VN7140AJ, VN7140AS

List of figures

DocID027401 Rev 3

5/55

List of figures

Figure 1: Block diagram ..............................................................................................................................7

Figure 2: Configuration diagram (top view).................................................................................................8

Figure 3: Current and voltage conventions.................................................................................................9

Figure 4: IOUT/ISENSE versus IOUT.......................................................................................................18

Figure 5: Current sense accuracy versus IOUT .......................................................................................18

Figure 6: Switching time and Pulse skew .................................................................................................19

Figure 7: MultiSense timings (current sense mode) .................................................................................19

Figure 8: Multisense timings (chip temperature and VCC sense mode) (VN7140AJ only)......................20

Figure 9: TDSTKON..................................................................................................................................20

Figure 10: Latch functionality - behavior in hard short circuit condition (TAMB << TTSD) ......................22

Figure 11: Latch functionality - behavior in hard short circuit condition....................................................22

Figure 12: Latch functionality - behavior in hard short circuit condition (autorestart mode + latch off) ....23

Figure 13: Standby mode activation .........................................................................................................23

Figure 14: Standby state diagram.............................................................................................................24

Figure 15: OFF-state output current .........................................................................................................24

Figure 16: Standby current .......................................................................................................................24

Figure 17: IGND(ON) vs. Tcase ...............................................................................................................25

Figure 18: Logic Input high level voltage ..................................................................................................25

Figure 19: Logic Input low level voltage....................................................................................................25

Figure 20: High level logic input current ...................................................................................................25

Figure 21: Low level logic input current ....................................................................................................25

Figure 22: Logic Input hysteresis voltage .................................................................................................25

Figure 23: FaultRST Input clamp voltage .................................................................................................26

Figure 24: Undervoltage shutdown ...........................................................................................................26

Figure 25: On-state resistance vs. Tcase .................................................................................................26

Figure 26: On-state resistance vs. VCC ...................................................................................................26

Figure 27: Turn-on voltage slope ..............................................................................................................26

Figure 28: Turn-off voltage slope ..............................................................................................................26

Figure 29: Won vs. Tcase .........................................................................................................................27

Figure 30: Woff vs. Tcase .........................................................................................................................27

Figure 31: ILIMH vs. Tcase.......................................................................................................................27

Figure 32: OFF-state open-load voltage detection threshold ...................................................................27

Figure 33: Vsense clamp vs. Tcase..........................................................................................................27

Figure 34: Vsenseh vs. Tcase ..................................................................................................................27

Figure 35: Application diagram .................................................................................................................29

Figure 36: Simplified internal structure .....................................................................................................29

Figure 37: MultiSense and diagnostic

– block diagram ............................................................................32

Figure 38: MultiSense block diagram .......................................................................................................33

Figure 39: Analogue HSD

– open-load detection in off-state ...................................................................34

Figure 40: Open-load / short to VCC condition.........................................................................................35

Figure 41: GND voltage shift ....................................................................................................................36

Figure 42: Maximum turn off current versus inductance ..........................................................................37

Figure 43: PowerSSO-16 on two-layers PCB (2s0p to JEDEC JESD 51-5) ............................................38

Figure 44: PowerSSO-16 on four-layers PCB (2s2p to JEDEC JESD 51-7) ...........................................38

Figure 45: PowerSSO-16 Rthj-amb vs PCB copper area in open box free air condition (one channel on)

..................................................................................................................................................................39

Figure 46: PowerSSO-16 thermal impedance junction ambient single pulse (one channel on) ..............39

Figure 47: Thermal fitting model of a double-channel HSD in PowerSSO-16..........................................40

Figure 48: S0-8 on two-layers PCB (2s0p to JEDEC JESD 51-5) ...........................................................41

Figure 49: SO-8 on four-layers PCB (2s2p to JEDEC JESD 51-7) ..........................................................41

Figure 50: SO-8 Rthj-amb vs PCB copper area in open box free air condition (one channel on) ...........42

Figure 51: SO-8 thermal impedance junction ambient single pulse (one channel on) .............................42

Figure 52: Thermal fitting model of a double-channel HSD in SO-8 ........................................................43