L9305 datasheet(101/107 Pages) STMICROELECTRONICS

101 / 107 page

Contents

Block diagram .....................................................................3

Pins description ..................................................................6

Product Characteristics............................................................9

3.1

Absolute maximum ratings....................................................... 9

3.2

Latchup trials .................................................................. 9

3.3

ESD performance ............................................................. 10

3.4

Temperature range ............................................................ 10

Input / Output ....................................................................11

4.1

Reset (RESn) ................................................................ 11

4.2

Enable (EN_DR) .............................................................. 11

4.3

Channel inputs (INx/NDISx)..................................................... 11

4.4

Fault (FAULTn) ............................................................... 11

4.5

SPI communications (CS, SCLK, MOSI & MISO) ................................... 12

4.6

Input / output electrical specifications ............................................. 13

Power supply ....................................................................14

5.1

Overview .................................................................... 14

5.2

Battery supply (VBATP) ........................................................ 14

5.3

Load supplies (VSOL1, VSOL2, VSOL3 & VSOL4) ................................. 14

5.4

Analog and digital supply (VDD) ................................................ 15

5.5

I/O supply (VDDIO) ........................................................... 15

5.6

Power-On reset ............................................................... 15

5.7

GND (GNDD, GNDA, GND_SOLx) .............................................. 15

5.8

Charge pump ................................................................ 15

5.9

Startup & power down sequence ................................................ 16

5.10

Power supply electrical specifications ............................................ 17

Current control drivers ...........................................................18

6.1

Hardware current control ....................................................... 18

6.1.1

Current set point programming ............................................. 20

6.1.2

PWM switching period programming......................................... 20

6.1.3

Current control loop configuration ........................................... 20

6.1.4

Fixed frequency control................................................... 21

6.1.5

Variable frequency control................................................. 22

6.1.6

Chopper offset compensation of current sense amplifier ......................... 24

6.1.7

Staggered channel activation .............................................. 24

L9305

Contents

DS12774 - Rev 10

page 101/107

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