MM908E622ACDWBR2 FREESCALE [Freescale Semiconductor, Inc], MM908E622ACDWBR2 Datasheet - Page 39

• 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]

switched off.
Half-bridge Status and Control Register (HBSCTL), the
recirculation behavior in PWM mode can be controlled. If
CRM is set the corresponding low-side MOSFET is switched
on if the PWM controlled high side MOSFET is off.
Half-bridge Current Recopy
allow a current recopy feature. These sense sources are
internally amplified and switched to the Analog Multiplexer.
selected via the CSA bit in the A0MUCTL register (see
page
Half-bridge Over-temperature Protection
conditions. Each power output comprises two different
temperature thresholds.
If the temperature reaches this threshold, the HTIF bit in the
Interrupt Flag Register (IFR) is set, and an interrupt will be
initiated, if the HTIE bit in the Interrupt Mask register is set. In
addition, this interrupt can be used to automatically turn off
the power stages. This shutdown can be enabled/disabled by
the HTIS0-1 bits in the System Control Register (SYSCTL).
the outputs reenabled) by writing a “1” to the HTIF flag in the
Interrupt Flag Register (IFR), or by a reset. Clearing this flag
has no effect as long as a high temperature condition is
present.
temperature reset (HTR) will be used to turn off all power
stages (HB (all Fet’s), HS, HVDD, EC, H0) in order to protect
the device.
Half-bridge Over-current Protection
VSUP, and load shorts. The over-current protection is
implemented on each HB. If an over-current condition on the
high side MOSFET occurs, the high side MOSFET is
automatically switched off. An over-current condition on the
low side MOSFET will automatically turn off the low side
MOSFET. In both cases, the corresponding HBxOCF flag in
the Half-bridge Status and Control Register (HBSCTL) is set.
corresponding Half-bridge MOSFETs reenabled) by writing a
Analog Integrated Circuit Device Data
Freescale Semiconductor
If the incoming signal is low, the high side MOSFET is
With the current recirculation mode control bit CRM in the
Each low side MOSFET has an additional sense output to
The factor for the Current Sense amplification can be
CSA = “1”: low resolution selected
CSA = “0”: high resolution selected
The outputs are protected against over-temperature
The first threshold is the high temperature interrupt (HTI).
The high temperature interrupts flag (HTIF) is cleared (and
If the HTI shutdown is disabled, a second threshold high
The Half-bridges are protected against short to GND,
The over-current status flag is cleared (and the
32)
“1” to the HBxOCF in the Half-bridge Status and Control
Register (HBSCTL), or by a reset.
Half-bridge Over-voltage/Under-voltage Protection
voltage and over-voltage conditions. This protection is done
by the low and high voltage interrupt circuitry. If one of these
flags (LVIF, HVIF) are set. The outputs are automatically
disabled if the VIS bit in the System Control Register
(SYSCTL) is cleared.
cleared (and the outputs reenabled) by writing a “1” to the
LVIF / HVIF flags in the Interrupt Flag Register (IFR)- or by a
reset. Clearing this flag has no effect as long as the high
voltage or low voltage condition is still present.
Half-bridge Status and Control Register (HBSCTL)
CRM — Current Recirculation Mode bit
PWM. Reset clears the CRM bit.
HBxOCF — Half-bridges Over-current Flag Bit
on either the LS or the HS FET on HBx has occurred.
[1] to HBxOCF. Writing a logic [0] to HBxOCF has no effect.
Reset clears the HBxOCF bit.
High Side Drivers
targeted for driving lamps. The high sides are protected
against over-temperature, over-current and over-voltage/
under-voltage.
Reset
Read
Write
The half-bridge outputs are protected against under-
The over-voltage and under-voltage status flags are
This read/write bit selects the recirculation mode during
This read/write bit indicates that an over-current condition
Clear HBxOCF and enable Half-bridge by writing a logic
The high side outputs are low resistive high side switches
1 = recirculation via switched on low side MOSFET
0 = recirculation via low side free wheeling diode
1 = over-current condition on HBx occurred
0 = no over-current condition on HBx
CRM
Bit7
0
Register Name and Address: HBSCTL - $03
6
0
0
5
0
0
FUNCTIONAL DEVICE OPERATION
4
0
0
OCF
HB4
3
0
OPERATIONAL MODES
OCF
HB3
2
0
OCF
HB2
1
0
908E622
HB1
OCF
Bit0
0
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