908E621_07 Datasheet, PDF (22/62 Pages) Freescale Semiconductor, Inc – Integrated Quad Half-Bridge and Triple High-Side with Embedded MCU and LIN for High End Mirror

FUNCTIONAL DESCRIPTION
FUNCTIONAL TERMINAL DESCRIPTION
EXTERNAL RESET TERMINAL (RST)
A logic [0] on the RST terminal forces the MCU to a known
startup state. RST is bidirectional, allowing a reset of the
entire system. It is driven LOW when any internal reset
source is asserted.
This terminal contains an internal pullup resistor that is
always activated, even when the reset terminal is pulled
LOW.
For details refer to the 68HC908EY16 datasheet.
POWER SUPPLY TERMINALS (VSUP1:VSUP8)
VSUP1:VSUP8 are device power supply terminals. The
nominal input voltage is designed for operation from 12 V
systems. Owing to the low ON-resistance and current
requirements of the half-bridge driver outputs and high-side
output drivers, multiple VSUP terminals are provided.
All VSUP terminals must be connected to get full chip
functionality.
POWER GROUND TERMINALS (GND1:GND4)
GND1:GND4 are device power ground connections.
Owing to the low ON-resistance and current requirements of
the half-bridge driver outputs and high-side output drivers,
multiple terminals are provided.
GND1 and GND2 terminals must be connected to get full
chip functionality.
HALF-BRIDGE OUTPUT TERMINALS (HB1:HB4)
The 908E621 device includes power MOSFETs
configured as four half-bridge driver outputs. The HB3:HB4
have a lower R_DS(ON), to run higher currents (e.g. fold motor),
than the HB1:B2 outputs.
The HB1:HB4 outputs are short-circuit and
overtemperature protected, and they feature current recopy.
Over current protection is done on both high-side and low-
side FET’s. The current recopy are done on the low-side
MOSFETs.
HIGH-SIDE OUTPUT TERMINALS (HS1:HS3)
The HS output terminals are a low R_DS(ON) high-side
switches. Each HS switch is protected against
overtemperature and overcurrent. The output is capable of
limiting the inrush current with an automatic PWM or feature
a real PWM capability using the PWM input.
The HS1 has a lower R_DS(ON), to run higher currents (e.g.
heater), than the HS2 and HS3 outputs.
For the HS1 two terminals (HS1a:HS1b) are necessary for
the current capability and have to be connected externally.
Important: The HS3 can be only used to drive resistive
loads.
HALL-EFFECT SENSOR INPUT TERMINAL (H0)
The Hall-effect sensor input terminal H0 provides an input
for Hall-effect sensors (2pin or 3pin) or a switch.
ANALOG INPUT TERMINALS (A0, A0CST)
These terminals are analog inputs with selectable current
source values. The A0CST is intent to trim the A0 input.
WAKE-UP INPUT TERMINAL (L0)
This terminal is 40V rated input. It can be used as wake-up
source for a system wake-up. The input is falling or rising
edge sensitive.
Important: If unused this terminal should be connected to
VSUP or GND to avoid parasitic transitions. In Low Power
Mode this could lead to random wake-up events.
SWITCHABLE V_DD OUTPUT TERMINAL (HVDD)
The HVDD terminal is a switchable V_DD output for driving
resistive loads requiring a regulated 5.0 V supply; e.g.,
3-terminal Hall-effect sensors or potentiometers. The output
is short-circuit protected.
LIN BUS TERMINAL (LIN)
The LIN terminal represents the single-wire bus
transmitter and receiver. It is suited for automotive bus
systems and is based on the LIN bus specification.
+5.0 V VOLTAGE REGULATOR OUTPUT
TERMINAL (VDD)
The VDD terminal is needed to place an external capacitor
to stabilize the regulated output voltage. The VDD terminal is
intended to supply the embedded microcontroller.
Important The VDD terminal should not be used to
supply other loads; use the HVDD terminal for this purpose.
The VDD, EVDD and VDDA/VREFH terminals must be
connected together.
VOLTAGE REGULATOR GROUND TERMINAL
(VSS)
The VSS terminal is the ground terminal for the connection
of all non-power ground connections (microcontroller and
sensors). Important VSS, EVSS and VSSA/VREFL
terminals must be connected together.
RESET TERMINAL (RST_A)
RST_A is the bidirectional reset terminal of the analog die.
It is an open drain with pullup resistor and must be connected
to the RST terminal of the MCU.
908E621
22
Analog Integrated Circuit Device Data
Freescale Semiconductor