Datasheet
Analog Integrated Circuit Device Data
24 Freescale Semiconductor
07XSC200
4.2.15 Fail-safe Input (FSI)
This pin incorporates an active internal pull-up current source from internal supply (V
REG
). This enables the watchdog time-out
feature.
When the FSI pin is opened, the watchdog circuit is enabled. After a watchdog time-out occurs, the output states depends on
IN[0:1].
When the FSI pin is connected to GND, the watchdog circuit is disabled. The output states depends on IN[0:1] in case of V
DD
Failure condition, in case V
DD
failure detection is activated (VDD_FAIL_en bit sets to logic [1]).
4.3 Functional Internal Block Description
Figure 9. Functional Block Diagram
4.3.1 Power Supply
The 07XSC200 is designed to operate from 4.0 to 28 V on the VPWR pin. Characteristics are provided from 6.0 to 20 V for the
device. The VPWR pin supplies power to internal regulator, analog, and logic circuit blocks. The V
DD
supply is used for Serial
Peripheral Interface (SPI) communication to configure and diagnose the device. This IC architecture provides a low quiescent
current sleep mode. Applying V
PWR
and V
DD
to the device will place the device in the Normal mode. The device will transit to
Fail-safe mode in case of failures on the SPI or/and on V
DD
voltage.
4.3.2 High Side Switches: HS0–HS1
These pins are the high side outputs controlling lamps located for the front of vehicle, such as 65 W/55 W bulbs and Xenon-HID
modules. N-channel MOSFETs with 7.0
m R
DS(ON)
are self-protected and present extended diagnostics to detect bulb outage
and a short-circuit fault condition. The HS output is actively clamped during turn off of inductive loads and inductive battery line.
When driving DC motor or solenoid loads demand multiple switching, an external recirculation device must be used to maintain
the device in its Safe Operating Area.
Power Supply
07XSC200 - Functional Block Diagram
Parallel Control Inputs
MCU Interface & Output Control
SPI Interface
Self-protected
Supply MCU Interface & Output Control Self-protected High Side Switches
PWM Controller
High Side
Switches
HS0 - HS1
MCU
Interface