UM1556 datasheet(3/87 Pages) STMICROELECTRONICS

3 / 87 page

UM1556

Contents

Doc ID 023520 Rev 2

3/87

3.1

Digital HSD diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Switching inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4.1

Turn-on phase behaviour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4.2

Turn-off phase behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.2.1

Calculation of energy dissipated in the HSD . . . . . . . . . . . . . . . . . . . . . 41

4.2.2

Calculation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.3

Proper HSD selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3.1

Example of VND5E160AJ driving relays . . . . . . . . . . . . . . . . . . . . . . . . 44

4.4

External clamping selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.4.1

Clamping circuitry examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4.4.2

Component selection guide for external transil-diode clamping . . . . . . 52

4.4.3

Examples of VN5E025AJ for DC motor driving with external clamp) . . 56

High Side Driver selection for lamp loads . . . . . . . . . . . . . . . . . . . . . . 66

Paralleling of HSDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.1

Paralleling of CS_DIS (current sense disable) and IN (input) . . . . . . . . . 72

6.1.1

Monolithic HSDs supplied from different supply lines . . . . . . . . . . . . . . 72

6.1.2

Hybrid HSDs supplied from different supply lines . . . . . . . . . . . . . . . . . 73

6.1.3

Mix of monolithic and hybrid HSDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

6.2

Paralleling of CS pins (current sense) . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.2.1

Monolithic HSDs supplied from different supply lines . . . . . . . . . . . . . . 76

6.2.2

Hybrid HSDs supplied from different supply lines . . . . . . . . . . . . . . . . . 77

6.2.3

Mix of monolithic and hybrid HSDs supplied from different supply lines 78

ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7.1

ESD protection of HSD – calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7.2

ESD protection – ECU level (layout consideration) . . . . . . . . . . . . . . . . . 84

Robust design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

8.1

Design suggestions for HSDs and relays on the same PCB . . . . . . . . . . 85

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

UM1556 Datasheet(PDF) 3 Page - STMicroelectronics

UM1556 Datasheet(HTML) 3 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

Datasheet Download

Link URL