MC33910G5AC/MC3433910G5AC
FUNCTIONAL DEVICE OPERATIONS
OPERATIONAL MODES
Interrupt
Control
VDD
HVSE
VDD
Module
PWMIN
PWMHSx
VS2
MOD1:2
HSx
High Side Driver
charge pump
open load detection
on/off
Control
current limitation
over-temperture shutdown (interrupt maskable)
high voltage shutdown (maskable)
HSxOP
Status
HSxCL
HSx
Wakeup
Module
Figure 17. High Side Drivers HS1 and HS2
Open Load Detection
A write to the High Side Control Register (HSCR), when
the over-temperature condition is gone, will re-enable the
high side drivers.
Each high side driver signals an open load condition if the
current through the high side is below the open load current
threshold.
High-voltage Shutdown
The open load condition is indicated with the bits HS1OP
and HS2OP in the High Side Status Register (HSSR).
In case of a high voltage condition and if the high voltage
shutdown is enabled (bit HVSE in the Mode Control Register
(MCR) is set both high side drivers are shut down.
Current Limitation
A write to the High Side Control Register (HSCR), when
the high voltage condition is gone, will re-enable the high side
drivers.
Each high side driver has an output current limitation. In
combination with the over-temperature shutdown the high-
side drivers are protected against over-current and short-
circuit failures.
Sleep And Stop Mode
When the driver operates in the current limitation area, it is
indicated with the bits HS1CL and HS2CL in the HSSR.
The high side drivers can be enabled to operate in Sleep
and Stop mode for cyclic sensing. Also see Table 6,
Operating Modes Overview.
Note: If the driver is operating in current limitation mode,
excessive power might be dissipated.
LIN PHYSICAL LAYER
Over-temperature Protection (HS Interrupt)
The LIN bus pin provides a physical layer for single-wire
communication in automotive applications. The LIN physical
layer is designed to meet the LIN physical layer specification
and has the following features:
Both high side drivers are protected against over-
temperature. In case of an over-temperature condition both
high side drivers are shut down and the event is latched in the
Interrupt Control Module. The shutdown is indicated as HS
Interrupt in the Interrupt Source Register (ISR).
• LIN physical layer 2.0, 2.1 and SAEJ2602 compliant
• Slew rate selection
• Over-temperature shutdown
• Advanced diagnostics
A thermal shutdown of the high side drivers is indicated by
setting all HSxOP and HSxCL bits simultaneously.
If the bit HSM is set in the Interrupt Mask Register (IMR),
then an interrupt (IRQ) is generated.
The LIN driver is a low side MOSFET with thermal
shutdown. An internal pull-up resistor with a serial diode
structure is integrated, so no external pull-up components are
33910
Analog Integrated Circuit Device Data
Freescale Semiconductor
34
FREESCALE [ Freescale ]
