L6452 datasheet(7/22 Pages) STMICROELECTRONICS

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L6452

Pin description

7/22

ChSel

Channel Select:

A low level enables channel A and a high level enables channel B

Decoder input signals when EnIC is low

UpC/S2

UpCount/S2:

A high level enables the internal counter to up counting. A low level

enables down counting depending on EnlC value it becomes S2.

ResC/S1

Reset Count/S1:

A low level resets the internal counter depending on EnlC value it

becomes S1.

EnCh

Enable Channel:

A low level enables the selected channel (this input has an internal

pull up resistor)

ClkC/S0

A high level clocks the internal counter depending on EnlC value it

becomes S0.

StepUpGND

Ground of step up block

StepUpBoost

Boost voltage

VstepUp

Driving voltage of power DMOS stage

VDD

5V logic supply

Rext

An external resistor connected to ground fixes the internal current

source value

94, 95

RxB, RxA

Current source outputs

96, 97

VxA, VxB

RxA, RxB voltage after an optional external filter

OnEnable

A low level enables the current source generator according the A/B

and ON/OFF control register bit

CRclock

Data on pin CRdata are stored into the register on the rising edge of

this pin

100

CRdata

Control register serial data input

Table 1.

Pin function - continued

Pin #

Name

Function

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