MM908E625ACDWB/R2 Motorola, MM908E625ACDWB/R2 Datasheet - Page 32

• Manufacturer Part Number: MM908E625ACDWB/R2
• Description: Integrated Quad Half H-Bridge with Power Supply / Embedded MCU / and LIN Serial Communication
• Manufacturer: Motorola

Half-Bridge Overtemperature Protection
warning with the HTF in the Interrupt Flag Register (IFR). In
order to protect the outputs against overtemperature, the High-
Temperature Reset must be enabled. If this value is reached,
the part generates a reset and disables all power outputs.
Half-Bridge Overcurrent Protection
VSUP, and load shorts.
high-side MOSFETs on all HB high-side MOSFETs are
switched off automatically. In the event an overcurrent on the
low side is detected, all HB low-side MOSFETs are switched off
automatically. In both cases the overcurrent status flag
HB_OCF in the System Status Register (SYSSTAT) is set.
enabled) by writing a logic [1] to the HB_OCF flag in the System
Status Register or by reset.
Half-Bridge Overvoltage/Undervoltage
and overvoltage conditions. This protection is done by the low-
and high-voltage interrupt circuitry. If one of these flags (LVF,
HVF) is set, the outputs are automatically disabled.
908E625
32
The half-bridge outputs provide an overtemperature pre-
The half-bridges are protected against short to GND, short to
In the event an overcurrent on the high side is detected, the
The overcurrent status flag is cleared (and the outputs re-
The half-bridge outputs are protected against undervoltage
1
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 18. BEMF Signal Generation
Go to: www.freescale.com
the outputs re-enabled) by writing a logic [1] to the LVF/HVF
flags in the Interrupt Flag Register or by reset. Clearing this flag
is useless as long as a high- or low-voltage condition is present.
Half-Bridge Control Register (HBCTL)
OFC_EN—H-Bridge Offset Chopping Enable Bit
OFC_EN bit.
CSA—H-Bridges Current Sense Amplification Select Bit
the H-Bridges. Reset clears the CSA bit.
Reset
Read
Write
The overvoltage/undervoltage status flags are cleared (and
This read/write bit enables offset chopping. Reset clears the
• 1 = Offset chopping enabled.
• 0 = Offset chopping disabled.
This read/write bit selects the current sense amplification of
• 1 = Current sense amplification set for measuring 0.5 A.
• 0 = Current sense amplification set for measuring 2.5 A.
BEMF Signal
Coil Current
Voltage on
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
OFC_EN
Bit7
0
Register Name and Address: HBCTL - $02
1
CSA
6
0
5
0
0
4
0
0
3
0
0
CLS2
2
0
CLS1
1
0
CLS0
Bit0
0