frequency Range
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSoldering Temperature
SO–16L (for 10 seconds)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁThermal Resistance
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁJunction–to–Ambient (SO–16L)
Tstg
fop
Tsolder
RθJA
–40 to 125
–55 to 150
1.0 to 400
270
°C
Hz
°C
97 °C/W
N.C. 5
IC Ground
(Gnd)
Negative Input
(Vin(-))
Start
(ST)
6
7
8
(Top View)
12
Output
(O)
11
Coil
(CL)
10
Distributor Signal
(D)
9
Supply
(VCC)
NOTE: ESD data available upon request.
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
PC33094DW TA = –40° to +125°C SO–16L
This document contains information on a new product. Specifications
and information herein are subject to change without notice.
©MMOoTtoOroRla,OInLcA. 20A0N1.AAlLl rOighGtsIrCeseDrvEeVd.ICE FDoATrAMore Information On This Product,
Go to: www.freescale.com
1
1 page  
Freescale SMeCm3i3c0o94nductor, Inc.
ELECTRICAL CHARACTERISTICS (continued) (Characteristics noted under conditions 6.0 V ≤ VD = VCC ≤ 16 V,
–40°C ≤ TA ≤ 125°C, unless otherwise noted. Typical values are specified for TA = 25°C.)
Characteristic
Symbol
Min
Typ
Max Unit
OUTPUT AND DWELL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAdaptive Dwell Logic, Ramp Threshold (VCC= 14 V, Vin(–) = 10 V,
VCA = VCS = Open, VST = 0 V, VD = 10 V, VS = 0 V) (Note 6)
VCRO
–60
0
60 mV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSoft Shutdown Voltage (VCC = 6.0 V, Vin(–) = 10 V,
VSS 0 1.48 16.7 mV
VCA = VCR = VCS = Open, VST = 0 V) Measure VS
NOTES: 1. Capability measured by forcing the Output to 2.0 V with Current Sense pin (IS) open while measuring the Output current to ground.
2. Measured by clamping the output to that output voltage with IS pin to ground; then increasing VD from 6.0 to 18 V and measuring output leakage
current to ground.
3. Output Clamp voltage with reference to ground while forcing 10 mA into the Dynamic Clamp pin (CL).
4. Output Clamp impedance measured with ICL = 11 ± 1.0 mA into the Dynamic Clamp pin (CL) and noting the corresponding Output Clamp Voltage
change (ZCL = ∆VCL/∆ICL).
5. Dwell is defined as Run Mode Down Current divided by the Run Mode Up Current times the Ramp Control Current Ratio and is calculated from other
measured characteristics as defined above.
6. Set the VCR voltage to 1.5 V; Ramp VCR voltage from 1.8 to 2.2 V in 0.02 V increments and note the Ramp voltage (VCR) which causes the Output
voltage to go > 1.0 V; VCRO = 2.0 V – VCR.
ELECTRICAL CHARACTERISTICS (Characteristics noted under conditions 6.0 V ≤ VD = VCC ≤ 16 V,
–40°C ≤ TA ≤ 125°C, unless otherwise noted. Typical values are specified for TA = 25°C.)
Characteristic
ADAPTIVE CAPACITOR
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRun Mode, Adaptive Capacitor, Charge Current (VCC = 6.0 V,
Symbol
ICA1
Min
–7.91
Typ
–6.53
Max
–5.62
Unit
µA
Vin(–) = 5.0 V, VCA = Open, VCR = 3.0 V, VCS = 3.0 V,
VST = 6.0 V) (Note 1)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRun Mode, Adaptive Capacitor, Discharge Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(VCA= Open, VCS = 3.0 V, VCR = 3.0 V, VST = 6.0 V)
µA
Normal Condition (VCC = 6.0 V, Vin(–) = 10 V)
ICA2 3.7 4.77 5.63
High Voltage Condition (VCC = 22 V, Vin(–) = 17 V, VD = 13 V)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStart Mode, Adaptive Capacitor Currents
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(VCA = VCR = VCS = Open, VST = 10 V)
ICA3 1.05 1.43 1.82
µA
Charge Current (VCC = 5.0 V, Vin(–) = 10 V) (Note 2)
ICA4
–112
–87
–80
Discharge Current (VCC = 6.0 V, Vin(–) = 0 V) (Note 3)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStart Mode, Adaptive Capacitor, Clamp Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(VCC = 6.0 V, VCA = VCR = VCS= Open, VST = 10 V)
ICA5 67.6 89.4 109
V
High Clamp Voltage (Vin(–) =10 V)
Low Clamp Voltage (Vin(–) = 0 V)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAdaptive Gain (VCC = 14 V, Vin(–) = 11 V, VST = 6.0 V,
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVCA = Open, VCR = 3.0 V, VCS = 3.0 V , VD = 13 V) (Note 4)
VCA1
VCA2
AG
2.23
0.95
0.85
2.39
1.1
0.99
2.65
1.26
1.15 Times
NOTES: 1. Open VCR initially then force VCR = 3.0 V and measure ICA1.
2. Start Mode Adaptive Control sourcing current.
3. Start Mode Adaptive Control sink current.
4. Measure ICA. Calculate: AG = ICR1/ICA.
MOTOROLA ANALOG IC DEVICE FDoATrAMore Information On This Product,
Go to: www.freescale.com
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Freescale SMeCm3i3c0o94nductor, Inc.
Ignition Circuit Operation Description
When initially powered up, all module capacitors start
discharged (0 V). The VCC capacitor will power up first, and
the IC’s internal logic latches are indeterminate. The
following conditions will hold: STALL = 1, because the stall
capacitor voltage is less than 2.0 V; 25% = 0, because the
ramp capacitor is less than the Band Gap Reference voltage
(Vbg); and Icoil = 0 amps, because the stall capacitor is at 0 V.
Because 25% = 0, the ramp capacitor charges towards Vr.
At cranking frequencies, the ramp capacitor always exceeds
the start mode threshold at the input (ZC), and therefore the
stall signal resets the start mode latch upon the first ac signal
(this causes the adaptive capacitor to be discharged). With
the adaptive capacitor held low, very high rates of
acceleration are possible. If the adaptive capacitor were
allowed to adapt the dwell at low frequencies, severe
limitations to engine acceleration would occur.
See Figure 13. At point A, a spark from the previous cycle
occurs as the field around the coil collapses rapidly. At the
same time ZC (ZC (input) = high(1)) will set the 25% clock
signal which commands the adaptive and ramp capacitors to
discharge and the stall capacitor to charge. At point B, as the
ramp capacitor voltage crosses the 1.2 V (Vbg) level, the 25%
clock is cleared and the polarities and amplitude of the ramp
and stall capacitor currents change to their appropriate
levels. At this point the adaptive capacitor is discharged and
begins to float. At point C, the coil turns on and ramps until
the coil current is limited to 6.5 amps. The adaptive capacitor,
at point D, remains discharged and the dwell is maximized to
6.5 amps because the start/run latch has yet to be set. At
point E, ZC (ZC = high) turns the coil off causing a spark to
occur and at which point a new cycle begins. As the engine
frequency increases, the peak voltage on the ramp capacitor
at the ac signal will fall below the start mode enable threshold
level. The start mode enable detector then sets the start/run
latch to the run mode (CADUMP = 0) by clocking a zero into
the start/run latch at the zero cross. At this time the adaptive
algorithm is evoked and the adaptive capacitor is allowed to
charge and discharge according to it’s other logical inputs.
After normal run mode operation is entered, the start mode
may not be reentered even though the ramp capacitor
voltage again exceeds the start mode enable threshold. A start
mode may only be evoked by a STALL signal transition from
logic 1 to 0. The STALL signal transition occurs at a ZC
frequency of approximately 2.0 Hz.
The IC and circuit provides for other than normal starting
procedures such as push starting the engine. Since the stall
capacitor will be discharged in this low frequency mode, the
IC will provide a spark timing with a maximum retardation of
about 6.5 ms.
After the start mode operation is exited, the normal
operation algorithm is entered and a different sequence of
events dominate the IC’s performance. See Figures 14, 15,
and 16. At point A, the spark from the previous cycle occurs
and the 25% part of the cycle begins. During this part of the
cycle, the stall capacitor will charge and the ramp and
adaptive capacitors will discharge. At point B, the “not 25%”
part of the cycle, also called the 75% part of the cycle, begins.
The stall capacitor discharges, while the ramp capacitor
charges. During this part of the cycle the adaptive capacitor
floats. At point C, the ramp capacitor voltage equals the
voltage on the adaptive capacitor. At this time, the coil turns
on and the coil current ramps to the point where it is limited.
When the coil current reaches the limit, point D, the adaptive
capacitor begins to charge, until zero cross (ZC = 1logic(high)),
point E. This turns the coil off and induces a spark. The 75%
part of the cycle lasts until point E, at which time the cycle
begins again.
The adaptive dwell algorithm causes the engine to
maintain a fixed percent of excess dwell time (if possible).
The mechanism that permits this involves the floating nature
of the adaptive capacitor. During engine deceleration, the
initial coil turn–on might occur early, but the next coil turn–on
will be retarded to it’s correct location due to the % adjusted
adaptive capacitor charge time. During acceleration, the coil
may not charge up as early as desired the first time, however,
the spark will still be correctly slaved to the distributor. The
side effect of this is that the adaptive capacitor will not receive
as much charge time for that cycle and will have a lower
average value the next cycle, thus starting the coil charging
sooner, as can be seen in Figure 16. In this figure, the output
voltage rises before the adaptive capacitor charge signal
occurs.
See Figure 12. In the Stall mode the output is slaved by the
stall capacitor. The stall capacitor can discharge completely,
but starting at point X it charges during the 25% of the engine
cycle (duration of when ZC is logic high = 1). At the same time
a spark from the previous cycle occurs. The DWELL signal
will be high as long as the engine is in stall, but falls gradually
preventing a spark at point Y when the STALL goes low
starting at 2.4 V. The coil will be slaved to the stall capacitor,
and at point Z the coil will charge to 6.5 amps as the stall
capacitor charges to 2.0 V. At that time the STALL
comparator will trip (STALL = 0) and the DWELL signal will
fall, triggering a reduced spark with some retardation (6.5 ms).
At this point a new cycle begins.
Each of the three different modes (Stall, Start, and Run)
have their own differences. The Stall capacitor controls the
output in the stall mode, however is disabled in both the start
and run modes. The output is clamped longer in the start
mode as compared to the run mode due to the more
energy/current in the coil causing a longer/bigger spark.
Other less likely operating sequences are possible. For
example, there is a possibility of VCC exceeding 15 V during
engine operation (High battery = logic 1). Above about 17 V
on Vbat, the excess current limit percentage falls to 5% to
conserve IC and circuit power dissipation. Above 25 V,
current to the coil is disabled. Care was placed in this design
to account for all possible operating modes.
MOTOROLA ANALOG IC DEVICE FDoATrAMore Information On This Product,
Go to: www.freescale.com
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MC33094.PDF ] | |
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