MCZ33810EK Freescale Semiconductor, MCZ33810EK Datasheet - Page 21

• Manufacturer Part Number: MCZ33810EK
• Description: IC IGNITION INJECTOR 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33810EK

• Applications: Automotive
• Current - Supply: 10mA
• Voltage - Supply: 4.5 V ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-SOIC (7.5mm Width) Exposed Pad, 32-eSOIC, 32-HSOIC
• Product: Fan / Motor Controllers / Drivers
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 8. Open Secondary Timer
of the ignition coil primary spark signal and terminated on the
falling edge. The rising edge Open Secondary Threshold is
V
Secondary threshold is V
selected Open Secondary Fault Time interval
indicates a failed spark event. When the Open Secondary
Fault Time is exceeded and the Low-voltage Clamp is
enabled, the GDx output will activate the Low-voltage Clamp
shown in figure 16. The Logic for this Low-voltage Clamp is
defined in
LOW-VOLTAGE CLAMP
biases the IGBT's gate voltage in order to control the collector
to emitter voltage to VPWR+11V. This technique is used to
dissipate the energy stored in the ignition coil over a longer
period of time than if the internal IGBT clamp were used.
energy in the ignition coil is dissipated by the IGBT. This fault
condition requires the use of a higher energy rated IGBT than
would otherwise be needed.
Analog Integrated Circuit Device Data
Freescale Semiconductor
IH
The Open Secondary timer is initiated on the rising edge
Collector to gate clamp durations that last longer than the
The Low-voltage Clamp is an internal clamp circuit which
In the open secondary fault condition, all of the stored
= 135 V at primary, no hysteresis. The falling edge Open
Spark Command
Bits<b3,b2>
Figure 7. Open Secondary Spark Event
Figure 9
00
01
10
11
IL
= 135V.
Open Secondary Fault Timer
OSFLT (μs)
100
10
20
50
(Table
8)
MaxDwellEn
dissipation over a longer period of time, thus allowing the use
of a lower energy rated IGBTs. The internal low-voltage
clamp is connected between the IGBT's collector (through an
external resistor) and the IGBT's gate. The energy stored in
the ignition coil is dissipated by the IGBT, not the internal
clamp. The internal clamp only provides the bias to the IGBT.
the GDx Low-voltage Clamp feature. The GDx Low-voltage
Clamp feature may be disabled through bit 4 of the Spark
Command message.
SOFT SHUTDOWN ENABLE
asserting control bit 5 in the Spark Command message.
shutdown control of the gate driver.
• OUTEN = High (Outputs Disabled)
• Over-voltage on VPWR pin
SPARK DURATION
SPI input
OVER-VOLTAGE
MaxDwell
The Low-voltage Clamp spreads out the energy
Several logical signals are required as inputs to activate
The soft shutdown feature is enabled via the SPI by
When enabled, the following events initiate a soft
OSFLT_En
Open Secondary
OUTEN
IGN Mode
OSFLT
VPWR
Figure 9.
GATE DRIVE
CONTROL
Figure 8.
Low-voltage Clamp Logic
IGN Mode
V
Low-voltage Clamp
+
–
+
–
SoftShutDnEn
PWR
FUNCTIONAL DEVICE OPERATION
SPI
SPI
Low V
Clamp
+ −
13 V
OPERATIONAL MODES
100 µA
53 V
GPGD
Clamp
Activate
Low-voltage
Clamp
33810
FB0
FB1
FB2
FB3
GD0
GD1
GD2
GD3
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