Datasheet

TLE6288R

Description

Data Sheet 10 Rev. 2.4, 2007-08-08

4 Description

4.1 General Functional Description

Channel 1 to 3

• High Side Configuration with Charge Pump

• On / off Current Control

• Peak & Hold Current Control with fixed off time, values adjustable by SPI

• Type of current control can be selected by SPI

• Peak Current,Peak Time, Hold Current and Off-Time can be selected by SPI to set average and ripple current

for a given load (refer to Figure 6)

Channel 4 to 6

• Configurable as either High or Low Side switch (by SPI)

• On / Off operation

4.1.1 Output Stage Control: Parallel Control and SPI Control

A Boolean operation (either AND or OR) is performed on each of the parallel inputs IN 1 … 6 and respective SPI

data bits, in order to determine the states of the respective outputs. The type of Boolean operation performed is

programmed via the serial interface. Both, parallel inputs and respective SPI databits are high active.

Figure 4 Serial Input Bits 6-11 of Command “Channels on/off”

Each output is independently controlled by an output latch and a common reset line FSIN, which disables all

outputs. A logic high input ‘data bit’ turns the respective output channel ON, a logic low ‘data bit’ turns it OFF.

Table 2 Truth Table

Parallel Input SPI Bit Output OR Output AND

00OFFOFF

0 1 ON OFF

1 0 ON OFF

1 1 ON ON

AND

Output

Driver

IN 1…6

Serial Input bits 6 -11 of command

„Channels on / off „