L9305 datasheet(106/107 Pages) STMICROELECTRONICS

106 / 107 page

List of figures

Figure 1.

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

Figure 2.

PWSSO36 application schematic ....................................................... 4

Figure 3.

TQFP48 application schematic ......................................................... 5

Figure 4.

PowerSSO-36 pinout diagram ......................................................... 6

Figure 5.

TQFP48 pinout diagram.............................................................. 6

Figure 6.

Charge pump mechanization ......................................................... 16

Figure 7.

Startup procedure example .......................................................... 16

Figure 8.

HS driver (left) and LS driver (right) configuration ........................................... 18

Figure 9.

Hardware control configuration ........................................................ 19

Figure 10.

Fixed frequency algorithm ........................................................... 21

Figure 11.

Fixed frequency signals ............................................................. 22

Figure 12.

Variable frequency algorithm ......................................................... 23

Figure 13.

Dither waveforms definitions.......................................................... 25

Figure 14.

Software control configuration ........................................................ 26

Figure 15.

Low side configuration diagnostic ...................................................... 30

Figure 16.

High side configuration diagnostic ...................................................... 30

Figure 17.

Fail safe concept ................................................................. 35

Figure 18.

Oscillator monitor ................................................................. 42

Figure 19.

HS/LS current compare example ...................................................... 43

Figure 20.

ADC check block diagram ........................................................... 44

Figure 21.

SPI Frame Format ................................................................ 47

Figure 22.

Out of frame response .............................................................. 47

Figure 23.

SPI frame after Power On Reset ....................................................... 48

Figure 24.

Clear on Read SPI sequence ......................................................... 48

Figure 25.

SPI write sequence ................................................................ 48

Figure 26.

SPI frame with error on previous SPI frame ............................................... 49

Figure 27.

SPI timings, thresholds 20% to 80% and viceversa .......................................... 52

Figure 28.

TQFP48 (7x7x1 mm exp. pad down 5.0x5.0) package outline ................................... 92

Figure 29.

TQFP48 (7x7x1.0 exposed pad down) footprint ............................................ 95

Figure 30.

TQFP48 marking information ......................................................... 96

Figure 31.

PowerSSO-36 (7.2x4.75 mm option C exposed pad down) package outline ......................... 97

Figure 32.

PowerSSO-36 marking information ..................................................... 99

L9305

List of figures

DS12774 - Rev 10

page 106/107

L9305 Datasheet(PDF) 106 Page - STMicroelectronics

L9305 Datasheet(HTML) 106 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL