07XSC200 datasheet(24/51 Pages) FREESCALE

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Analog Integrated Circuit Device Data



Freescale Semiconductor

07XSC200

4.2.15 Fail-safe Input (FSI)

This pin incorporates an active internal pull-up current source from internal supply (VREG). 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 VDD

Failure condition, in case VDD 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 VDD 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 VPWR and VDD 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 VDD 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

 RDS(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

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