MC34911BACR2 Freescale, MC34911BACR2 Datasheet - Page 35

• Manufacturer Part Number: MC34911BACR2
• Manufacturer: Freescale

Specifications of MC34911BACR2

• Turn Off Delay Time: 10us
• Number Of Drivers: 2
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Compliant

inductive load (relay) is turned off. An active clamp will re-
enable the low side FET if the voltage on the LS1 or LS2 pin
exceeds a certain level.
PWM Capability (direct access)
direct control via the PWMIN pin.
Open Load Detection
current through the low side is below the open load current
threshold.
and LS2OP in the Low Side Status Register (LSSR).
Current Limitation
combination with the over-temperature shutdown the low
side drivers are protected against over-current and short-
circuit failures.
indicated with the bits LS1CL and LS2CL in the LSSR.
excessive power might be dissipated.
Over-temperature Protection (LS Interrupt)
temperature. In case of an over-temperature condition both
low side drivers are shut down and the event is latched in the
Interrupt Control Module. The shutdown is indicated as an LS
Interrupt in the Interrupt Source Register (ISR).
then an Interrupt (IRQ) is generated.
over-temperature condition is gone, will re-enable the low
side drivers.
Analog Integrated Circuit Device Data
Freescale Semiconductor
To protect the device against over-voltage when an
Each low side driver offers additional (to the SPI control)
Each low side driver signals an open load condition if the
The open load condition is indicated with the bit LS1OP
Each low side driver has a current limitation. In
When the drivers operate in current limitation, this is
Note: If the drivers are operating in current limitation mode
Both low side drivers are protected against over-
If the bit LSM is set in the Interrupt Mask Register (IMR)
A write to the Low Side Control Register (LSCR), when the
MOD1:2
LSxOP
LSxCL
HVSE
LSx
Interrupt
Module
Control
Control
Status
on/off
Figure 18. Low Side Drivers LS1 and LS2
Over-temperture Shutdown (interrupt maskable)
High-voltage shutdown (maskable)
Open-load Detection
Low Side Driver
Current Limitation
(active clamp)
Control Register (LSCR), then the LS1 driver is turned on if
the PWMIN pin is high and turned off if the PWMIN pin is low.
The same applies to the LS2 and PWMLS2 bits for the LS2
driver.
High-voltage Shutdown
shutdown is enabed (bit HVSE in the Mode Control Register
(MCR) is set both low sides drivers are shut down.
high-voltage condition is gone, will re-enable the low side
drivers.
Sleep And Stop Mode
Also see
LIN PHYSICAL LAYER
communication in automotive applications. The LIN physical
layer is designed to meet the LIN physical layer specification
and has the following features:
shutdown. An internal pull-up resistor with a serial diode
structure is integrated, so no external pull-up components are
required for the application in a slave node. The fall time from
dominant to recessive and the rise time from recessive to
dominant is controlled. The symmetry between both slopes is
guaranteed.
If both the bits LS1 and PWMLS1 are set in the Low Side
In case of a high-voltage condition and if the high-voltage
A write to the Low Side Control Register (LSCR), when the
The low side drivers are disabled in Sleep and Stop mode.
The LIN bus pin provides a physical layer for single-wire
• LIN physical layer 2.0, 2.1 and SAEJ2602 compliant
• Slew rate selection
• Over-temperature shutdown
• Advanced diagnostics
The LIN driver is a low side MOSFET with thermal
PWMLSx
Table 6, Operating Modes
V
DD
FUNCTIONAL DEVICE OPERATIONS
active
clamp
Overview.
PGND
OPERATIONAL MODES
V
DD
PWMIN
LSx
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