UM1556 datasheet(5/87 Pages) STMICROELECTRONICS

5 / 87 page

UM1556

List of figures

Doc ID 023520 Rev 2

5/87

List of figures

Figure 1.

Monolithic digital HSD - application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2.

Monolithic analogue HSD - application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3.

Hybrid analogue HSD – application schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4.

Voltage levels during reverse battery – resistor protection . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 5.

Logical levels check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 6.

Voltage levels during reverse battery using diode-resistor protection network. . . . . . . . . . 12

Figure 7.

Positive ISO pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 8.

Negative ISO pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9.

Voltage levels during reverse battery – MOSFET protection . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 10.

Hybrid HSD - reverse battery protection with self switch-on of the MOSFET. . . . . . . . . . . 16

Figure 11.

Example - Self switch-on of MOSFET eliminated by Dgnd. . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 12.

ISO-pulse transfer to I/O pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 13.

Open load/short to Vcc condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 14.

Open load/short to Vcc condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 15.

M0-5 – “Soft” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 16.

M0-5 – “Hard” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 17.

M0-5Enhanced – “Soft” short to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 18.

M0-5Enhanced – “Hard” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 19.

M0-5 – “Soft” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 20.

M0-5 – “Hard” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 21.

M0-5Enhanced – “Soft” short to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 22.

M0-5Enhanced – “Hard” short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 23.

System reaction time comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 24.

M0-5 High Side Driver with analogue current sense – block diagram . . . . . . . . . . . . . . . . 23

Figure 25.

M0-5 current sense simplified block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 26.

VSENSE vs IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 27.

VSENSE vs VOUT @ IOUT=ILIMH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 28.

Current sense resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 29.

Switchable current sense resistor – example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 30.

VSENSE measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 31.

VND5012A current sense voltage behavior – hard short to GND occurred (20 m

Ω), thermal

shutdown was reached 344 ms after short-circuit to GND . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 32.

Analogue HSD – Circuit for open load detection in off-state . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 33.

Analogue HSD – Open load detection in off-state (M0-5Enhanced) . . . . . . . . . . . . . . . . . 36

Figure 34.

Digital HSD diagnostics – timing overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 35.

Inductive load – HSD turn-on phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 36.

Inductive load – turn-on example: VNQ5E050AK, L=260 mH, R=81

Ω . . . . . . . . . . . . . . . 40

Figure 37.

Inductive load – HSD turn-off phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 38.

Inductive load – turn off example: VNQ5E050AK, L=260 mH, R=81

Ω . . . . . . . . . . . . . . . 43

Figure 39.

Maximum turn-off current versus inductance – VND5E160AJ datasheet. . . . . . . . . . . . . . 46

Figure 40.

Maximum demagnetization energy – VND5E160A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 41.

Demagnetization energy measurement – VND5E160AJ, relay 260 mH . . . . . . . . . . . . . . 47

Figure 42.

External clamping - transil and diode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 43.

Transil – V/A characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 44.

Peak pulse power vs pulse time (for transil 600 W@10/1000 µs series) . . . . . . . . . . . . . . 54

Figure 45.

Equivalent pulses giving the same power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 46.

Maximum peak power as a function of initial temperature of the transil . . . . . . . . . . . . . . . 54

Figure 47.

Maximum turn-off current versus inductance – VN5E025AJ datasheet . . . . . . . . . . . . . . . 57

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