MM908E622ACDWBR2 FREESCALE [Freescale Semiconductor, Inc], MM908E622ACDWBR2 Datasheet - Page 41

• Manufacturer Part Number: MM908E622ACDWBR2
• Description: Integrated Quad Half-bridge, Triple High Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

output reenabled) by writing a logic [1] to the LVIF / HVIF
flags in the Interrupt Flag Register, or by reset. Clearing this
flag has no effect as long as a high or low voltage condition
is present.
HIGH SIDE OVER-TEMPERATURE PROTECTION
conditions.
thresholds.
When the temperature reaches this threshold, the HTI bit in
the interrupt flag register is set. An interrupt will be generated,
When the HTIE bit in the interrupt mask register is set. In
addition, this interrupt can be used to automatically turn off
the power stages (all high sides, on half-bridges, just the high
side FETs). This shutdown can be enabled/disabled by the
HTIS0 Bit.
the outputs reenabled) by writing a logic [1] to the HTIF flag
in the Interrupt Status Register, or by reset. Clearing this flag
has no effect, as long as a high temperature condition is
present.
Analog Integrated Circuit Device Data
Freescale Semiconductor
The over / under-voltage status flags are cleared (and the
The outputs are protected against over-temperature
Each power output comprises two different temperature
The first threshold is the high temperature interrupt (HTI).
The high temperature interrupt flag (HTIE) is cleared (and
PWM Terminal
HS Current
HS Over-Current Shutdown Threshold
Figure 24. Inrush Current Limitation on HS Outputs
(HTR) will be used to turn off all power stages (HB (all FETs),
HS, HVDD, EC, H0) in order to protect the device.
HIGH SIDE OVER-CURRENT PROTECTION
the over-current limit is reached, the output will be
automatically switched off and the over-current flag is set.
was implemented to avoid an over-current shutdown during
this inrush current. If a PWM frequency will be supplied to the
PWM input during the switch on of a bulb, the inrush current
will be limited to the over-current shutdown limit. This means,
if the current reaches the over-current shutdown, the high
side will be switched off, but each rising edge on the PWM
input will enable the driver again. The duty cycle supplied by
the MCU has no influence on the switch-on time of the high
side driver.
inrush current or a real shutdown, the software checks to see
if the over-current status flag (HSxOCF) in the High Side
Status register is set beyond a certain period of time.
If the HTIS shutdown is disabled, a second threshold
The HS outputs are protected against over-current. When
Due to the high inrush current of bulbs, a special feature
In order to distinguish between a shutdown due to an
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
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