MC06XSD200FK データシートの表示（PDF） - Freescale Semiconductor

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MC06XSD200FK

Dual 6.0 mOhm High Side Switch

Freescale Semiconductor 

FUNCTIONAL DESCRIPTION

INTRODUCTION

FUNCTIONAL DESCRIPTION

INTRODUCTION

The 06XSD200 is a two-channel, high side switch that can

sustain up to 36 V, with integrated control and diagnostics

designed for industrial applications. The device provides a

high number of protective functions. Both low RDS(ON)

channels (<6.0 m) can independently drive various load

types like light bulbs, solenoid actuators, or DC motors.

Device control and diagnostics are configured through a

16-bit SPI port with daisy chain capability.

Independently programmable output voltage slew rates

allow satisfying electromagnetic compatibility (EMC)

requirements.

Both channels can independently be operated in several

different switching modes: internal clock, internal PWM mode

(fully autonomous operation), external clock, and direct

control switching mode.

Current sensing with an adjustable ratio is available on

both channels, allowing both high current (bulbs) and low

current (LED) monitoring. By activating the Track & Hold

mode, current monitoring can be performed during the

switch-Off phase. This allows random access to the current

sense functionality. A patented offset compensation

technique further enhances current sense accuracy.

To avoid turning off during inrush current, while being able

to monitor it, the device features a dynamic overcurrent

threshold profile. For bulbs, this profile is a stair function with

stages of which the height and width are programmable

through the SPI port. DC motors can be protected from

overheating by activating a specific window-shaped

overcurrent profile that allows stall currents of limited

duration.

Whenever communication with the external micro-

controller is lost, the device enters Fail-safe Operation mode,

but remains operational, controllable and protected.

PIN ASSIGNMENT AND FUNCTIONS

Functions and register bits that are implemented

independently for both channels have extension “_s”. Max.

ratings of the pins are given in Table 2.

OUTPUT CURRENT MONITORING (CSNS)

The CSNS pin allows independent current monitoring of

channel 0 or channel 1 up to the steady-state overcurrent

threshold. It can also be used to sense the device

temperature. The different functions are selected by setting

bits CSNS1_en and CSNS0_en to the appropriate value

(Table 11). When the CSNS pin is sensed during switch-off in

the (optional) track & hold mode, it outputs the scaled value

of the load current as it was just before turn-Off. When

several devices share the same pull-down resistor, the CSNS

pins of unused devices must be tri-stated. This is

accomplished by setting CSNS0_en = 0 and CSNS1_en = 0

in the GCR register. Settling time (tCSNSVAL_XX) is defined as

the time between the instant at the middle of the output

voltage’s rising edge (HS[0:1] = 50% of VPWR), and the

instant at which the voltage on the CSNS-pin has settled to

±5.0% of its final value. Anytime an overcurrent window is

active, the CSNS pin is disabled (see Overcurrent Detection

on Resistive and Inductive Loads). The current and

temperature sensing functions are unavailable in Fail-safe

mode and in Normal mode when operating without the VDD

supply voltage. In order to generate a voltage output, a pull-

down resistor is required (R(CSNS)=1.0 k typ. and 470 <

R(CSNS) < 10 k). When the current sense resistor connected

to the CSNS pin is disconnected, the CSNS voltage is

clamped to VCL(CSNS). The CSNS pin can source currents up

to about 5.6 mA.

CURRENT SENSE SYNCHRONIZATION (SYNC)

To synchronize current sensing with an external process,

the SYNC signal can be connected to a digital input of an

external MCU. SYNC is asserted logic low when the current

sense signal is accurate and ready to be read. The current

sense signal on the CSNS pin has the specified accuracy

tSYNREAD_XX seconds after the falling edge on the SYNC pin

(Figure 9) and remains valid until a rising edge is generated.

The rising edge that is generated by the SYNC pin at the turn-

OFF instant (internal or external) may also be used to

implement synchronization with the external MCU.

Parameter tSYNCVAL_XX is defined as the time between the

instant at the middle of the output-voltage rising edge

(HS[0:1] = 50% of VPWR), and the instant at which the voltage

on the SYNC-pin drops below 0.4 V (VSOL). The SYNC pins

of different devices can be connected together to save micro-

controller input channels. However, in this configuration, the

CSNS function of only one device should be active at a time.

Otherwise, the MCU does not determine the origin of the

SYNC signal. The SYNC pin is open drain and requires an

external pull-up resistor to VDD.

DIRECT CONTROL INPUTS (IN0 AND IN1)

The IN[0:1] pins allow direct control of both channels. A

logic [0] level turns off the channel and a logic[1] level turns it

on (Channel Control in Normal Mode). When the device is in

Sleep mode, a transition from logic 0 to logic 1 on any of

these pins wake it up (Sleep Mode). If it is desired to

automatically turn on the channels after a transition to Fail-

safe mode, inputs IN[0] and IN[1] must be externally

connected to the VPWR pin by a pull-up resistor (e.g. 10 k

typ. However, this prevents the device from going into Sleep

Analog Integrated Circuit Device Data

Freescale Semiconductor

06XSD200

23

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