MCZ33937AEK Freescale Semiconductor, MCZ33937AEK Datasheet - Page 30

• Manufacturer Part Number: MCZ33937AEK
• Description: IC PRE-DRIVER 3PH ENH 54-SOIC
• Manufacturer: Freescale Semiconductor
• Series: SMARTMOS™r
• Type: 3 Phase Pre-Driverr

Specifications of MCZ33937AEK

• Configuration: 3 Phase Bridge
• Input Type: Non-Inverting
• Delay Time: 265ns
• Current - Peak: 600mA
• Number Of Configurations: 1
• Number Of Outputs: 3
• High Side Voltage - Max (bootstrap): 15V
• Voltage - Supply: 8 V ~ 40 V
• Operating Temperature: -40°C ~ 135°C
• Mounting Type: Surface Mount
• Package / Case: 54-SOIC (7.5mm Width) Exposed Pad, 54-eSOIC, 54-HSOIC
• Supply Current: 12 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

interrupt - the INT pin will be asserted High. The INT will be
held in the High state until the fault is removed, and the
appropriate bit in the Status Register 0 is cleared by the
CLINT0 command. This fault reporting technique is
described in detail in the
section.
Desaturation Detector
the output driver of each phase channel. It provides an
additional means to protect against “Short-to-Ground” fault
condition when the output node gets shorted to the supply
voltage (short across the High Side FET).
will be commanded ON after the end of the deadtime. The
deadtime period starts when the Low Side is commanded
OFF. If the voltage at Px_HS_S is less than 1.4V below V
after the blanking time (t
initiated. An additional 1.0 s digital filter is applied from the
initiation of the desaturation fault before it is registered, and
all phase drivers are turned OFF (Px_HS_G clamped to
Px_HS_S and Px_LS_G clamped to Px_LS_S). If the
desaturation fault condition clears before the filter time
expires, the fault is ignored and the filter timer resets.
30
33937
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
V SUP
The Desaturation Detector is a comparator integrated into
When switching from Low Side to High Side, the High Side
Phase
Comp.
Px_HS_G
PHASEx
Px_LS_G
Phase Error
Desaturation Error
3 x
Desat.
Comp.
T-Lim
Figure 18. Short to Ground Detection
-V D
VSUP
VSUP
R
R
1.4V
+
-
Deadtime
VLS
VLS_CAP
LS
Control
HS
Control
t BLANK
BLANK
-Side
Driver
-Side
Driver
High
Low
0.5V SUP
Logic Commands and Registers
Correct
Fault
Correct Phase x Output Voltage
Px_HS_G
Px_BOOT
Px_HS_S
Px_LS_G
Px_LS_S
) a desaturation fault is
t FILT
To Current
Sense Amplif.
Phase x Output
Voltage Shorted to Ground
V SUP
R Sense
Phase
Return
Phase x
Output
Phase x Output
Shorted to Ground
(Low-Side
FET Shorted)
SUP
can be retrieved by way of the SPI. Additional SPI commands
will mask the INT flag and disable output stage shutdown,
due to desaturation and phase errors. See the
Commands and Registers
behavior and disabling the protective function.
Phase Comparator
error is generated if the output signal (at Px_HS_S) does not
properly reflect the drive conditions.
Phase Comparator compares the voltage at the Px_HS_S
node with a reference of one half the voltage at the VSUP pin.
A High Side phase error (which will also trigger the
Desaturation Detector) occurs when the High Side FET is
commanded on, and Px_HS_S is still low at the end of the
deadtime and blanking time duration. Similarly, a LS phase
error occurs when the Low Side FET is commanded on, and
the Px_HS_S is still high at the end of the deadtime and
blanking time duration.
each phase. Each phase error is the OR of the High Side and
Low Side phase errors. This flag can generate an interrupt if
Valid faults are registered in the fault status register, which
Faults could also be detected as Phase Errors . A phase
A phase error is detected by a Phase Comparator. The
The Phase Error Flag is the triple OR of phase errors from
Comp.
Phase
V SUP
3 x
Desat.
Comp.
Px_HS_G
Px_LS_G
PHASEx
Phase Error
T-Lim
Figure 19. Short to Supply Detection
VSUP
VSUP
R
R
1. 4V
+
-
-V D
VLS
VLS_CAP
LS
Control
HS
Control
Deadtime
0.5V SUP
Phase x Output Voltage Shorted to V SUP
Correct
Analog Integrated Circuit Device Data
Fault
Driver
Driver
-Side
-Side
High
Low
t BLANK
Correct Phase x Output Voltage
section for details on masking INT
Px_HS_G
Px_BOOT
Px_LS_S
Px_HS_S
Px_LS_G
To Current
Sense Amplif.
Freescale Semiconductor
V SUP
R Sense
Phase x
Output
Phase
Return
Logic
Phase x Output
Shorted to V SUP
(High-Side
FET Shorted)