mc33789 Freescale Semiconductor, Inc, mc33789 Datasheet - Page 36

• Manufacturer Part Number: mc33789
• Description: Airbag System Basis Chip Sbc With Power Supply And Psi5 Sensor Interface
• Manufacturer: Freescale Semiconductor, Inc

FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
-1.0 V, as high as V
They will survive with 40 V load dump.
current limitation. The driver has integrated diagnostics and
short-circuit protection. The output status can be checked by
the MCU via the SPI. All output pin voltages can be monitored
at the multiplexed analog output pin AOUT.
36
33789
The driver output pins can withstand shorts to as low as
The driver output current capability is 70 mA with
OUT1_D
OUT1_S
PRW
V
PWR
+ 1.0 V, and up to 27 V for 5 minutes.
Figure 24. Configurable General Purpose Driver Block Diagram
V
V
PWR
PWR
V
BST
Short to
Short to
Diagnosis Samples
V
GND
PWR
Other Analog
Analog MUX
AOUT
PWM
(128Hz)
Detection
modulator. Thus, the driver can be used as a dimmable
indicator driver (such as an LED). When this option is
selected, the activation of both drivers will be logically
synchronized, which means both drivers will be turned on
simultaneously. This allows an application to combine both
drivers in parallel to drive a single load with a doubled drive
capability.
down features to improve performance and reliability.
Failure
Control
Logic
The driver control block has a built-in 128 Hz 6-bit PWM
The output stage has slew rate control and thermal shut
Interface
SPI
SPI
Analog Integrated Circuit Device Data
OUT2_D
OUT2_S
Freescale Semiconductor
V
PWR