Datasheet

Analog Integrated Circuit Device Data

22 Freescale Semiconductor

07XSC200

4 Functional Description

4.1 Introduction

The 07XSC200 is one in a family of devices designed for low-voltage lighting applications. Its two low R

DS(ON)

MOSFETs (dual

7.0

m) can control two separate 55 W / 28 W bulbs and/or Xenon modules.

Programming, control and diagnostics are accomplished using a 16-bit SPI interface. Its output with selectable slew rate

improves electromagnetic compatibility (EMC) behavior. Additionally, each output has its own parallel input or SPI control for

pulse-width modulation (PWM) control if desired. The 07XSC200 allows the user to program via the SPI, the fault current trip

levels and duration of acceptable lamp inrush. The device has fail-safe mode to provide fail-safe functionality of the outputs in

case of MCU damaged.

4.2 Functional Pin Description

4.2.1 Output Current Monitoring (CSNS)

The Current Sense pin provides a current proportional to the designated HS0 : HS1 output or a voltage proportional to the

temperature on the GND flag. That current is fed into a ground-referenced resistor (2.5 k typical) and its voltage is monitored

by an MCU's A/D. The output type is selected via the SPI. This pin can be tri-stated through the SPI.

4.2.2 Direct Inputs (IN0, IN1)

Each IN input wakes the device. The IN0 : IN1 high side input pins are also used to directly control HS0 : HS1 high side output

pins. If the outputs are controlled by PWM module, the external PWM clock is applied to IN0 pin. These pins are to be driven with

CMOS levels, and they have a passive internal pull-down, R

DWN

4.2.3 Fault Status (FSB)

This pin is an open drain configured output requiring an external pull-up resistor to V

for fault reporting. If a device fault

condition is detected, this pin is active LOW. Specific device diagnostics and faults are reported via the SPI SO pin.

4.2.4 WAKE (WAKE)

The WAKE input wakes the device. An internal clamp protects this pin from high damaging voltages with a series resistor (10 k

typ). This input has a passive internal pull-down, R

DWN

4.2.5 PWM Clock (CLOCK)

The clock input wakes the device. The PWM frequency and timing are generated from clock input by the PWM module. The clock

input frequency is the selectable factor 2

= 128. This input has a passive internal pull-down, R

DWN

4.2.6 RESET (RSTB)

The RESET input wakes the device. This is used to initialize the device configuration and fault registers, as well as place the

device in a low-current sleep mode. The pin also starts the watchdog timer when transitioning from logic [0] to logic

[1]. This pin

has a passive internal pull-down, R

DWN